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Universiteit Utrecht
1.
Dekker, H.J.
The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS).
Degree: 2014, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/293789
► Purpose: To investigate the effect of increased interstitial pressure in tissue on the distribution of 165Ho microspheres after intratumoral injection. Material and methods: A dose…
(more)
▼ Purpose: To investigate the effect of increased interstitial
pressure in tissue on the distribution of 165Ho microspheres after intratumoral
injection.
Material and methods: A dose of 10 mg 165Ho-PLLA-MS (Ø 10-20 μm) was injected in falcon tubes containing soft tissue and a calibrated
pressure of respectively 0, 20, 40 and 80 mmHg. After
injection Computed Tomography (CT) was conducted on the falcon tubes for visualization of the 165Ho-PLLA-MS. Two parameters, one for absolute spreading (area of view that contained holmium) and one for three dimensional spreading where established and calculated using ImageJ software to compare the difference of distribution between the four
pressure groups.
Results: Three dimensional spreading seems to be negatively influenced by an increase of
pressure although no significant difference could be made. Absolute spreading seems not to be influenced by different
pressure values.
Conclusion/ discussion: No difference can yet be made on the effect of increased
pressure in tissue on the distribution of holmium microspheres. More research and other models are possible needed to prove a difference.
Advisors/Committee Members: Nimwegen, van, S.A..
Subjects/Keywords: holmium; interstitial fluid pressure; intratumoral injection
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APA (6th Edition):
Dekker, H. J. (2014). The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS). (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/293789
Chicago Manual of Style (16th Edition):
Dekker, H J. “The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS).” 2014. Masters Thesis, Universiteit Utrecht. Accessed April 15, 2021.
http://dspace.library.uu.nl:8080/handle/1874/293789.
MLA Handbook (7th Edition):
Dekker, H J. “The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS).” 2014. Web. 15 Apr 2021.
Vancouver:
Dekker HJ. The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS). [Internet] [Masters thesis]. Universiteit Utrecht; 2014. [cited 2021 Apr 15].
Available from: http://dspace.library.uu.nl:8080/handle/1874/293789.
Council of Science Editors:
Dekker HJ. The physiology of increased fluid pressure in tumors and its effect on intratumoral injection with Holmium-166(166HoPLLAMS). [Masters Thesis]. Universiteit Utrecht; 2014. Available from: http://dspace.library.uu.nl:8080/handle/1874/293789

University of New South Wales
2.
Bright, Courtney.
Secondary Injection Thrust Vector Control for Spacecraft Propulsion.
Degree: Engineering & Information Technology, 2019, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/64934
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63059/SOURCE02?view=true
► This thesis explores the application of secondary injection thrust vector control (SITVC) to spacecraft propulsion, where propellant consumption and system complexity are often increased by…
(more)
▼ This thesis explores the application of secondary
injection thrust vector control (SITVC) to spacecraft propulsion, where propellant consumption and system complexity are often increased by the need to maintain alignment of the thrust vector with the spacecraft centre of mass. SITVC involves transverse
injection of a secondary fluid into the main flow of a supersonic nozzle to produce a side force. While the technique has previously been studied for atmospheric vehicles with low area-ratio nozzles, this research is focussed on the performance of SITVC in high area-ratio nozzles expanding into vacuum.A two-dimensional numerical study was conducted to determine the influence of ambient
pressure on SITVC performance. Performance was strongly affected by ambient
pressure when the nozzle was overexpanded, but weakly affected when underexpanded. SITVC was modelled numerically for a three-dimensional, high area-ratio contour nozzle, where a maximum thrust vector angle of 16.4 degrees was achieved at a mass flow ratio of 0.343. The nozzle area-ratio, injector location, and injector angle were then varied to determine the effect on SITVC performance. A minor decrease in performance was observed with increasing nozzle area-ratio. SITVC efficiency was increased by moving the injector closer to the nozzle throat and by inclining it upstream, at the expense of maximum thrust vector angle.An experimental apparatus was designed to enable validation of the numerical results. The experimental results closely matched the numerical results for mass flow ratios up to 0.17, but the maximum thrust vector angle was reached at a lower mass flow ratio. These results were used to analytically model the performance of SITVC in the context of an in-orbit servicing mission, for comparison with standard reaction thrusters and mechanical thrust vector control (MTVC). SITVC was found to be more fuel efficient than reaction thrusters for the configuration studied, and was able to compensate for a much larger range of thrust misalignment. SITVC had a lower system mass than MTVC for thrust misalignments up to 9 degrees. MTVC became competitive at larger thrust misalignments, indicating a trade-off between system mass and complexity.
