You searched for subject:(Burner).
Showing records 1 – 30 of
128 total matches.
◁ [1] [2] [3] [4] [5] ▶
Oregon State University
1.
Fillo, Aaron Jesse.
The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames.
Degree: MS, Mechanical Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/60072 
► Large-hydrocarbon fuels are used for ground and air transportation because of their high energy-density and will be for the foreseeable future. However, combustion of large-hydrocarbon…
(more)
▼ Large-hydrocarbon fuels are used for ground and air transportation because of their
high energy-density and will be for the foreseeable future. However, combustion of
large-hydrocarbon fuels in a turbulent environment is poorly understood and difficult
to predict. The turbulent flame speed, which is the velocity at which a flame front
propagates through a turbulent fuel and air mixture, is a key property in turbulent
combustion. The turbulent flame speed can be used as a model input parameter for tur-
bulent combustion simulations. However, turbulent flame speeds for large-hydrocarbon
fuels are largely unknown. These values are needed to improve combustion models and
enhance understanding of the physics and chemistry that control turbulent combustion
of large-hydrocarbon fuels.
The objective of this study is to measure the turbulent flame speed of large-hydrocarbon
fuels and to identify key physics in the turbulent combustion of these fuels. This is
motivated by the use of the turbulent flame speeds in modeling combustion in practical
devices and the significant use of large-hydrocarbons in these devices. This research has
broad implications for society and industry; both the Federal Aviation Administration
and gas turbine engine companies have called for research on the turbulent flame speeds
of large-hydrocarbon fuels.
The turbulent flame speed in this work is defined as the global consumption speed,
and is measured for three fuels on a turbulent Bunsen
burner. The Reynolds number,
turbulence intensity, preheat temperature, and equivalent ratio can be independently
controlled using the
burner. A conventional Jet-A fuel, known as A2, is used as a
reference because of its common use in commercial and military aviation. A2 is compared
to bi-modal and quadra-modal blends referred to as C1 and C5, respectively. These fuels
are selected as they have similar heat releases and laminar flame speeds. Time-averaged
line of site images of OH*, CH*, and CO₂* chemiluminescence are used to determine an
the average flame front area. This flame area is used to determine the global consumption
speed. The global consumption speed is measured for Reynolds number and equivalence
ratio ranging between 5.000-10.000 and 0.7-1, respectively. Turbulence intensities are
varied between 10% and 20% of the bulk flow velocity.
The global consumption speed increases with turbulence intensity and Reynolds number
for all fuels. Global consumption speeds for A2 and C5 match within 5% at all conditions.
Conversely, the global consumption speed of C1 is up to 22% lower than A2 or C5.
These results indicate the global consumption speed is sensitive to turbulent velocity
fluctuations, bulk flow velocity, and fuel chemistry. These results together suggest the
global consumption speed is additionally sensitive to flame stretch.
Dimensional analysis is used to isolate and identify sensitivities of the global consumption
speed to turbulent velocity fluctuations, bulk flow velocity, global stretch rate, and fuel
…
Advisors/Committee Members: Blunck, David L. (advisor), Niemeyer, Kyle (committee member).
Subjects/Keywords: Large-hydrocarbon; Bunsen burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fillo, A. J. (2016). The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/60072
Chicago Manual of Style (16th Edition):
Fillo, Aaron Jesse. “The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames.” 2016. Masters Thesis, Oregon State University. Accessed March 01, 2021.
http://hdl.handle.net/1957/60072.
MLA Handbook (7th Edition):
Fillo, Aaron Jesse. “The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames.” 2016. Web. 01 Mar 2021.
Vancouver:
Fillo AJ. The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1957/60072.
Council of Science Editors:
Fillo AJ. The Global Consumption Speeds of Premixed Large-Hydrocarbon Fuel/Air Turbulent Bunsen Flames. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/60072
University of Toronto
2.
Schneider, Christopher Eric.
Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner.
Degree: 2019, University of Toronto
URL: http://hdl.handle.net/1807/94039
► The dynamics of flame flashback were studied in a lean premixed swirl burner with central bluff-body. A range of conditions with varied flow velocities, inlet…
(more)
▼ The dynamics of flame flashback were studied in a lean premixed swirl burner with central bluff-body. A range of conditions with varied flow velocities, inlet temperatures, and hydrogen/methane flow rates were investigated. Intermittent movement of the flame into the feed tube, was found over a range of conditions, with consistent trends as the system moved from stable operation to complete flashback. Statistical analysis of chemiluminescence data showed a strong link between characteristic behaviours of the system, such as the statistical frequency of upstream propagating flame protrusions, and the magnitude of the flashback, independent of the inlet conditions. Effects of conditions on the flashback magnitude and abruptness of transition are described. Existing metrics for predicting flashback were found to be inadequate for describing the observed dynamics. Laser diagnostics revealed only a slight statistical drop in axial flow velocity upstream of the flame, which appeared to strengthen as the flame moved upstream.
M.A.S.
Advisors/Committee Members: Steinberg, Adam M., Aerospace Science and Engineering.
Subjects/Keywords: Flashback; Lean Premixed Combustion; Swirl Burner; 0538
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schneider, C. E. (2019). Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/94039
Chicago Manual of Style (16th Edition):
Schneider, Christopher Eric. “Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner.” 2019. Masters Thesis, University of Toronto. Accessed March 01, 2021.
http://hdl.handle.net/1807/94039.
MLA Handbook (7th Edition):
Schneider, Christopher Eric. “Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner.” 2019. Web. 01 Mar 2021.
Vancouver:
Schneider CE. Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner. [Internet] [Masters thesis]. University of Toronto; 2019. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1807/94039.
Council of Science Editors:
Schneider CE. Incipient Behaviour of Flashback in a Lean Premixed Swirl Burner. [Masters Thesis]. University of Toronto; 2019. Available from: http://hdl.handle.net/1807/94039
Delft University of Technology
3.
Lantzos, I. (author).
Molten Salt Fast Reactor: Shift from Burner to Breeder.
Degree: 2016, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:21a2c1e4-d4a3-4a10-a6dc-950eeb8e27e8
► The nuclear reactors currently in operation utilise only a small fraction of the available natural uranium. By continuing in this track, known resources will be…
(more)
▼ The nuclear reactors currently in operation utilise only a small fraction of the available natural uranium. By continuing in this track, known resources will be depleted too soon. Furthermore, Light Water Reactors (LWR) need to be shut down periodically so that refueling can take place. On top of that, their spent fuel must be safely stored for thousands of years. These unfortunate facts call for nuclear reactors which can convert non-fissile isotopes to fissile ones and produce less long-lived transuranic elements. Such a reactor is the Molten Salt Fast Reactor (MSFR). In this project in-house developed codes were used for neutronics (DALTON) and burnup (LOWFAT) calculations. The isotopic evolution of nuclides in the core and in the fertile blanket was simulated for two different initial core loadings: a mixture containing 233U as the fissile material and a mixture with transuranium elements (TRU) produced by a LWR. Moreover, the transition from the second configuration (actinide burner) to the first one was investigated. The results showed a huge reduction in the share of the initial isotopes for the TRU-started MSFR after one century of operation. The amount of 233U in the reactor core at that time is equal to the amount needed to create an initial inventory of a 233U-started MSFR, while the 233U to keep the reactor critical can be covered by the 233U bred by the 233Pa extraction from the fertile blanket. Both these facts lead to the conclusion that a transition from a burner to a breeder MSFR is possible.
Nuclear Energy & Radiation Applications (NERA)
RST/Radiation, Science and Technology
Applied Sciences
Advisors/Committee Members: Kloosterman, J.L. (mentor).
Subjects/Keywords: MSFR; Breed; burnup; fertile blanket; burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lantzos, I. (. (2016). Molten Salt Fast Reactor: Shift from Burner to Breeder. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:21a2c1e4-d4a3-4a10-a6dc-950eeb8e27e8
Chicago Manual of Style (16th Edition):
Lantzos, I (author). “Molten Salt Fast Reactor: Shift from Burner to Breeder.” 2016. Masters Thesis, Delft University of Technology. Accessed March 01, 2021.
http://resolver.tudelft.nl/uuid:21a2c1e4-d4a3-4a10-a6dc-950eeb8e27e8.
MLA Handbook (7th Edition):
Lantzos, I (author). “Molten Salt Fast Reactor: Shift from Burner to Breeder.” 2016. Web. 01 Mar 2021.
Vancouver:
Lantzos I(. Molten Salt Fast Reactor: Shift from Burner to Breeder. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Mar 01].
Available from: http://resolver.tudelft.nl/uuid:21a2c1e4-d4a3-4a10-a6dc-950eeb8e27e8.
Council of Science Editors:
Lantzos I(. Molten Salt Fast Reactor: Shift from Burner to Breeder. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:21a2c1e4-d4a3-4a10-a6dc-950eeb8e27e8
Brno University of Technology
4.
Sobočík, Robert.
Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/13858
► This Bachelor’s thesis is focused on testing facilities intended for burner testing. It deals with a thorough research of accessible material including specialist technical literature…
(more)
▼ This Bachelor’s thesis is focused on testing facilities intended for
burner testing. It deals with a thorough research of accessible material including specialist technical literature and relevant websites in order to gather any available information on current burners and monitor present situation in the market, as well as to provide new information on
burner testing facilities and collecting, processing and evaluating the data gained in testing process in Czech and foreign companies.
Advisors/Committee Members: Bělohradský, Petr (advisor), Hájek, Zdeněk (referee).
Subjects/Keywords: Hořák; spalování; zkušební zařízení; zkouška hořáků.; Burner; combustion; testing facility; burner testing.
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sobočík, R. (2018). Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/13858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sobočík, Robert. “Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing.” 2018. Thesis, Brno University of Technology. Accessed March 01, 2021.
http://hdl.handle.net/11012/13858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sobočík, Robert. “Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing.” 2018. Web. 01 Mar 2021.
Vancouver:
Sobočík R. Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/11012/13858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sobočík R. Zkušební zařízení pro zkoušky hořáků: Testing facilities for burner testing. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/13858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
5.
Kao, Yi-Huan.
Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.
Degree: MS, Engineering and Applied Science: Aerospace
Engineering, 2012, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424
► The NexGen (sonic) burner is a new burner designed by the Federal Aviation Administration (FAA) Tech Center for the required FAA fire certification tests on…
(more)
▼ The NexGen (sonic)
burner is a new
burner designed by
the Federal Aviation Administration (FAA) Tech Center for the
required FAA fire certification tests on Powerplant. The objective
of this study is to understand the performance of this
burner and
provide the benchmark to adapt the
burner setting for future FAA
fire tests. The NexGen
burner was found to satisfy the temperature
and heat flux requirements under FAA fire test guidelines. This
NexGen
burner was modified by adding four tabs to turbulator in the
current study and was found to result in wider and more uniform
flames which increase the
burner robustness for the fire test.
Calibrations of heat flux and thermocouple temperature from NexGen
burner were much more sensitive to a change in the fuel flow rate
as opposed to a change in air flow rate. However, the fire test
results on the samples were also sensitive to air flow rate. It is
recommended that both fuel and air flow rate of NexGen
burner
should be regulated in future FAA fire tests. The influence of
thermocouple size on flame calibrations and fire test results was
studied. The
burner calibrated with smaller thermocouple size will
produce less damage on the test sample. It is recommended that FAA
should have a narrower tolerance on the thermocouple size used in
the temperature calibrations. The performance of ISO gas
burner was
also studied. Heat flux produced by ISO gas
burner was found much
lower than that by NexGen
burner, and the damage induced by gas
burner in a horizontal orientation is significantly less than that
by the NexGen
burner. Fire tests were conducted on two different
sample sizes. Smaller sample could survive longer under the same
burner operating conditions. It is recommended that the sample size
should be specified in future FAA fire tests.
Advisors/Committee Members: Jeng, San-Mou (Committee Chair).
Subjects/Keywords: Engineering; fire test; NexGen burner; gas burner
…51
Figure 37: temperature profile for NexGen and gas burner on type B test sample (12… …x12”) .... 53
Figure 38: Test Sample after 20 minutes under gas burner operating… …53
IV
List of Tables
Table 1: burner performance comparison between different… …turbulators .................................. 23
Table 2: burner performance comparison between… …51
Table 10: test conditions and calibration data for sample fire test of NexGen burner…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kao, Y. (2012). Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424
Chicago Manual of Style (16th Edition):
Kao, Yi-Huan. “Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.” 2012. Masters Thesis, University of Cincinnati. Accessed March 01, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424.
MLA Handbook (7th Edition):
Kao, Yi-Huan. “Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.” 2012. Web. 01 Mar 2021.
Vancouver:
Kao Y. Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. [Internet] [Masters thesis]. University of Cincinnati; 2012. [cited 2021 Mar 01].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424.
Council of Science Editors:
Kao Y. Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. [Masters Thesis]. University of Cincinnati; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1353156424
Universidade Federal de Viçosa
6.
Douglas Romeu da Costa.
Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos.
Degree: 2010, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2876
► Objetivou-se com este trabalho desenvolver e avaliar o desempenho de um gerador de gás quente para a secagem de produtos agrícolas. O gerador de gás…
(more)
▼ Objetivou-se com este trabalho desenvolver e avaliar o desempenho de um gerador de gás quente para a secagem de produtos agrícolas. O gerador de gás quente foi acoplado a um secador de leito fixo em leiras para a execução dos testes. Foram dimensionados e testados dois bicos de gás com inclinações de 25 e 45 graus. A temperatura do ar de secagem foi controlada em 60 e 100 C. O combustível GLP foi utilizado para o aquecimento complementar do ar de secagem. O milho em grãos (Zea mays L.) com teor inicial de água de aproximadamente 12,0% b.u. foi usado no experimento. Para o desempenho do gerador de gás quente analisou-se a eficiência térmica, as características da chama e a composição dos gases de combustão. Pelos resultados, verificou-se que a metodologia utilizada é adequada para o dimensionamento do gerador de gás quente, considerando-se as características do protótipo experimental. As concentrações de monóxido de carbono medidas indicaram que a combustão foi completa e que o gerador de gás quente foi operado de maneira correta. As chamas formadas no gerador de gás quente demonstraram que a combustão se desenvolveu de forma estável e regular. O gerador de gás quente teve eficiência térmica coerente com os valores encontrados na literatura. O gerador de gás quente possui potencial para disponibilizar ar aquecido com qualidade para a secagem de grãos sem risco de contaminação.
The objective of this study was to develop and evaluate the performance of a gas heater for drying of agricultural products. A heater was coupled to a fixed bed dryer in rows for execution of the tests. The gas nozzles were sized and tested with inclinations of 25 and 45 degrees. Drying air temperature was controlled at 60 and 100C. Combustible LPG was used to heat the drying air. Maize grain (Zea mays L.) with an initial moisture content of 12.0% w.b. was used in the experiment. To evaluate the performance of the gas heater, the thermal efficiency, flame characteristics and composition of the combustion gases were analyzed. From the results, it was possible to verify that the utilized methodology is adequate for sizing of the heater, considering the characteristics of the experimental prototype. Concentrations of carbon monoxide were measured which indicate that combustion was complete and that the heater was operated correctly. Flames formed in the gas heater demonstrated that combustion was both stable and regular. The gas heater presented a thermal efficiency comparable with values encountered in literature, and possesses the potential to provide quality heated air for grain drying with no risk of contamination.
Advisors/Committee Members: Márcio Arêdes Martins, Adílio Flauzino de Lacerda Filho, Paulo Marcos de Barros Monteiro, Sergio Mauricio Lopes Donzeles, Jadir Nogueira da Silva, Luis Otávio Nunes da Silva.
Subjects/Keywords: Queimador a gás; Energia; ENERGIZACAO RURAL; Gas burner; Energy
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Costa, D. R. d. (2010). Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2876
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Costa, Douglas Romeu da. “Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos.” 2010. Thesis, Universidade Federal de Viçosa. Accessed March 01, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2876.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Costa, Douglas Romeu da. “Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos.” 2010. Web. 01 Mar 2021.
Vancouver:
Costa DRd. Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos. [Internet] [Thesis]. Universidade Federal de Viçosa; 2010. [cited 2021 Mar 01].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2876.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Costa DRd. Desenvolvimento de um gerador de gás quente e identificação do seu potencial para a secagem de grãos. [Thesis]. Universidade Federal de Viçosa; 2010. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2876
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
7.
Khan, Yasir.
System and Component Analysis of a 1kW Diesel fuelled SOFC system
.
Degree: Chemical Engineering, 2013, Queens University
URL: http://hdl.handle.net/1974/8441
► The first part of this thesis intends to create a fuel processor model capable of generating 1kW power as output through the use of a…
(more)
▼ The first part of this thesis intends to create a fuel processor model capable of generating 1kW power as output through the use of a solid oxide fuel cell system. The fuel processor system consists of a reformer, heat exchanger network, desulphurizer and an afterburner. Modelled in VMGSimTM, inlet diesel gas is provided at the mass flow rate of 0.2596kg/hour, with the oxygen to carbon ratio calculated at 0.31 and the steam to carbon ratio arbitrarily set to be 2.25. The diesel fuel is preheated and mixed with air and steam and then fed to the auto-thermal reformer. The higher hydrocarbons are broken down and converted into hydrogen. The outlet of the reformer is fed into the SOFC where H2 is converted to generate energy which, in this case is approximately 1200W. The off gas is fed to the afterburner; where the remaining H2 is burnt and the energy is used to provide for steam generation and pre-heating through the heat exchangers. The project also focuses upon performing basic sizing calculations on components of the system. The fuel cell efficiency was found to be 62% and the system efficiency was calculated to be approximately 41%, which falls within the range given in literature.
For the second part of this work, a ceramic porous tail-gas burner using a non-premixed feed of anode exhaust and air was modeled using COMSOL™. The reaction kinetics were experimentally assessed on the basis of COMSOL™ limitations and accuracy of the comparative results. Three performance metrics were evaluated in the analysis: i) velocity profile, ii) temperature profile, and iii) concentration profile. These metrics confirm the combustion reaction at the outer boundary of the porous ceramic in the burner. The spike of temperature and decrease of mass fraction of hydrogen, carbon monoxide and methane to approximately zero in the outlet exhaust confirms this study. This study was further validated by comparing results with the experimental data collected at NRC-IFCI. The results of COMSOL™ model agreed with the experimental results of NRC-IFCI.
Subjects/Keywords: 1kW diesel SOFC system
;
non-premixed feed
;
Ceramic Tail-gas burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Khan, Y. (2013). System and Component Analysis of a 1kW Diesel fuelled SOFC system
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8441
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Khan, Yasir. “System and Component Analysis of a 1kW Diesel fuelled SOFC system
.” 2013. Thesis, Queens University. Accessed March 01, 2021.
http://hdl.handle.net/1974/8441.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Khan, Yasir. “System and Component Analysis of a 1kW Diesel fuelled SOFC system
.” 2013. Web. 01 Mar 2021.
Vancouver:
Khan Y. System and Component Analysis of a 1kW Diesel fuelled SOFC system
. [Internet] [Thesis]. Queens University; 2013. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1974/8441.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Khan Y. System and Component Analysis of a 1kW Diesel fuelled SOFC system
. [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/8441
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
North Carolina State University
8.
Metzger, Brian.
Glycerol Combustion.
Degree: MS, Mechanical Engineering, 2007, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/1057
► As worldwide production of biodiesel fuel increases, one of the largest concerns is the abundance of waste glycerol. The price of crude glycerol has fallen…
(more)
▼ As worldwide production of biodiesel fuel increases, one of the largest concerns is the abundance of waste glycerol. The price of crude glycerol has fallen drastically and many large biodiesel producers are currently paying to landfill this large waste stream. In the search to find a value added alternative, glycerol combustion may be one of the simplest solutions. Heat recovered from glycerol oxidation could easily be used to reduce heating costs inherent to large-scale biodiesel production. It has been stated "Combustion of glycerol would be an elegant solution, if it worked". Clean combustion of glycerol is difficult due to its high viscosity, high auto ignition temperature, and concerns of hazardous emissions. In particular, most in the biodiesel producing community share a fear that burning glycerol could produce acrolein, an aldehyde which is a thermal decomposition product of glycerol and is toxic at very low concentrations. This report will detail the design of a
burner that can safely and easily burn crude glycerol for process heating. Emissions testing in the
burner using glycerol sources of varying quality confirm that this
burner design completely oxidizes the glycerol into CO2 and H2O with very low levels of pollutants, typical of other hydrocarbon fuels. These results show that safe, clean, and efficient combustion of a wide range of glycerol purities is possible with a properly designed
burner.
Advisors/Committee Members: Steven Peretti, Committee Member (advisor), William L. Roberts, Committee Chair (advisor), Kevin Lyons, Committee Member (advisor).
Subjects/Keywords: Glycerol; biofuel; burner; combustion; biodiesel
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Metzger, B. (2007). Glycerol Combustion. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1057
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Metzger, Brian. “Glycerol Combustion.” 2007. Thesis, North Carolina State University. Accessed March 01, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/1057.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Metzger, Brian. “Glycerol Combustion.” 2007. Web. 01 Mar 2021.
Vancouver:
Metzger B. Glycerol Combustion. [Internet] [Thesis]. North Carolina State University; 2007. [cited 2021 Mar 01].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/1057.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Metzger B. Glycerol Combustion. [Thesis]. North Carolina State University; 2007. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1057
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Toronto
9.
Zadmajid, Sina.
The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.
Degree: 2016, University of Toronto
URL: http://hdl.handle.net/1807/76157
► Bio-oil is made from pyrolysis of waste biomass, which provides a carbon-neutral combustion energy alternative. This study focuses on developing burners for use with bio-oil.…
(more)
▼ Bio-oil is made from pyrolysis of waste biomass, which provides a carbon-neutral combustion energy alternative. This study focuses on developing burners for use with bio-oil. The previous burner using bio-oil/ethanol mixtures had a small combustion chamber with no refractory lining. It was not feasible to stabilize flames of pure bio-oil and the pollutant emissions were relatively high. In this study, the burner is made more comparable to actual bio-oil burners by implementing a refractory-lined combustion chamber and increasing the size of the chamber to investigate the relationship between burner design and combustion performance of bio-oil. After making some modifications in the new burner configuration and adjusting the operating parameters, stable flames of pure bio-oil are achieved with no major nozzle coking problems, and almost no unburned hydrocarbons and low CO emissions (below 10 ppm) in the exhaust gases. The effects of operating conditions on the pollutant emissions are also investigated.
M.A.S.
Advisors/Committee Members: Thomson, Murray J, Mechanical and Industrial Engineering.