Advisors/Committee Members: Neely, Andrew, Engineering & Information Technology, UNSW Canberra, UNSW, Tuttle, Sean, Engineering & Information Technology, UNSW Canberra, UNSW.
Subjects/Keywords: Hypersonic; Propulsion; Injection pressure; Spacecraft; Vectoring
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APA ·
Chicago ·
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CSE |
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APA (6th Edition):
Bright, C. (2019). Secondary Injection Thrust Vector Control for Spacecraft Propulsion. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/64934 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63059/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Bright, Courtney. “Secondary Injection Thrust Vector Control for Spacecraft Propulsion.” 2019. Doctoral Dissertation, University of New South Wales. Accessed April 15, 2021.
http://handle.unsw.edu.au/1959.4/64934 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63059/SOURCE02?view=true.
MLA Handbook (7th Edition):
Bright, Courtney. “Secondary Injection Thrust Vector Control for Spacecraft Propulsion.” 2019. Web. 15 Apr 2021.
Vancouver:
Bright C. Secondary Injection Thrust Vector Control for Spacecraft Propulsion. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2021 Apr 15].
Available from: http://handle.unsw.edu.au/1959.4/64934 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63059/SOURCE02?view=true.
Council of Science Editors:
Bright C. Secondary Injection Thrust Vector Control for Spacecraft Propulsion. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/64934 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:63059/SOURCE02?view=true

Penn State University
3.
Ye, Peng.
Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/12663
► Both biodiesel fueling and changes of fuel injection pressure have significant impacts on diesel engine emissions. The investigations of their impacts on engine exhaust NOx…
(more)
▼ Both biodiesel fueling and changes of fuel
injection pressure have significant impacts on diesel engine emissions. The investigations of their impacts on engine exhaust NOx and particulate matter emissions were conducted with an 8-cylinder common-rail turbocharged direct
injection diesel engine using ultra low sulfur diesel fuel and soybean methyl ester (SME) – based biodiesel blends. The engine was running at moderate speed and different loads. Three fuel
injection parameters: start of
injection, fuel
injection pressure and fuel
injection duration were investigated to investigate their impact on engine emissions. With the control of fuel
injection strategy, it is shown in this work that the biodiesel engine NOx emission penalty can be eliminated.
A fuel spray, mixture stoichiometry field and lift-off length model was employed to explain the variations of NOx emission from biodiesel fueling and change of fuel
injection strategy. Linear correlations between the average oxygen equivalence ratio of the fuel-air mixture at the autoignition zone near the lift-off length and brake specific NOx emissions were observed for all load conditions, regardless of fuel type. This confirms that the dominant factor that determines NOx emissions is the ignition event controlled by the oxygen equivalence ratio at the autoignition zone.
The impact of late in-cylinder (post)
injection combustion with biodiesel on lubricating oil dilution was investigated in this work. It is shown that this
injection strategy could effectively decrease engine NOx emissions, while increase the CO and unburned hydrocarbon emissions. The lubricating oil dilution depends on the post
injection timing: an increase in the lubricating oil dilution can be only observed if the post
injection timing is later than 45º after top dead center.
The impacts of fuel
injection pressure on diesel and biodiesel soot morphology and oxidative reactivity were investigated. It is shown that compared with engine condition and fuel
injection pressure, biodiesel has much less significant impact on soot morphology. For soot oxidative reactivity, it is found that both diesel and biodiesel soot from higher fuel
injection pressure have higher reactivity, and biodiesel soot has higher reactivity than diesel soot when both of them are obtained from the same
injection pressure.
The optimized apparent heat release pattern for improved engine thermal efficiency was investigated with a zero-dimensional engine thermodynamic simulation. The results suggest that the optimized apparent heat release is a “wide and low” peak. The reason for this kind of heat release is that it can decrease the in-cylinder temperature and consequently decrease heat loss.