Subjects/Keywords: Bio-oil; Burner; Carbon-neutral; Combustion; Pollutant emissions; Pyrolysis; 0548
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zadmajid, S. (2016). The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/76157
Chicago Manual of Style (16th Edition):
Zadmajid, Sina. “The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.” 2016. Masters Thesis, University of Toronto. Accessed March 01, 2021.
http://hdl.handle.net/1807/76157.
MLA Handbook (7th Edition):
Zadmajid, Sina. “The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.” 2016. Web. 01 Mar 2021.
Vancouver:
Zadmajid S. The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1807/76157.
Council of Science Editors:
Zadmajid S. The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/76157
University of Toronto
10.
Zadmajid, Sina.
The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.
Degree: 2016, University of Toronto
URL: http://hdl.handle.net/1807/76225
► Bio-oil is made from pyrolysis of waste biomass, which provides a carbon-neutral combustion energy alternative. This study focuses on developing burners for use with bio-oil.…
(more)
▼ Bio-oil is made from pyrolysis of waste biomass, which provides a carbon-neutral combustion energy alternative. This study focuses on developing burners for use with bio-oil. The previous burner using bio-oil/ethanol mixtures had a small combustion chamber with no refractory lining. It was not feasible to stabilize flames of pure bio-oil and the pollutant emissions were relatively high. In this study, the burner is made more comparable to actual bio-oil burners by implementing a refractory-lined combustion chamber and increasing the size of the chamber to investigate the relationship between burner design and combustion performance of bio-oil. After making some modifications in the new burner configuration and adjusting the operating parameters, stable flames of pure bio-oil are achieved with no major nozzle coking problems, and almost no unburned hydrocarbons and low CO emissions (below 10 ppm) in the exhaust gases. The effects of operating conditions on the pollutant emissions are also investigated.
M.A.S.
Advisors/Committee Members: Thomson, Murray J, Mechanical and Industrial Engineering.
Subjects/Keywords: Bio-oil; Burner; Carbon-neutral; Combustion; Pollutant emissions; Pyrolysis; 0548
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zadmajid, S. (2016). The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/76225
Chicago Manual of Style (16th Edition):
Zadmajid, Sina. “The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.” 2016. Masters Thesis, University of Toronto. Accessed March 01, 2021.
http://hdl.handle.net/1807/76225.
MLA Handbook (7th Edition):
Zadmajid, Sina. “The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion.” 2016. Web. 01 Mar 2021.
Vancouver:
Zadmajid S. The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. [Internet] [Masters thesis]. University of Toronto; 2016. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1807/76225.
Council of Science Editors:
Zadmajid S. The Development of a New Experimental Facility for Pyrolysis Liquid Biofuel (Bio-oil) Combustion. [Masters Thesis]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/76225
Colorado State University
11.
Doyle, Jake Downin.
Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner.
Degree: MS(M.S.), Mechanical Engineering, 2013, Colorado State University
URL: http://hdl.handle.net/10217/79041
► The addition of plasma to a combustion system has the potential to increase the combustion efficiency and reduce harmful emissions by reforming hydrocarbon fuels. The…
(more)
▼ The addition of plasma to a combustion system has the potential to increase the combustion efficiency and reduce harmful emissions by reforming hydrocarbon fuels. The ability for plasma to reform fuel to create hydrogen-rich synthesis gas has been shown by other researchers. The work presented in this thesis includes the characterization of a plasma generator patented by Clean Diesel, LLC and testing an oil
burner that was modified to use the plasma generator for combustion enhancement. The plasma was generated by six electrodes with a circulating high voltage pulse created by a signal generator and high voltage transformers. The plasma is characterized through optical emission spectroscopy and with electrical measurements, where it was shown to be a non-thermal plasma operating in the glow-to-arc transition region. The plasma generator was then implemented into an oil
burner where its thermal efficiency and emissions were compared to that of a stock Riello F10
burner. Testing showed similar efficiencies for the modified and stock burners (contrary to previous testing that showed improvements due to plasma assistance). Carbon monoxide and nitrogen oxides were considered as the key pollutants, and it was shown that NOx emissions exceeded that of the stock
burner, although CO levels were reduced. Further testing was performed with additional modifications such as fuel spray type, electrode insulation, and plasma frequency, although none showed significant improvements in its operation. The results have led to the realization that a more volumetric plasma that can provide longer residence time for fuel interaction is likely needed for effective fuel reforming.
Advisors/Committee Members: Yalin, Azer (advisor), Joshi, Sachin (advisor), Marchese, Anthony (committee member), Collins, George (committee member).
Subjects/Keywords: oil burner; plasma fuel reforming; plasma assisted combustion; plasma
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Doyle, J. D. (2013). Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/79041
Chicago Manual of Style (16th Edition):
Doyle, Jake Downin. “Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner.” 2013. Masters Thesis, Colorado State University. Accessed March 01, 2021.
http://hdl.handle.net/10217/79041.
MLA Handbook (7th Edition):
Doyle, Jake Downin. “Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner.” 2013. Web. 01 Mar 2021.
Vancouver:
Doyle JD. Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner. [Internet] [Masters thesis]. Colorado State University; 2013. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10217/79041.
Council of Science Editors:
Doyle JD. Evaluation of a non-thermal plasma generator for plasma-assisted combustion in an oil burner. [Masters Thesis]. Colorado State University; 2013. Available from: http://hdl.handle.net/10217/79041
University of Adelaide
12.
Szego, George Gabriel.
Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace.
Degree: 2010, University of Adelaide
URL: http://hdl.handle.net/2440/64813
► In a world increasingly concerned with fuel prices, sustainability and the environment, energy efficiency improvements are indispensable. In this framework, Moderate or Intense Low-oxygen Dilution…
(more)
▼ In a world increasingly concerned with fuel prices, sustainability and the environment, energy efficiency improvements are indispensable. In this framework, Moderate or Intense Low-oxygen Dilution (MILD) combustion technology can
play a significant role in the mitigation of combustion-generated pollutants and greenhouse gases, whilst meeting thermal efficiency needs. Under MILD conditions, reactants are highly diluted with combustion products causing reactions to occur in a distributed reaction zone with a reduced peak temperature. As a consequence, the temperature distribution is nearly uniform, and pollutant emissions, nitrogen oxides (NOx) in particular, are lower than from conventional flames. Over the past few decades, MILD combustion technology has been implemented
at full scale in various industrial sectors and tested at pilot scale in other applications. Nevertheless, despite considerable industrial success, many important issues of MILD combustion remain unresolved. The current research seeks to characterise the MILD regime in a furnace environment burning gaseous fuels through a combined experimental and numerical modelling approach. This study describes the performance and stability characteristics of a parallel jet MILD combustion
burner system in a laboratory-scale furnace, in which the reactants and exhaust ports are all mounted on the same wall. In-furnace temperatures and global emissions are measured, respectively with fine-wire thermocouples and a gas analyser, for a wide range of operating conditions. In addition, velocities for selected cases are measured using laser Doppler anemometry (LDA). The detailed experimental data set is then used to validate a computational fluid dynamics (CFD) model. In combination, the experimental and numerical data reveal details of the passive and reactive scalar fields, and enable not only the investigation of the parameters that influence their structure and pollutant formation, but also insight into the contribution of flue gas recirculation to flame stability under MILD conditions. The present furnace/
burner configuration proved to operate without the need for external air preheating, and achieved a high degree of temperature uniformity. The analysis of the furnace aerodynamics and qualitative observations of the
burner exit region revealed that effective mixing is essential in order to increase dilution before reaction to ensure stability of this multiple jet system. Unlike in previous investigations, the fuel jet momentum is found to control the stability of this multiple jet system. The CO formation is found to be related to the mixing patterns and furnace temperature rather than reaction quenching by the heat exchanger. It is found that, although heat extraction, air preheat, excess air, firing rate, dilution, and fuel type all affect NOx emissions, they do not control NOx scaling. The combined effects of these global parameters can be ultimately characterized by a furnace temperature and a global residence time. The quantitative analysis of NOx emissions…
Advisors/Committee Members: Dally, Bassam B. (advisor), Nathan, Graham (advisor), Christo, Farid (advisor), School of Mechanical Engineering (school).
Subjects/Keywords: mild combustion; parallel jet burner; furnace; Nox scaling
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Szego, G. G. (2010). Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/64813
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Szego, George Gabriel. “Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace.” 2010. Thesis, University of Adelaide. Accessed March 01, 2021.
http://hdl.handle.net/2440/64813.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Szego, George Gabriel. “Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace.” 2010. Web. 01 Mar 2021.
Vancouver:
Szego GG. Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace. [Internet] [Thesis]. University of Adelaide; 2010. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2440/64813.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Szego GG. Experimental and numerical investigation of a parallel jet MILD combustion burner system in a laboratory-scale furnace. [Thesis]. University of Adelaide; 2010. Available from: http://hdl.handle.net/2440/64813
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Colorado
13.
Nigam, Siddharth Prashant.
Large Eddy Simulations of Industrial Burners.
Degree: MS, 2018, University of Colorado
URL: https://scholar.colorado.edu/mcen_gradetds/164
► During the past four years, a gift from 3M has funded a project that is at the intersection of academia and industry at the…
(more)
▼ During the past four years, a gift from 3M has funded a project that is at the intersection of academia and industry at the University of Colorado, Boulder (CU). The overall objective of this joint computational and experimental effort is to explore optimization and improvement of
burner/chilled-roll systems for polymer film flame treatments. Using the computational and experimental tools developed in this project, existing treatment processes will be improved and new avenues of technology innovation will be explored. In this thesis, industry-relevant heat treatment processes with catalytic and ribbon burners are studied using large eddy simulations (LES). The simulations are modeled in an open-source CFD package, OpenFOAM. Different approaches are used to model chemistry in the simulations, from a single-step global mechanism to a detailed 41-step mechanism for methane-air mixture. The combustion of methane and boundary conditions are modeled to match the experimental setup at CU. Experimental data from wavelength modulation spectroscopy are used to estimate computational parameters and test the hypothesis of additional combustion in the catalytic
burner to check whether the catalyst is working as expected. For the ribbon
burner, there is some uncertainty about the initial conditions such as the inlet jet velocity and inlet temperature. In order to estimate those parameters, an inverse modeling approach is used in a gradient-based optimization study. Additional combustion is found to occur above the catalytic
burner and initial prarmeters are estimated for the ribbon
burner. This work will provide a toolkit for researchers at 3M to produce high fidelity simulations for their heat treatment processes.
Advisors/Committee Members: Peter E. Hamlington, Gregory B. Rieker, Nicole Labbe.
Subjects/Keywords: burner; les; modeling; turbulence; combustion; Engineering; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nigam, S. P. (2018). Large Eddy Simulations of Industrial Burners. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/mcen_gradetds/164
Chicago Manual of Style (16th Edition):
Nigam, Siddharth Prashant. “Large Eddy Simulations of Industrial Burners.” 2018. Masters Thesis, University of Colorado. Accessed March 01, 2021.
https://scholar.colorado.edu/mcen_gradetds/164.
MLA Handbook (7th Edition):
Nigam, Siddharth Prashant. “Large Eddy Simulations of Industrial Burners.” 2018. Web. 01 Mar 2021.
Vancouver:
Nigam SP. Large Eddy Simulations of Industrial Burners. [Internet] [Masters thesis]. University of Colorado; 2018. [cited 2021 Mar 01].
Available from: https://scholar.colorado.edu/mcen_gradetds/164.
Council of Science Editors:
Nigam SP. Large Eddy Simulations of Industrial Burners. [Masters Thesis]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/mcen_gradetds/164
University of Cambridge
14.
Pastore, Andrea.
Syngas production from heavy liquid fuel reforming in inert porous media.
Degree: PhD, 2010, University of Cambridge
URL: http://www.dspace.cam.ac.uk/handle/1810/237704https://www.repository.cam.ac.uk/bitstream/1810/237704/2/license.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/237704/5/thesis.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/237704/6/thesis.pdf.jpg
► In the effort to introduce fuel cell technology in the field of decentralized and mobile power generators, a hydrocarbon reformer to syngas seems to be…
(more)
▼ In the effort to introduce fuel cell technology in the field of decentralized and mobile power generators, a hydrocarbon reformer to syngas seems to be the way for the market uptake. In this thesis, a potential technology is developed and investigated, in order to convert commercial liquid fuel (diesel, kerosene and biodiesel) to syngas. The fundamental concept is to oxidise the fuel in a oxygen depleted environment, obtaining hydrogen and carbon monoxide as main products of the reaction. In order to extend the flammability limit of hydrocarbon/air mixtures, the rich combustion experiments have been carried out in a two-layer porous medium combustor, which stabilises a flame at the matrix interface and recirculates the enthalpy of the hot products in order to enhance the reaction rates at ultra-rich equivalence ratio. This thesis demonstrates the feasibility of the concept, by exploring characteristic parameters for a compact, reliable and cost effective device.
Specifically, a range of equivalence ratios, thermal loads and porous materials have been examined. n-heptane was successfully reformed up to an equivalence ratio of 3, reaching a conversion efficiency (based on the lower heating value of H2 and CO over the fuel input) up to 75% for a packed bed of alumina beads. Thermal loads from P=2 to 12 kW at phi=2.0 demonstrated that heat losses can be reduced to 10%.
Similarly, diesel, kerosene and bio-diesel were reformed to syngas in a Zirconia foam burner with conversion efficiency over 60%. The effect of different burners, thermal loads and equivalence ratios have also been assessed for these commercial fuels, leading to equivalent conclusions.
A preliminary attempt to reduce the content of CO and hydrocarbons in the reformate has been also performed using commercial steam reforming and water-gas shift reaction catalysts, obtaining encouraging results. Finally, soot emission has been assessed, demonstrating particle formation for all the fuels above phi=2.0, with biodiesel showing
the lowest soot formation tendency among all the fuels tested.
Subjects/Keywords: Syngas production; Rich combustion; Porous burner; Superadiabatic combustion; Fuel reforming
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pastore, A. (2010). Syngas production from heavy liquid fuel reforming in inert porous media. (Doctoral Dissertation). University of Cambridge. Retrieved from http://www.dspace.cam.ac.uk/handle/1810/237704https://www.repository.cam.ac.uk/bitstream/1810/237704/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/6/thesis.pdf.jpg
Chicago Manual of Style (16th Edition):
Pastore, Andrea. “Syngas production from heavy liquid fuel reforming in inert porous media.” 2010. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021.
http://www.dspace.cam.ac.uk/handle/1810/237704https://www.repository.cam.ac.uk/bitstream/1810/237704/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/6/thesis.pdf.jpg.
MLA Handbook (7th Edition):
Pastore, Andrea. “Syngas production from heavy liquid fuel reforming in inert porous media.” 2010. Web. 01 Mar 2021.
Vancouver:
Pastore A. Syngas production from heavy liquid fuel reforming in inert porous media. [Internet] [Doctoral dissertation]. University of Cambridge; 2010. [cited 2021 Mar 01].
Available from: http://www.dspace.cam.ac.uk/handle/1810/237704https://www.repository.cam.ac.uk/bitstream/1810/237704/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/6/thesis.pdf.jpg.
Council of Science Editors:
Pastore A. Syngas production from heavy liquid fuel reforming in inert porous media. [Doctoral Dissertation]. University of Cambridge; 2010. Available from: http://www.dspace.cam.ac.uk/handle/1810/237704https://www.repository.cam.ac.uk/bitstream/1810/237704/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/5/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/237704/6/thesis.pdf.jpg
University of Adelaide
15.
Ho, Kenneth J.
Soot measurement and species simulation in laminar premixed flames.
Degree: 2010, University of Adelaide
URL: http://hdl.handle.net/2440/63327
► This thesis reports on the study of laminar premixed ethylene/air flat flames, in both rich and lean conditions (Ø at 1.82 to 3.80) at atmospheric…
(more)
▼ This thesis reports on the study of laminar premixed ethylene/air flat flames, in both rich and lean conditions (Ø at 1.82 to 3.80) at atmospheric pressure. The work was divided into experimental measurements of soot particles and theoretical computations of chemical products. In the experimental part, both intrusive sampling probes and non-intrusive laser diagnostics techniques were applied. The experimental measurements cover soot volume fractions by laser extinction (LE) and laser-induced incandescence (LII), temperatures by thermocouple insertion and soot morphology by thermophoretic sampling/transmission electron microscopy (TEM). The theoretical computations were performed using a detailed reaction kinetic model consisting of 544 elementary reactions among 100 chemical species to describe the formation and growth of polycyclic aromatics hydrocarbons (PAHs) up to pyrene. Results arising from this research would create a potential database, combined with visualizations, to focus as an education tool for students and researchers alike.
Two-dimensional imaging by LII revealed relatively uniform soot distributions from Ø at 1.82 to 2.22. However, annular distributions were observed for fuel-rich conditions (Ø at 2.84 to 3.80) which were elucidated to ambient air mixing due to low nitrogen shroud. The calibrated soot volume fraction profiles were in close agreement with LE for slightly sooty flames but differ by a magnitude of three for much sootier circumstances. Variable changes to the refractive index of soot, m resulted in potential errors between 3 to 11 % for soot volume fractions. Thermophoretic sampling was employed to complement the above methods. From TEM images, it was evident that soot particles undergo coagulation and aggregation and is a function of fuel equivalence. No obvious trends were seen in the particle size distribution. The effect of a low premixed reactant velocity was found to influence the magnitude and shape of the temperature profiles due to
burner plate heat transfer. Ceramic coating on thermocouple wires was demonstrated to affect estimated temperatures by 205 K. The kinetic model provided an insight into the concentration profiles of minor, intermediate and aromatic species as reported in literature. It also addressed the importance of propargyl recombination reaction (C₃H₃+C₃H₃→C₆H₆) into benzene as a fundamental step towards PAHs growth. Finally, a sensitivity analysis was carried out to tackle the influence of temperatures on chemical species.
Advisors/Committee Members: Alwahabi, Zeyad T. (advisor), Ashman, Peter John (advisor), Nathan, Graham (advisor), School of Chemical Engineering (school).
Subjects/Keywords: premixed; ethylene; laser extinction; Chemkin; chemical species; temperature; flat flame burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ho, K. J. (2010). Soot measurement and species simulation in laminar premixed flames. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/63327
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ho, Kenneth J. “Soot measurement and species simulation in laminar premixed flames.” 2010. Thesis, University of Adelaide. Accessed March 01, 2021.
http://hdl.handle.net/2440/63327.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ho, Kenneth J. “Soot measurement and species simulation in laminar premixed flames.” 2010. Web. 01 Mar 2021.
Vancouver:
Ho KJ. Soot measurement and species simulation in laminar premixed flames. [Internet] [Thesis]. University of Adelaide; 2010. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2440/63327.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ho KJ. Soot measurement and species simulation in laminar premixed flames. [Thesis]. University of Adelaide; 2010. Available from: http://hdl.handle.net/2440/63327
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
KTH
16.
Koren, Dejan.
Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner.
Degree: Mechanics, 2015, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178034
► Every computational fluid dynamics engineer deals with a never ending story – limitedcomputer resources. In computational fluid dynamics there is practically never enoughcomputer power.…
(more)
▼ Every computational fluid dynamics engineer deals with a never ending story – limitedcomputer resources. In computational fluid dynamics there is practically never enoughcomputer power. Limited computer resources lead to long calculation times which result inhigh costs and one of the main reasons is that large quantity of elements are needed in acomputational mesh in order to obtain accurate and reliable results.Although there exist established meshing approaches for the Siemens 4th generation DLEburner, mesh dependency has not been fully evaluated yet. The main goal of this work istherefore to better optimize accuracy versus cell count for this particular burner intended forsimulation of air/gas mixing where eddy-viscosity based turbulence models are employed.Ansys Fluent solver was used for all simulations in this work. For time effectivisationpurposes a 30° sector model of the burner was created and validated for the meshconvergence study. No steady state solutions were found for this case therefore timedependent simulations with time statistics sampling were employed. The mesh convergencestudy has shown that a coarse computational mesh in air casing of the burner does not affectflow conditions downstream where air/gas mixing process is taking place and that a majorpart of the combustion chamber is highly mesh independent. A large reduction of cell count inthose two parts is therefore allowed. On the other hand the RPL (Rich Pilot Lean) and thepilot burner turned out to be highly mesh density dependent. The RPL and the Pilot burnerneed to have significantly more refined mesh as it has been used so far with the establishedmeshing approaches. The mesh optimization has finally shown that at least as accurate resultsof air/gas mixing results may be obtained with 3x smaller cell count. Furthermore it has beenshown that significantly more accurate results may be obtained with 60% smaller cell count aswith the established meshing approaches.A short mesh study of the Siemens 3rd generation DLE burner in ignition stage of operationwas also performed in this work. This brief study has shown that the established meshingapproach for air/gas mixing purposes is sufficient for use with Ansys Fluent solver whilecertain differences were discovered when comparing the results obtained with Ansys Fluentagainst those obtained with Ansys CFX solver. Differences between Fluent and CFX solverwere briefly discussed in this work as identical simulation set up in both solvers producedslightly different results. Furthermore the obtained results suggest that Fluent solver is lessmesh dependent as CFX solver for this particular case.
Subjects/Keywords: CFD; Ansys; Fluent; CFX; Mesh optimization; DLE burner; Siemens; Mixing
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Koren, D. (2015). Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178034
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Koren, Dejan. “Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner.” 2015. Thesis, KTH. Accessed March 01, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178034.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Koren, Dejan. “Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner.” 2015. Web. 01 Mar 2021.
Vancouver:
Koren D. Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner. [Internet] [Thesis]. KTH; 2015. [cited 2021 Mar 01].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178034.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Koren D. Computational Fluid Dynamics Unstructured Mesh Optimization for the Siemens 4th Generation DLE Burner. [Thesis]. KTH; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178034
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Manitoba
17.
Ahmed, Mahmoud M.A.
Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames.