Advisors/Committee Members: Andre Louis Boehman, Dissertation Advisor/Co-Advisor, Randy Lee Vander Wal, Committee Member, Daniel Connell Haworth, Committee Member, Yaw D Yeboah, Committee Member.
Subjects/Keywords: biodiesel; engine; efficiency; emissions; fuel injection strategy; fuel injection pressure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ye, P. (2011). Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12663
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):
Ye, Peng. “Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance.” 2011. Thesis, Penn State University. Accessed April 15, 2021.
https://submit-etda.libraries.psu.edu/catalog/12663.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ye, Peng. “Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance.” 2011. Web. 15 Apr 2021.
Vancouver:
Ye P. Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Apr 15].
Available from: https://submit-etda.libraries.psu.edu/catalog/12663.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ye P. Investigation of impact of fuel injection strategy and biodiesel fueling on engine emissions and performance. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12663
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

INP Toulouse
4.
Segui Troth, Luis Miguel.
Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz.
Degree: Docteur es, Dynamique des fluides, 2017, INP Toulouse
URL: http://www.theses.fr/2017INPT0104
► La résolution d’équations différentielles de divers degrés de complexité est nécessaire afin de simuler tous les phénomènes présents dans les écoulements complexes de turbomachine et…
(more)
▼ La résolution d’équations différentielles de divers degrés de complexité est nécessaire afin de simuler tous les phénomènes présents dans les écoulements complexes de turbomachine et en particulier les effets hors équilibre qui peuvent y jouer un rôle prépondérant. Aujourd’hui, seule l’approche LES (Large Eddy Simulation) sous forme totalement compressible permet d’obtenir avec une précision satisfaisante la physique associée aux écoulements réactifs et turbulents en géométrie complexe. Le travail porte sur la modélisation numérique et physique des échanges thermiques en proche paroi. Ce travail de thèse s'est appuyé sur le projet Européen COPA-GT dédié à la simulation numérique et multi-physique d'un moteur complet.
The resolution of differential equations of diverse degree of complexity is necessary to simulate the phenomena present in the complex turbomachinery flows and in particular, requires accounting for unsteady effects that may have a preponderant role. Today, only the LES (Large Eddy Simulation) fully compressible approach has the required accuracy to predict the physics associated to reactive and turbulent flows in such complex geometries. This work covers the numerical modelling of physics in the near-wall region of a high-pressure turbine blade with special focus on thermal predictions. This work was supported by the European project COPA-GT, dedicated to the numerical multi-physics simulation of a complete gas turbine.
Advisors/Committee Members: Gicquel, Laurent (thesis director).
Subjects/Keywords: Turbine haute pression; Méthodes Numériques; Injection de turbulence; High-pressure turbine; Numerical methods; Turbulence injection
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Segui Troth, L. M. (2017). Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2017INPT0104
Chicago Manual of Style (16th Edition):
Segui Troth, Luis Miguel. “Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz.” 2017. Doctoral Dissertation, INP Toulouse. Accessed April 15, 2021.
http://www.theses.fr/2017INPT0104.
MLA Handbook (7th Edition):
Segui Troth, Luis Miguel. “Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz.” 2017. Web. 15 Apr 2021.
Vancouver:
Segui Troth LM. Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz. [Internet] [Doctoral dissertation]. INP Toulouse; 2017. [cited 2021 Apr 15].
Available from: http://www.theses.fr/2017INPT0104.
Council of Science Editors:
Segui Troth LM. Multiphysics coupled simulations of gas turbines : Simulations multiphysiques couplées de turbines à gaz. [Doctoral Dissertation]. INP Toulouse; 2017. Available from: http://www.theses.fr/2017INPT0104

University of New South Wales
5.
Bao, Yongming.
Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine.