Degree: Mechanical Engineering, 2020, University of Manitoba
URL: http://hdl.handle.net/1993/34544
► The effect of burner geometry (central fuel nozzle, mixing tube length, and flame confinement) on the ensuing flowfield’s coherent structures (precessing vortex core and vortex…
(more)
▼ The effect of
burner geometry (central fuel nozzle, mixing tube length, and flame confinement) on the ensuing flowfield’s coherent structures (precessing vortex core and vortex shedding) and their relationship with some combustion stability parameters, such as flashback and flame front dynamics of a swirling partially premixed methane flame, is experimentally studied. In this investigation, several measurement techniques are employed. These include particle image velocimetry (PIV), Mie scattering, laser Doppler velocimetry (LDV), Bruel & Kjaer microphone, high-speed Schlieren imaging technique, and high-speed luminescence imaging. In addition, proper orthogonal decomposition (POD) is used as a post processing technique to capture the flow-field coherent structures. In the first part of the study, the effect of central nozzle geometry on coherent structures’ strength and frequency is examined inside a relatively long mixing tube. Furthermore, the relationship between the strength and frequency of coherent structures and the mean flashback region inside the mixing tube is studied. In the second part, the central nozzle geometry is modified based on the conclusions reached in the first part of the study, and its effect on the suppression of the coherent structures is investigated using a relatively short mixing length. Finally, the effect of nozzle geometries, which exhibit the highest and lowest coherent structures’ amplitude, on coherent structures and acoustics modes is studied using different mixing tube lengths in the presence of a flame confinement. The results showed that the central nozzle geometry significantly affects coherent structures’ strength and amplitude inside the mixing tube. Moreover, the results revealed a strong relationship between coherent structures’ strength and the mean flashback region inside the mixing tube. Furthermore, the central nozzle geometry is found to significantly affect the amplitude of coherent structures for both confined and unconfined swirling partial premixed flames, and acoustics for the confined flames. All in all, it can be concluded that passive techniques can be a viable strategy for mitigating combustion instabilities of partially premixed flames.
Advisors/Committee Members: Birouk, Madjid (Mechanical Engineering) (supervisor), Chatoorgoon, Vijay (Mechanical Engineering).
Subjects/Keywords: Partially premixed flame; Coherent structures; Swirl; Flashback; Burner geometry
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ahmed, M. M. A. (2020). Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/34544
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ahmed, Mahmoud M A. “Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames.” 2020. Thesis, University of Manitoba. Accessed March 01, 2021.
http://hdl.handle.net/1993/34544.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ahmed, Mahmoud M A. “Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames.” 2020. Web. 01 Mar 2021.
Vancouver:
Ahmed MMA. Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames. [Internet] [Thesis]. University of Manitoba; 2020. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1993/34544.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ahmed MMA. Experimental study of burner geometry effect on the coherent structures, flashback, and flame front dynamics of unconfined and confined partially premixed swirling methane flames. [Thesis]. University of Manitoba; 2020. Available from: http://hdl.handle.net/1993/34544
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Virginia Tech
18.
Capil, Tyler George.
Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames.
Degree: MS, Mechanical Engineering, 2017, Virginia Tech
URL: http://hdl.handle.net/10919/75121
► In this work, turbulent premixed combustion was analyzed through CH (methylidyne) planar laser induced fluorescence (PLIF). Flame topography measurements in terms of flame surface density…
(more)
▼ In this work, turbulent premixed combustion was analyzed through CH (methylidyne) planar laser induced fluorescence (PLIF). Flame topography measurements in terms of flame surface density and curvature were calculated based on the flame front detected by the CH PLIF signal. The goal of this work was to investigate turbulent flames with extremely high turbulence intensity using a recently developed HiPilot
burner (a Bunsen-type
burner). The studies were first conducted on a series of piloted jet flames to validate the methodology, and then conducted on the highly turbulent flames generated by the HiPilot
burner. All flames were controlled by combusting methane and air under a fuel to air equivalence ratio of Φ=1.05, and the Reynolds number varied from 7,385 to 28,360. Flame surface density fields and profiles for the HiPilot
burner are presented. These flame surface density measurements showed an overall decrease with height above the
burner. In addition, curvature statistics for the HiPilot flames were calculated and probability density functions of the curvature samples were determined. The probability density functions of curvature for the flames showed Gaussian-shaped distributions centered near zero curvature. To conclude, flame topography measurements were verified on jet flames and were demonstrated on the new HiPilot flames.
Advisors/Committee Members: Ma, Lin (committeechair), Deng, Weiwei (committee member), Tarazaga, Pablo Alberto (committee member).
Subjects/Keywords: flame surface density; flame curvature; CH PLIF; HiPilot burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Capil, T. G. (2017). Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/75121
Chicago Manual of Style (16th Edition):
Capil, Tyler George. “Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames.” 2017. Masters Thesis, Virginia Tech. Accessed March 01, 2021.
http://hdl.handle.net/10919/75121.
MLA Handbook (7th Edition):
Capil, Tyler George. “Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames.” 2017. Web. 01 Mar 2021.
Vancouver:
Capil TG. Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames. [Internet] [Masters thesis]. Virginia Tech; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/10919/75121.
Council of Science Editors:
Capil TG. Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames. [Masters Thesis]. Virginia Tech; 2017. Available from: http://hdl.handle.net/10919/75121
University of Texas – Austin
19.
Rechen, Ross Michael.
Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules.
Degree: MSin Engineering, Mechanical Engineering, 2011, University of Texas – Austin
URL: http://hdl.handle.net/2152/ETD-UT-2011-05-3532
► The goal of this research was to design, build and test a small burner and heat exchanger system that could be used as a source…
(more)
▼ The goal of this research was to design, build and test a small
burner and heat exchanger system that could be used as a source of heat for thermoelectric modules (TEMs) for the purpose of generating portable electric power for soldiers in the field. The project was conducted as a subcontract to Marlow Industries Inc. which was under contract from the U.S. Army. The scale of the
burner thermal output was to be in the approximate range of 2 kW of heat production and it was to be able to operate on a liquid fuel, specifically JP8. The first
burner investigated was a custom
burner designed and built at UT. It was tested with various fuel and air delivery systems. Different methods to start it, with the goal of developing an electrical starting system, were also investigated. It was capable of operating at outputs over 1 kW, but was difficult to start reliably and fuel vaporization characteristics were sensitive to operating conditions. Two commercial burners were also studied, each with somewhat different designs. One of those burners, manufactured by MSR, was chosen to be further tested in conjunction with a heat exchanger and thermoelectric modules. The performance of the thermoelectric modules used in this study was determined to be very dependent on an attached resistive load, with a peak power output occurring at approximately 3 ohms. Power output was also determined to increase linearly with increasing temperature difference between the hot and cold sides of the module. Power output followed similar trends as open circuit voltage. The temperatures of the heat exchanger across its width were very uniform, but the accuracy in centering the heat exchanger over the
burner could significantly affect temperatures. The time to reach steady state temperatures was relatively insensitive to the length of the heat exchanger. The presence of attached thermoelectric modules reduced the temperature of the heat exchangers and exhaust gas slightly. Reducing the heat exchanger length resulted in higher metal temperatures. Without cooling the cold side of the thermoelectric modules, performance increased while the system was heating up, but then dropped after reaching a peak. Cold side cooling improved thermoelectric performance by increasing its temperature difference. Active cooling with a blower and heat sink provided even better performance than passive cooling using just a heat sink at the expense of a larger parasitic load. The TEMs on the 5 inch long heat exchanger could generate 6.32 W with passive cooling, but active cooling would produce no net power. The 11 inch long heat exchanger could generate 12.8 W with passive cooling, and 16 W net could be generated with active cooling. A heat exchanger efficiency calculation showed that the 16, 11 and 5 inch long heat exchangers were about 94.4%, 93.4%, and 90.7% efficient respectively. This efficiency was defined as the ratio of the heat transferred to the heat exchanger to the heat released in the flame.
Advisors/Committee Members: Hall, M. J. (Matthew John) (advisor), Matthews, Ronald D. (committee member).
Subjects/Keywords: Burner; Heat exchanger; Thermoelectric modules; Liquid fuels; Thermoelectric generator
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rechen, R. M. (2011). Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-3532
Chicago Manual of Style (16th Edition):
Rechen, Ross Michael. “Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 01, 2021.
http://hdl.handle.net/2152/ETD-UT-2011-05-3532.
MLA Handbook (7th Edition):
Rechen, Ross Michael. “Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules.” 2011. Web. 01 Mar 2021.
Vancouver:
Rechen RM. Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3532.
Council of Science Editors:
Rechen RM. Development of a meso-scale liquid-fueled burner for electricity generation through the use of thermoelectric modules. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3532
University of Cambridge
20.
Sweeney, Mark.
Measurements of the structure of turbulent premixed and stratified methane/air flames.
Degree: PhD, 2011, University of Cambridge
URL: https://doi.org/10.17863/CAM.14010
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545397
► The influence of stratification on the structure of turbulent methane/air combustion is investigated using experimental data from laboratory scale burners: a weakly turbulent slot burner,…
(more)
▼ The influence of stratification on the structure of turbulent methane/air combustion is investigated using experimental data from laboratory scale burners: a weakly turbulent slot burner, and a higher turbulence co-annular swirl burner. The degree of stratification can be controlled independently of the overall fuel/air flow rate. The resulting measurements of scalar and velocity fields provide detailed test cases for existing and emerging turbulent flame models, covering a range of u'/sL from 1 to 10, turbulence intensities from 5% to 60%, and stratification ratios from 1 to 3. Simultaneous Rayleigh/Raman/CO-LIF measurements of temperature and major species concentrations - CH4, CO2, CO, H2, H2O and O2 - along a line are used to investigate the structure of a series of flames in both the slot and swirl burners. Concurrent cross-planar OH-PLIF allows thermal gradients to be angle corrected to their three-dimensional values. Finally, non-reacting and reacting velocity fields complete the flame database. The behavior of major species concentrations in the slot and swirl burner with respect to temperature is found to agree well on the mean with unstrained premixed laminar flame calculations. Scalar means conditioned on stoichiometry also show good agreement, aside from hydrogen which is enhanced under stratified conditions. Surface density function and scalar dissipation are lower than calculated values in all cases, suggesting that turbulence-induced thickening dominates the effect of increased strain. Metrics commonly used to derive flame surface density (FSD) were investigated. FSD may be determined using a statistical method based on measurements of temperature and its gradient, or a geometric method based on 2D temperature or LIF imaging. A third metric, an extension of the geometric method, is proposed. Good agreement is observed between the three metrics. The current database provides the first detailed high resolution scalar measurements for premixed and stratified flames. The data analysis provides insight into the physics of stratification: for the flames considered, the effects of stratification appear to be surprisingly small compared to those of turbulence, even at significant stratification ratios. The datasets provide a means of validating current and future computational turbulent combustion models.
Subjects/Keywords: 620; Combustion; Stratified; Swirl burner; Slot burner; Weaky turbulent; Turbulent; Laser diagnostics; PIV; PLIF; Flame surface density; FSD; Scalar dissipation rate; Surface density function; Flame thickness; Differential diffusion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sweeney, M. (2011). Measurements of the structure of turbulent premixed and stratified methane/air flames. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.14010 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545397
Chicago Manual of Style (16th Edition):
Sweeney, Mark. “Measurements of the structure of turbulent premixed and stratified methane/air flames.” 2011. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021.
https://doi.org/10.17863/CAM.14010 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545397.
MLA Handbook (7th Edition):
Sweeney, Mark. “Measurements of the structure of turbulent premixed and stratified methane/air flames.” 2011. Web. 01 Mar 2021.
Vancouver:
Sweeney M. Measurements of the structure of turbulent premixed and stratified methane/air flames. [Internet] [Doctoral dissertation]. University of Cambridge; 2011. [cited 2021 Mar 01].
Available from: https://doi.org/10.17863/CAM.14010 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545397.
Council of Science Editors:
Sweeney M. Measurements of the structure of turbulent premixed and stratified methane/air flames. [Doctoral Dissertation]. University of Cambridge; 2011. Available from: https://doi.org/10.17863/CAM.14010 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545397
University of Cambridge
21.
Sweeney, Mark.
Measurements of the structure of turbulent premixed and stratified methane/air flames.
Degree: PhD, 2011, University of Cambridge
URL: http://www.dspace.cam.ac.uk/handle/1810/241038https://www.repository.cam.ac.uk/bitstream/1810/241038/2/license.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/241038/3/license_url
;
https://www.repository.cam.ac.uk/bitstream/1810/241038/4/license_text
;
https://www.repository.cam.ac.uk/bitstream/1810/241038/5/license_rdf
;
https://www.repository.cam.ac.uk/bitstream/1810/241038/8/thesis.pdf.txt
;
https://www.repository.cam.ac.uk/bitstream/1810/241038/9/thesis.pdf.jpg
► The influence of stratification on the structure of turbulent methane/air combustion is investigated using experimental data from laboratory scale burners: a weakly turbulent slot burner,…
(more)
▼ The influence of stratification on the structure of turbulent methane/air combustion is investigated using experimental data from laboratory scale burners: a weakly turbulent slot burner, and a higher turbulence co-annular swirl burner. The degree of stratification can be controlled independently of the overall fuel/air flow rate. The resulting measurements of scalar and velocity fields provide detailed test cases for existing and emerging turbulent flame models, covering a range of u'/sL from 1 to 10, turbulence intensities from 5% to 60%, and stratification ratios from 1 to 3.
Simultaneous Rayleigh/Raman/CO-LIF measurements of temperature and major species concentrations - CH4, CO2, CO, H2, H2O and O2 - along a line are used to investigate the structure of a series of flames in both the slot and swirl burners. Concurrent cross-planar OH-PLIF allows thermal gradients to be angle corrected to their three-dimensional values. Finally, non-reacting and reacting velocity fields complete the flame database.
The behavior of major species concentrations in the slot and swirl burner with respect to temperature is found to agree well on the mean with unstrained premixed laminar flame calculations. Scalar means conditioned on stoichiometry also show good agreement, aside from hydrogen which is enhanced under stratified conditions. Surface density function and scalar dissipation are lower than calculated values in all cases, suggesting that turbulence-induced thickening dominates the effect of increased strain.
Metrics commonly used to derive flame surface density (FSD) were investigated. FSD may be determined using a statistical method based on measurements of temperature and its gradient, or a geometric method based on 2D temperature or LIF imaging. A third metric, an extension of the geometric method, is proposed. Good agreement is observed between the three metrics.
The current database provides the first detailed high resolution scalar measurements for premixed and stratified flames. The data analysis provides insight into the physics of stratification: for the flames considered, the effects of stratification appear to be surprisingly small compared to those of turbulence, even at significant stratification ratios. The datasets provide a means of validating current and future computational turbulent combustion models.
Subjects/Keywords: Combustion; Stratified; Swirl burner; Slot burner; Weaky turbulent; Turbulent; Laser diagnostics; PIV; PLIF; Flame surface density; FSD; Scalar dissipation rate; Surface density function; Flame thickness; Differential diffusion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sweeney, M. (2011). Measurements of the structure of turbulent premixed and stratified methane/air flames. (Doctoral Dissertation). University of Cambridge. Retrieved from http://www.dspace.cam.ac.uk/handle/1810/241038https://www.repository.cam.ac.uk/bitstream/1810/241038/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/3/license_url ; https://www.repository.cam.ac.uk/bitstream/1810/241038/4/license_text ; https://www.repository.cam.ac.uk/bitstream/1810/241038/5/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/241038/8/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/9/thesis.pdf.jpg
Chicago Manual of Style (16th Edition):
Sweeney, Mark. “Measurements of the structure of turbulent premixed and stratified methane/air flames.” 2011. Doctoral Dissertation, University of Cambridge. Accessed March 01, 2021.
http://www.dspace.cam.ac.uk/handle/1810/241038https://www.repository.cam.ac.uk/bitstream/1810/241038/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/3/license_url ; https://www.repository.cam.ac.uk/bitstream/1810/241038/4/license_text ; https://www.repository.cam.ac.uk/bitstream/1810/241038/5/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/241038/8/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/9/thesis.pdf.jpg.
MLA Handbook (7th Edition):
Sweeney, Mark. “Measurements of the structure of turbulent premixed and stratified methane/air flames.” 2011. Web. 01 Mar 2021.
Vancouver:
Sweeney M. Measurements of the structure of turbulent premixed and stratified methane/air flames. [Internet] [Doctoral dissertation]. University of Cambridge; 2011. [cited 2021 Mar 01].
Available from: http://www.dspace.cam.ac.uk/handle/1810/241038https://www.repository.cam.ac.uk/bitstream/1810/241038/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/3/license_url ; https://www.repository.cam.ac.uk/bitstream/1810/241038/4/license_text ; https://www.repository.cam.ac.uk/bitstream/1810/241038/5/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/241038/8/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/9/thesis.pdf.jpg.
Council of Science Editors:
Sweeney M. Measurements of the structure of turbulent premixed and stratified methane/air flames. [Doctoral Dissertation]. University of Cambridge; 2011. Available from: http://www.dspace.cam.ac.uk/handle/1810/241038https://www.repository.cam.ac.uk/bitstream/1810/241038/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/3/license_url ; https://www.repository.cam.ac.uk/bitstream/1810/241038/4/license_text ; https://www.repository.cam.ac.uk/bitstream/1810/241038/5/license_rdf ; https://www.repository.cam.ac.uk/bitstream/1810/241038/8/thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/241038/9/thesis.pdf.jpg
22.
Kao, Yi-Huan.
Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.
Degree: MS, Engineering and Applied Science: Aerospace
Engineering, 2012, University of Cincinnati
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342545254
► The NexGen (sonic) burner is a new burner designed by the Federal Aviation Administration (FAA) Tech Center for the required FAA fire certification tests on…
(more)
▼ The NexGen (sonic)
burner is a new
burner designed by
the Federal Aviation Administration (FAA) Tech Center for the
required FAA fire certification tests on Powerplant. The objective
of this study is to understand the performance of this
burner and
provide the benchmark to adapt the
burner setting for future FAA
fire tests. The NexGen
burner was found to satisfy the temperature
and heat flux requirements under FAA fire test guidelines. This
NexGen
burner was modified by adding four tabs to turbulator in the
current study and was found to result in wider and more uniform
flames which increase the
burner robustness for the fire test.
Calibrations of heat flux and thermocouple temperature from NexGen
burner were much more sensitive to a change in the fuel flow rate
as opposed to a change in air flow rate. However, the fire test
results on the samples were also sensitive to air flow rate. It is
recommended that both fuel and air flow rate of NexGen
burner
should be regulated in future FAA fire tests. The influence of
thermocouple size on flame calibrations and fire test results was
studied. The
burner calibrated with smaller thermocouple size will
produce less damage on the test sample. It is recommended that FAA
should have a narrower tolerance on the thermocouple size used in
the temperature calibrations. The performance of ISO gas
burner was
also studied. Heat flux produced by ISO gas
burner was found much
lower than that by NexGen
burner, and the damage induced by gas
burner in a horizontal orientation is significantly less than that
by the NexGen
burner. Fire tests were conducted on two different
sample sizes. Smaller sample could survive longer under the same
burner operating conditions. It is recommended that the sample size
should be specified in future FAA fire tests.
Advisors/Committee Members: Jeng, San-Mou (Committee Chair).
Subjects/Keywords: Aerospace Materials; fire test; NexGen burner; gas burner
…51
Figure 37: temperature profile for NexGen and gas burner on type B test sample (12… …x12”) .... 53
Figure 38: Test Sample after 20 minutes under gas burner operating… …53
IV
List of Tables
Table 1: burner performance comparison between different… …turbulators .................................. 23
Table 2: burner performance comparison between… …51
Table 10: test conditions and calibration data for sample fire test of NexGen burner…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kao, Y. (2012). Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342545254
Chicago Manual of Style (16th Edition):
Kao, Yi-Huan. “Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.” 2012. Masters Thesis, University of Cincinnati. Accessed March 01, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342545254.
MLA Handbook (7th Edition):
Kao, Yi-Huan. “Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test.” 2012. Web. 01 Mar 2021.
Vancouver:
Kao Y. Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. [Internet] [Masters thesis]. University of Cincinnati; 2012. [cited 2021 Mar 01].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342545254.
Council of Science Editors:
Kao Y. Experimental Investigation of NexGen and Gas Burner for FAA
Fire Test. [Masters Thesis]. University of Cincinnati; 2012. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342545254
23.
Osmar da Rocha Simões.
Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto.
Degree: 2012, Universidade de Taubaté
URL: http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=585
► Este trabalho apresenta um sistema Queimador Registrador de Baixas Vazões de Biogás que permite a queima de biogás em miniestações de tratamento de esgoto, em…
(more)
▼ Este trabalho apresenta um sistema Queimador Registrador de Baixas Vazões de Biogás que permite a queima de biogás em miniestações de tratamento de esgoto, em que o aproveitamento energético não é viável devido à baixa e inconstante vazão de biogás. Este sistema vai ao encontro das necessidades mundiais de redução na emissão dos gases do efeito estufa, em especial o gás metano, presente no biogás produzido por meio da digestão anaeróbica do esgoto sanitário, que é aproximadamente vinte e uma vezes mais impactante à atmosfera que o gás carbônico. O princípio se baseia no armazenamento do biogás em um gasômetro volumétrico, tipo telescópio, que depois de cheio libera o biogás que é queimado automaticamente, podendo o volume queimado ser quantificado para posterior obtenção de créditos de carbono. O sistema de controle é de baixo custo e pode ser absorvido por instalações de pequeno porte. Para que o módulo de controle tenha capacidade de monitorar e quantificar o volume de biogás queimado, foram utilizados: um sensor para detecção do nível do gasômetro cheio, um sensor para detecção do nível do gasômetro vazio, uma válvula para controle da entrada de gás e um centelhador semelhante ao utilizado em um fogão de cozinha para a queima do biogás. Também foi utilizado um contador que permite o sistema quantificar o número de vezes que o gasômetro foi esvaziado e contabilizar o volume de biogás queimado.
This work presents a system Burner Recorder Low Flows Biogas which allows the burning of biogas in sewage treatment small stations, in which the energy use is not feasible due to the low and unstable flow of biogas. This system meets the needs of global reduction in emissions of greenhouse gases, particularly methane, present in the biogas produced by the anaerobic digestion of sewage, which is approximately twenty-one times more damaging to the atmosphere than carbon dioxide. The principle is based on biogas storage in a volumetric gasometer, a kind of telescope, which after full releases biogas which is automatically burned, making it possible to be quantified to subsequently carbon credits attainment. It is a low cost system and can be absorbed by small installations. In order to enable the control module to monitor and quantify the volume of biogas burned, it was necessary to use a sensor for level detection of the full gasometer, a sensor for level detection the level of the empty gasometer, a valve to control the entry of gas and a spark-gap similar to that used in a kitchen stove for biogas burning. It was also utilized a counter which allows the system to quantify the number of times the gasometer was emptied and to measure the volume of biogas burning.
Advisors/Committee Members: Ederaldo Godoy Júnior, Márcio Abud Marcelino, José Feliciano Adami, Pedro Paulo Leite do Prado.