Degree: Mechanical & Manufacturing Engineering, 2013, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53399
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12094/SOURCE02?view=true
► This study aims to clarify the spray development of ethanol, gasoline and iso-octane fuel, delivered by a multi-hole injector and spark-ignition direct-injection (SIDI) fuelling system.…
(more)
▼ This study aims to clarify the spray development of ethanol, gasoline and iso-octane fuel, delivered by a multi-hole injector and spark-ignition direct-
injection (SIDI) fuelling system. The focus is on how fuel properties and
injection pressure impact temporal and spatial evolution of sprays at various ambient conditions. Two optical facilities were used: (1) a constant-flow spray chamber simulating cold-start conditions and (2) a single-cylinder SIDI engine running at normal, warmed-up operating conditions. In these optical facilities, Mie-scattering imaging is performed to measure penetrations of spray plumes at various
injection pressures of 4, 7, 11 and 15 MPa. Experiments were first performed in the spray chamber to measure the spray tip penetration and penetration rate of ethanol, gasoline and iso-octane. It is observed that at 4 MPa
injection pressure, the tip penetration length of ethanol sprays is shorter than that of gasoline sprays, likely due to lower
injection velocity and increased nozzle loss associated with higher density and increased viscosity of ethanol, respectively. This assertion is further supported by the longest penetration length of iso-octane that has the lowest density among tested fuels and similar viscosity to gasoline. At higher
injection pressure of 7 and 11 MPa, the penetration length difference between ethanol and gasoline sprays decreases and eventually ethanol sprays show a longer penetration length than that of gasoline sprays at the highest
injection pressure of 15 MPa. This reversed trend is possibly because the penetration regime is changed such that the tip penetration is limited by aerodynamic drag force applied to fuel droplets, instead of the
injection velocity or nozzle loss of the liquid jet. It is suggested that with increasing
injection pressure, the fuel jet atomisation and droplet breakup enhance and therefore the lower aerodynamic drag associated with higher droplet size of ethanol sprays than that of gasoline sprays leads to a longer penetration length. The same trends of spray penetrations of ethanol, gasoline, and iso-octane are observed in the warmed optical engine with overall higher tip penetration length than that in the cold spray chamber primarily due to decreased air density and increased fuel temperature. In the same warmed optical engine, the effect of
injection pressure on the structural transformation of flash-boiling sprays of gasoline and ethanol is investigated for two fuel
injection timings of 90 and 300 crank angle degrees after top dead centre, corresponding to low and high ambient
pressure conditions, respectively. The macroscopic spray structure was quantified using spray tip penetrations, spray spreading angles and spray areas. From the measurements, it is found that fuel sprays injected at the earlier
injection timing, when the vapour
pressure of the fuel is higher than the ambient
pressure, show the convergence of the spray plumes towards the injector axis evidencing the flash-boiling phenomenon. By contrast, fuel injected at the later…
Advisors/Committee Members: Kook, Sanghoon, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Ethanol; Gasoline; Iso-octane fuel; Spark-ignition direct-injection (SIDI); Injection pressure; Spray; Fuel economy
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bao, Y. (2013). Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine. (Masters Thesis). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53399 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12094/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Bao, Yongming. “Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine.” 2013. Masters Thesis, University of New South Wales. Accessed April 15, 2021.
http://handle.unsw.edu.au/1959.4/53399 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12094/SOURCE02?view=true.
MLA Handbook (7th Edition):
Bao, Yongming. “Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine.” 2013. Web. 15 Apr 2021.
Vancouver:
Bao Y. Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine. [Internet] [Masters thesis]. University of New South Wales; 2013. [cited 2021 Apr 15].
Available from: http://handle.unsw.edu.au/1959.4/53399 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12094/SOURCE02?view=true.
Council of Science Editors:
Bao Y. Effect of injection pressure on ethanol and gasoline sprays in a spark-ignition direct-injection engine. [Masters Thesis]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/53399 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12094/SOURCE02?view=true

University of Toronto
6.
Shaayegan, Vahid.
Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization.