Subjects/Keywords: microcontrolador; biogas; ENGENHARIA MECANICA; controle; biogás; queimador de biogás; control; microcontroller; biogas burner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Simões, O. d. R. (2012). Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto. (Thesis). Universidade de Taubaté. Retrieved from http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=585
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Simões, Osmar da Rocha. “Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto.” 2012. Thesis, Universidade de Taubaté. Accessed March 01, 2021.
http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=585.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Simões, Osmar da Rocha. “Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto.” 2012. Web. 01 Mar 2021.
Vancouver:
Simões OdR. Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto. [Internet] [Thesis]. Universidade de Taubaté; 2012. [cited 2021 Mar 01].
Available from: http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=585.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Simões OdR. Queima microcontrolada de baixas e inconstantes vazões de biogás para estações de tratamento de esgoto. [Thesis]. Universidade de Taubaté; 2012. Available from: http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=585
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Michigan
24.
Skiba, Aaron.
On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence.
Degree: PhD, Aerospace Engineering, 2017, University of Michigan
URL: http://hdl.handle.net/2027.42/138725
► Developing next-generation propulsion and energy production devices that are efficient, cost-effective, and generate little to no harmful emissions will require highly-accurate, robust, yet computationally tractable…
(more)
▼ Developing next-generation propulsion and energy production devices that are efficient, cost-effective, and generate little to no harmful emissions will require highly-accurate, robust, yet computationally tractable turbulent combustion models. Models that accurately simulate turbulent premixed combustion problems are particularly important due to the fact that burning in a premixed mode can reduce exhaust emissions. A common tool employed to identify when a particular model might be more appropriate than others is the theoretical Borghi Diagram, which possesses boundaries that are meant to separate various regimes of combustion (i.e. where a particular model is superior to others). However, the derivations of these boundaries are merely based upon intuition and dimensional reasoning, rather than experimental evidence. This thesis aims to provide such evidence; furthermore, it proposes novel approaches to delineating regimes of combustion that are consistent with experimental results.
To this end, high-fidelity flame structure measurements were applied to premixed methane-air Bunsen flames subjected to extreme levels of turbulence. Specifically, 28 cases were studied with turbulence levels (u'/S
L) as high as 246, longitudinal integral length scales (L
x) as large as 43 mm, and turbulent Karlovitz (Ka
T) and Reynolds (Re
T) numbers up to 533 and 99,000, respectively. Two techniques were employed to measure the preheat and reaction layer thicknesses of these flames. One consisted of planar laser-induced fluorescence (PLIF) imaging of CH radicals, while the other involved taking the product of simultaneously acquired PLIF images of formaldehyde (CH
2O) and hydroxyl (OH) to produce ``overlap-layers." Average preheat layer thicknesses are found to increase with increasing u'/S
L and with axial distance from the
burner (x/D). In contrast, average reaction layer thicknesses did not vary appreciably with either u'/S
L or x/D. The reaction layers are also observed to remain continuous; that is, local extinction events are rarely observed. The results of this study, as well as those from prior investigations, display inconsistencies with predictions made by the theoretical Borghi Diagram. Therefore, a new Measured Regime Diagram is proposed wherein the Klimov-Williams criterion is replaced by a metric that relates the turbulent diffusivity (D
T) to the molecular diffusivity within the preheat layer (D*). Specifically, the line defined by D
T/D* ~ 180 does a substantially better job of separating thin flamelets from those with broadened preheat yet thin reaction layers (i.e. BP-TR flames). Additionally, the results suggest that the BP-TR regime extends well beyond what was previously theorized since neither broken nor broadened reaction layers were observed under conditions with Karlovitz numbers as high as 533. Overall, these efforts provide tremendous insights into the fundamental properties of extremely turbulent premixed flames. Ultimately, these insights will assist with the…
Advisors/Committee Members: Driscoll, James F (committee member), Sick, Volker (committee member), Carter, Campbell D (committee member), Gamba, Mirko (committee member), Raman, Venkatramanan (committee member).
Subjects/Keywords: Turbulent Premixed Combustion; Regime Diagram; Extreme Turbulence; Hi-Pilot Burner; Aerospace Engineering; Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Skiba, A. (2017). On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/138725
Chicago Manual of Style (16th Edition):
Skiba, Aaron. “On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence.” 2017. Doctoral Dissertation, University of Michigan. Accessed March 01, 2021.
http://hdl.handle.net/2027.42/138725.
MLA Handbook (7th Edition):
Skiba, Aaron. “On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence.” 2017. Web. 01 Mar 2021.
Vancouver:
Skiba A. On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence. [Internet] [Doctoral dissertation]. University of Michigan; 2017. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/2027.42/138725.
Council of Science Editors:
Skiba A. On the Structure of Premixed Flames Subjected to Extreme Levels of Turbulence. [Doctoral Dissertation]. University of Michigan; 2017. Available from: http://hdl.handle.net/2027.42/138725
Penn State University
25.
Boyd, Eric R.
Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
.
Degree: 2009, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/9553
► An experimental study of ignition and combustion of isolated, Ni-coated, and uncoated aluminum particles was conducted. Ni-coated Al particles are of particular interest for two…
(more)
▼ An experimental study of ignition and combustion of isolated, Ni-coated, and uncoated aluminum particles was conducted. Ni-coated Al particles are of particular interest for two reasons. The Ni-coating prevents the particles from forming agglomerates due to the protective nickel layer. Intermetallic reactions between the nickel and aluminum are exothermic, giving an additional energy feedback to start the Al particle ignition. Two particle sizes (nominally 32 μm and 9 μm in diameter) were examined in this study. Since the coated and uncoated particles are from the same batch any differences between the ignition and combustion behaviors can be directly attributed to the effect of the Ni-coating. The ignition and combustion properties of the aluminum particles were examined in the post-flame zone of a multi-diffusion flat-flame (a modified Hencken
burner) at atmospheric pressure. Isolated, single particles are burned in this experimental setup so the exothermic heating from the Ni-Al intermetallic reaction is of particular interest. This study shows that the applied nickel coating decreased the ignition temperature of the Al particles by 750 K on average for 32 m particles and by 300 K for smaller 9 m particles. These results are plotted against an effective oxidizer factor that takes into account the strength of O2, H2O, and CO2 in the oxidation reaction of aluminum. Combustion times were measured by optical techniques to determine how the applied nickel coating would affect the combustion time. While there was significant data scatter, due to a broad particle size distribution, the results still showed that the combustion times for different sized particles were not noticeably affected by Ni-coating.
Advisors/Committee Members: Kenneth K Kuo, Thesis Advisor/Co-Advisor, Kenneth K Kuo, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Nickel Coating; Gas Burner; Combustion; Aluminum
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Boyd, E. R. (2009). Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/9553
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Boyd, Eric R. “Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
.” 2009. Thesis, Penn State University. Accessed March 01, 2021.
https://submit-etda.libraries.psu.edu/catalog/9553.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Boyd, Eric R. “Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
.” 2009. Web. 01 Mar 2021.
Vancouver:
Boyd ER. Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
. [Internet] [Thesis]. Penn State University; 2009. [cited 2021 Mar 01].
Available from: https://submit-etda.libraries.psu.edu/catalog/9553.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Boyd ER. Ignition and Combustion of Nickel Coated and Uncoated Aluminum Particles in Hot Post-Flame Gas Environment
. [Thesis]. Penn State University; 2009. Available from: https://submit-etda.libraries.psu.edu/catalog/9553
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
26.
Talamantes, Gerardo.
Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications.
Degree: 2019, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/16189git5063
► Experimental testing was conducted to investigate the behavior of polyoxymethylene (POM) for consideration as the solid fuel component in an upper stage hybrid rocket engine…
(more)
▼ Experimental testing was conducted to investigate the behavior of polyoxymethylene (POM) for consideration as the solid fuel component in an upper stage hybrid rocket engine using high-density fuel and oxidizer. The regression rate of POM was experimentally measured using an opposed flow
burner to determine the influence of color, oxidizer type, and nozzle separation distance on regression rate. The experimental measurements of regression rate on POM were compared to numerical findings that were obtained using a kinetic model developed for POM combustion in a counter-flowing geometry.
It was found that natural vs. black POM does not influence the regression rate when measured in the opposed flow
burner. The numerical findings were found to be consistent with the observed trends for all strain rates showing the fuel regression rate to increase with increasing oxidizer flow velocity. However, at smaller separation distances the experimental and numerical regression rates varied due to non-uniform burning surface characteristics breaking down the 1-D assumptions of the model. Numerical calculations were also performed at pressures from 0.1 MPa to 7 MPa and showed an increase in fuel regression rate due to the momentum flux of oxidizer increasing at a greater rate than momentum flux of the fuel with pressure, thus moving the flame closer to the fuel surface. POM combustion was also compared to hydroxyl-terminated polybutadiene (HTPB) combustion and was found to have similar linear regression rates with a 50% mass flux increase of POM due to increased density.
Advisors/Committee Members: Richard A Yetter, Thesis Advisor/Co-Advisor, Stefan Thynell, Committee Member, Daniel Connell Haworth, Committee Member.
Subjects/Keywords: Solid Fuels; Polyoxymethylene; Diffusion Flame; Opposed Flow Burner; Hybrid Rockets; High-Density Fuel; POM; combustion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Talamantes, G. (2019). Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16189git5063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Talamantes, Gerardo. “Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications.” 2019. Thesis, Penn State University. Accessed March 01, 2021.
https://submit-etda.libraries.psu.edu/catalog/16189git5063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Talamantes, Gerardo. “Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications.” 2019. Web. 01 Mar 2021.
Vancouver:
Talamantes G. Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications. [Internet] [Thesis]. Penn State University; 2019. [cited 2021 Mar 01].
Available from: https://submit-etda.libraries.psu.edu/catalog/16189git5063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Talamantes G. Characterization of Polyoxymethylene as a High-Density Fuel For Use in Hybrid Rocket Applications. [Thesis]. Penn State University; 2019. Available from: https://submit-etda.libraries.psu.edu/catalog/16189git5063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Toronto
27.
Moloodi, Sina.
Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner.
Degree: 2011, University of Toronto
URL: http://hdl.handle.net/1807/31346
► Biomass fast pyrolysis liquid, also known as bio-oil, is a promising renewable fuel for heat and power generation; however, implementing crude bio-oil in some current…
(more)
▼ Biomass fast pyrolysis liquid, also known as bio-oil, is a promising renewable fuel for heat and power generation; however, implementing crude bio-oil in some current combustion systems can degrade combustion performance and emissions. In this study, optimizing fuel properties to improve combustion is considered. Various bio-oils with different fuel properties are tested in a pilot stabilized spray burner under very close flow conditions. Effects of solids, ash and water content of bio-oil as well as ethanol blending were examined. The results show the amount of solids and ash fractions of the fuel were correlated with combustion efficiency. The CO and unburned hydrocarbon emissions decreased with both water and ethanol content. Increasing the fuel’s volatile content by blending in ethanol has been shown to improve flame stability. Also, the organic fraction of particulate matter emissions was found to be a strong function of the thermogravimetric analysis residue of the fuel.
MAST
Advisors/Committee Members: Thomson, Murray J., Mechanical and Industrial Engineering.