Degree: PhD, 2016, University of Toronto
URL: http://hdl.handle.net/1807/92642
► Foam injection molding (FIM) is one of the most promising manufacturing methods for thermoplastics, owing to its capability to produce low-density and lightweight products with…
(more)
▼ Foam injection molding (FIM) is one of the most promising manufacturing methods for thermoplastics, owing to its capability to produce low-density and lightweight products with high dimensional precision at fast manufacturing rates. However, achievement of a uniform fine cell structure is very challenging in this technology. The issue arises from the lack of clear understanding of cell formation mechanisms and complicated bubbles’ dynamics in FIM. Here I employed an in-situ mold visualization technique to closely and continuously monitor foaming phenomena, occurring inside the mold and during injection, in order to uncover underlying mechanisms of cell nucleation and growth in FIM. In this context, an innovative visualization mold is designed and manufactured. Using the visualization mold, I first studied cell nucleation and growth mechanisms in high-pressure FIM, and proposed the strategy of using a melt packing pressure to remove the nucleated cells during mold filling and switch nucleation mechanism from “gate-nucleation” to “shrinkage-induced” nucleation. Then, the application of a gas-counter pressure (GCP) with FIM, and cell nucleation mechanisms in this technology, was thoroughly explored. The investigation on cell nucleation and growth mechanisms was then extended to high-pressure FIM technology followed by precise mold-opening (or high expansion FIM). Inasmuch as composite thermoplastics foams comprise a large percentage of FIM parts, I extended this research to a comprehensive study on the mutual interaction of nucleated cells and carbon fibers dispersed in a polystyrene matrix in high-pressure FIM. The latter was successfully done using the designed visualization mold and the proposed high-pressure FIM protocol.
2018-11-30 00:00:00
Advisors/Committee Members: Park, Chul B, Mechanical and Industrial Engineering.
Subjects/Keywords: Conductive Polymer Composite; Foam Injection Molding; Gas-Counter Pressure; High-Pressure Foam Injection Molding; In-situ Mold Visualization; Mold-opening; 0537
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shaayegan, V. (2016). Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/92642
Chicago Manual of Style (16th Edition):
Shaayegan, Vahid. “Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization.” 2016. Doctoral Dissertation, University of Toronto. Accessed April 15, 2021.
http://hdl.handle.net/1807/92642.
MLA Handbook (7th Edition):
Shaayegan, Vahid. “Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization.” 2016. Web. 15 Apr 2021.
Vancouver:
Shaayegan V. Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization. [Internet] [Doctoral dissertation]. University of Toronto; 2016. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1807/92642.
Council of Science Editors:
Shaayegan V. Investigation of Cell Nucleation and Growth in Foam Injection Molding through Visualization. [Doctoral Dissertation]. University of Toronto; 2016. Available from: http://hdl.handle.net/1807/92642

University of Alberta
7.
Moreno Arciniegas, Laura Smith.
Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands.
Degree: MS, Department of Civil and Environmental
Engineering, 2014, University of Alberta
URL: https://era.library.ualberta.ca/files/2v23vt97s
► Solvent injection at elevated temperatures (hot solvent or steam-solvent hybrid injection) into heavy-oil/bitumen reservoirs is a promising recovery process. It increases oil mobility via oil…
(more)
▼ Solvent injection at elevated temperatures (hot
solvent or steam-solvent hybrid injection) into heavy-oil/bitumen
reservoirs is a promising recovery process. It increases oil
mobility via oil dilution, molecular diffusion, and gravity
drainage. Meanwhile, injection of light hydrocarbon solvents
creates disequilibrium between resins and asphaltene in the oil.
Then, asphaltene starts to flocculate and bond to each other in the
fluid and on the rock surface. Consequently, permeability reduction
due to pore plugging and wettability alteration may take place
affecting the underground upgrading and recovery process
negatively. In this thesis, these asphaltene related concerns
during solvent injection at different reservoir conditions were
investigated through experimental work. A combination of two
heavy-oil compositions and four solvent types were tested at
different pressure and temperatures to determine the optimal
solvent type and operational conditions minimizing the negative
effect of asphaltene. The results obtained from visual PVT cell
(testing fluid behaviour) and sandpack system (testing heavy-oil
recovery) experiments were cross-checked. The roles of solvent type
and operation conditions (mainly temperature) on the heavy-oil
recovery, wettability alteration, and pore plugging were clarified
and presented quantitatively and visually.
Subjects/Keywords: Solvent injection, permeability reduction, asphaltene
deposition, temperature and pressure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moreno Arciniegas, L. S. (2014). Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/2v23vt97s
Chicago Manual of Style (16th Edition):
Moreno Arciniegas, Laura Smith. “Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands.” 2014. Masters Thesis, University of Alberta. Accessed April 15, 2021.
https://era.library.ualberta.ca/files/2v23vt97s.
MLA Handbook (7th Edition):
Moreno Arciniegas, Laura Smith. “Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands.” 2014. Web. 15 Apr 2021.