Subjects/Keywords: combustion; biomass; pyrolysis; fuel; bio-oil; thermogravimetric analysis; emissions; ethanol; burner; particulate matter; biofuel; 0548
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moloodi, S. (2011). Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/31346
Chicago Manual of Style (16th Edition):
Moloodi, Sina. “Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner.” 2011. Masters Thesis, University of Toronto. Accessed March 01, 2021.
http://hdl.handle.net/1807/31346.
MLA Handbook (7th Edition):
Moloodi, Sina. “Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner.” 2011. Web. 01 Mar 2021.
Vancouver:
Moloodi S. Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner. [Internet] [Masters thesis]. University of Toronto; 2011. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1807/31346.
Council of Science Editors:
Moloodi S. Experimental Investigation of the Effects of Fuel Properties on Combustion Performance and Emissions of Biomass Fast Pyrolysis Liquid-ethanol Blends in a Swirl Burner. [Masters Thesis]. University of Toronto; 2011. Available from: http://hdl.handle.net/1807/31346
Université de Lorraine
28.
Dirrenberger, Patricia.
Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons.
Degree: Docteur es, Génie des procédés et des produits, 2014, Université de Lorraine
URL: http://www.theses.fr/2014LORR0035
► La vitesse de flamme adiabatique est un paramètre clé dans l'étude de la combustion d'hydrocarbures. Elle joue en effet un rôle essentiel dans le domaine…
(more)
▼ La vitesse de flamme adiabatique est un paramètre clé dans l'étude de la combustion d'hydrocarbures. Elle joue en effet un rôle essentiel dans le domaine de la combustion, dans la mesure où elle est utilisée pour valider des modèles numériques, pour construire des brûleurs, ou encore pour prédire d'éventuels retours de flamme ou souffles de la flamme. Le but de cette thèse a été d'étudier les vitesses de flammes laminaires d'un grand nombre d'hydrocarbures présents dans les gaz naturels, les essences et les gazoles. Ce travail comprend une partie expérimentale et une partie de modélisation. La partie expérimentale a permis d'enrichir les bases de données de la littérature pour différentes compositions de mélanges air/hydrocarbures. Les travaux ont été effectués sur un nouveau montage mis au point au LRGP (Laboratoire Réactions et Génie des Procédés) pour la mesure de vitesses de flammes laminaires par la méthode du flux de chaleur à l'aide d'un brûleur adiabatique à flamme plate. Cette méthode est basée sur l'équilibre des pertes thermiques nécessaires pour stabiliser la flamme par le flux de chaleur convectif allant de la surface du brûleur vers le front de flamme. Le brûleur est constitué d'une plaque perforée montée sur une chambre de mélange des gaz et la mesure de la distribution radiale de la température est réalisée grâce à une série de thermocouples. Ce montage a d'abord été utilisé à pression atmosphérique et plusieurs températures pour la mesure de vitesses de flammes de composés gazeux (alcanes, alcènes, méthane enrichi en hydrogène ou oxygène, gaz naturels, mélanges méthane-éthane et méthane-propane) et de composés liquides (alcanes, éthanol, essences commerciale et modèle additionnées ou non d'éthanol, alkylcyclohexanes, alkylbenzènes). Le montage a ensuite été placé dans une enceinte pour pouvoir travailler avec des pressions pouvant théoriquement aller jusqu'à 10 atm. Les vitesses de flammes de deux composés ont été étudiées à température ambiante et à haute pression : un composé gazeux, le méthane, jusqu'à une pression de 6 atm et un composé liquide, le n-pentane, jusqu'à une pression de 4 atm. Une étude de modélisation a complété ce travail par l'utilisation de modèles cinétiques détaillés pour la combustion des composés étudiés. Ces modèles ont été testés par la simulation des résultats expérimentaux précédemment obtenus, dans des conditions de richesse, température et pression variées
The laminar burning velocity is a key parameter in the combustion of hydrocarbons study. It plays an essential role in the combustion science area since it is used for the validation of numerical models, the design of burners or to predict potential flashback or blow off of the flame. The goal of the thesis was the study of laminar burning velocities of many hydrocarbons found in natural gases, gasolines or diesel fuels. This work includes an experimental part and a modeling part. The experimental part allowed the implementation of the literature database for different air/hydrocarbons mixtures. The experiments…
Advisors/Committee Members: Battin-Leclerc, Frédérique (thesis director), Bounaceur, Roda (thesis director).
Subjects/Keywords: Vitesse de flamme; Laminaire; Adiabatique; Hydrocarbures; Brûleur; Burning velocity; Laminar; Adiabatic; Hydrocarbons; Burner; 621.042
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dirrenberger, P. (2014). Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2014LORR0035
Chicago Manual of Style (16th Edition):
Dirrenberger, Patricia. “Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons.” 2014. Doctoral Dissertation, Université de Lorraine. Accessed March 01, 2021.
http://www.theses.fr/2014LORR0035.
MLA Handbook (7th Edition):
Dirrenberger, Patricia. “Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons.” 2014. Web. 01 Mar 2021.
Vancouver:
Dirrenberger P. Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons. [Internet] [Doctoral dissertation]. Université de Lorraine; 2014. [cited 2021 Mar 01].
Available from: http://www.theses.fr/2014LORR0035.
Council of Science Editors:
Dirrenberger P. Étude experimentale et theorique des vitesses de flammes laminaires d'hydrocarbures : Experimental and theoretical study of laminar burning velocities of hydrocarbons. [Doctoral Dissertation]. Université de Lorraine; 2014. Available from: http://www.theses.fr/2014LORR0035
University of Washington
29.
Kalia, Aman Ved.
Comparison of Sooting behavior amongst various Liquid Fuels.
Degree: 2015, University of Washington
URL: http://hdl.handle.net/1773/34042
► Hydrocarbon combustion at fuel – air equivalence ratio (φ) greater than 1 results in incomplete combustion and formation of black flaky substance, soot. Soot is…
(more)
▼ Hydrocarbon combustion at fuel – air equivalence ratio (φ) greater than 1 results in incomplete combustion and formation of black flaky substance, soot. Soot is found responsible for health ailments, global warming and degradation of combustor performance in aircrafts. The study aims at determining the sooting threshold for various fuel samples and correlation of fuel chemical composition with sooting threshold. Premixed laminar combustion of fuel samples is observed on the Meker
burner setup for varying fuel – air equivalence ratio (φ). The air flow rate and pressure are kept constant while the flow rate of liquid fuel through the plane jet atomizer assembly is varied with a flow control in – line rotameter and a constant feed pressure. By varying the fuel flow rate, φ is varied which causes changes in the flame. At rich φ , a bright yellow streak of soot is observed which vanishes when the fuel supply is reduced. This allows in determining the exact value of φ at which the sooting begins, called incipient sooting or sooting threshold. Aromatic compounds show a lower soot threshold due to their ease of forming poly – aromatic hydrocarbons which are the base constituent of soot particulate matter. In succession to aromatic compounds, dicyclic paraffins also lead to lower sooting thresholds. Iso – paraffins, cyclo – paraffins and n – paraffins have a comparatively higher sooting threshold. Experimental results show HRJ – tallow to have the highest sooting threshold with a φ of ~ 1.61 and Gevo jet blend a close second with φ ~ 1.53.
Advisors/Committee Members: Malte, Philip C (advisor).
Subjects/Keywords: aviation fuel; combustion; hydrocarbons; meker burner; premixed laminar; soot; Mechanical engineering; Chemistry; mechanical engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kalia, A. V. (2015). Comparison of Sooting behavior amongst various Liquid Fuels. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/34042
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kalia, Aman Ved. “Comparison of Sooting behavior amongst various Liquid Fuels.” 2015. Thesis, University of Washington. Accessed March 01, 2021.
http://hdl.handle.net/1773/34042.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalia, Aman Ved. “Comparison of Sooting behavior amongst various Liquid Fuels.” 2015. Web. 01 Mar 2021.
Vancouver:
Kalia AV. Comparison of Sooting behavior amongst various Liquid Fuels. [Internet] [Thesis]. University of Washington; 2015. [cited 2021 Mar 01].
Available from: http://hdl.handle.net/1773/34042.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalia AV. Comparison of Sooting behavior amongst various Liquid Fuels. [Thesis]. University of Washington; 2015. Available from: http://hdl.handle.net/1773/34042
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Iowa
30.
Kaufman, Kelsey Leigh.
Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames.
Degree: MS, Mechanical Engineering, 2014, University of Iowa
URL: https://ir.uiowa.edu/etd/4661
► Low swirl burners (LSBs) have gained popularity in heating and gas power generation industries, in part due to their proven capacity for reducing the…
(more)
▼ Low swirl burners (LSBs) have gained popularity in heating and gas power generation industries, in part due to their proven capacity for reducing the production of NOx, which in addition to reacting to form smog and acid rain, plays a central role in the formation of the tropospheric ozone layer. With lean operating conditions, LSBs are susceptible to combustion instability, which can result in flame extinction or equipment failure. Extensive work has been performed to understand the nature of LSB combustion, but scaling trends between laboratory- and industrial-sized burners have not been established. Using hydrogen addition as the primary method of flame stabilization, the current work presents results for a 2.54 cm LSB to investigate potential effects of
burner outlet diameter on the nature of flame stability, with focus on flashback and lean blowout conditions. In the lean regime, the onset of instability and flame extinction have been shown to occur at similar equivalence ratios for both the 2.54 cm and a 3.81 cm LSB and depend on the resolution of equivalence ratios incremented. Investigations into flame structures are also performed. Discussion begins with a derivation for properties in a multicomponent gas mixture used to determine the Reynolds number (Re) to develop a condition for turbulent intensity similarity in differently-sized LSBs. Based on this requirement, operating conditions are chosen such that the global Reynolds number for the 2.54 cm LSB is within 2% of the Re for the 3.81 cm
burner. With similarity obtained, flame structure investigations focus on flame front curvature and flame surface density (FSD). As flame structure results of the current 2.54 cm LSB work are compared to results for the 3.81 cm LSB, no apparent relationship is shown to exist between
burner diameter and the distribution of flame surface density. However,
burner diameter is shown to have a definite effect on the flame front curvature. In corresponding flow conditions, a decrease in
burner diameter results a broader distribution of curvature and an increased average curvature, signifying that compared to the larger 3.81 cm LSB, the flame front of the smaller
burner contains tighter, smaller scale wrinkling.
Advisors/Committee Members: Ratner, Albert (supervisor).
Subjects/Keywords: Combustion Instability; Flame Stabilization; Flame Structures; Lean; Premixed Combustion; Low Swirl Burner; NOx; Mechanical Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kaufman, K. L. (2014). Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames. (Masters Thesis). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/4661
Chicago Manual of Style (16th Edition):
Kaufman, Kelsey Leigh. “Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames.” 2014. Masters Thesis, University of Iowa. Accessed March 01, 2021.
https://ir.uiowa.edu/etd/4661.
MLA Handbook (7th Edition):
Kaufman, Kelsey Leigh. “Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames.” 2014. Web. 01 Mar 2021.
Vancouver:
Kaufman KL. Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames. [Internet] [Masters thesis]. University of Iowa; 2014. [cited 2021 Mar 01].
Available from: https://ir.uiowa.edu/etd/4661.
Council of Science Editors:
Kaufman KL. Effect of hydrogen addition and burner diameter on the stability and structure of lean, premixed flames. [Masters Thesis]. University of Iowa; 2014. Available from: https://ir.uiowa.edu/etd/4661
◁ [1] [2] [3] [4] [5] ▶
. 
Open Access Theses and Dissertations