Vancouver:
Moreno Arciniegas LS. Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands. [Internet] [Masters thesis]. University of Alberta; 2014. [cited 2021 Apr 15].
Available from: https://era.library.ualberta.ca/files/2v23vt97s.
Council of Science Editors:
Moreno Arciniegas LS. Asphaltene Precipitation During Solvent Injection at
Different Reservoir Conditions and Its Effects on Heavy-Oil
Recovery from Oilsands. [Masters Thesis]. University of Alberta; 2014. Available from: https://era.library.ualberta.ca/files/2v23vt97s

University of Michigan
8.
Medina, Mario.
Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines.
Degree: PhD, Mechanical Engineering, 2020, University of Michigan
URL: http://hdl.handle.net/2027.42/155095
► While much has been learned about gasoline direct injection sprays, there are still large gaps in the fundamental knowledge of the effects of high-pressure (over…
(more)
▼ While much has been learned about gasoline direct
injection sprays, there are still large gaps in the fundamental knowledge of the effects of high-
pressure (over 500 bar) on gasoline sprays and on the role of fuel spray/nozzle interactions on particulate emissions. Particulate emissions are a critical concern for direct fuel
injection spark-ignited engines, as future regulations may be difficult to meet without after-treatment. The objective of this dissertation was to quantitatively and qualitatively characterize fuel spray development for gasoline under engine-relevant conditions using non-intrusive optical techniques including high fuel
injection pressures and canonical studies of the effects of internal flow structures on external spray development. Two experimental facilities were used to study high-
pressure gasoline spray development and one experimental facility was used to study injector tip wetting and the effects on engine-out particulate emissions. Experiments were conducted at the University of Michigan with a constant volume chamber and diffuse backlit shadowgraph imaging for a range of chamber pressures (1 – 20 bar),
injection pressures (300 – 1500 bar), and for several canonical fuel injector nozzle geometries including different nozzle exit diameters, converging and diverging nozzles, and rounded and abrupt inlet nozzles. The images were used to measure penetration distance and rate and spray angle as a function of time for each
injection event, which are compared with results of previous experimental studies and simplified physics-based models that have been proposed in the literature. Trends in fuel spray development were similar to those observed previously for diesel sprays, which was unexpected given the significant differences in thermal-physical properties. Some abnormal spray features were identified and quantified, including spray flutter (i.e., asymmetric variation in spray angle). Injector internal flow characterization and spray development measurements were also performed at Centro Motores Termicos, an engine research division at the Universitat Politecnica de Valencia (UPV). Rate of
injection, and momentum flux, were measured using two facilities and spray development was imaged using schlieren in another facility for a range of chamber pressures (5 – 30 bar), and
injection pressures (600 – 1500 bar), and included vaporizing and non-vaporizing chamber temperatures of 400 – 800 K. The work revealed the important effect of internal flow transitions on injector performance, where nozzles with inlet rounding resulted in 20% higher mass flow rate compared with straight cylindrical nozzles. Spray momentum coefficients showed a negative trend with increased
pressure differential indicating all nozzles were cavitating under all conditions tested. Lastly, trends in measured engine-out particulate number (PN) emissions were correlated as a function of a large array of fuel injectors, multiple engine architectures, and a large parametric space of operating conditions. PN was measured directly…
Advisors/Committee Members: Wooldridge, Margaret S (committee member), Gamba, Mirko (committee member), Boehman, Andre L (committee member), Capecelatro, Jesse Samuel (committee member), Clack, Herek (committee member).
Subjects/Keywords: Fuel sprays; High pressure injection; Gasoline fuel; Mechanical Engineering; Transportation; Engineering
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APA (6th Edition):
Medina, M. (2020). Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/155095
Chicago Manual of Style (16th Edition):
Medina, Mario. “Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines.” 2020. Doctoral Dissertation, University of Michigan. Accessed April 15, 2021.
http://hdl.handle.net/2027.42/155095.
MLA Handbook (7th Edition):
Medina, Mario. “Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines.” 2020. Web. 15 Apr 2021.
Vancouver:
Medina M. Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines. [Internet] [Doctoral dissertation]. University of Michigan; 2020. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/2027.42/155095.
Council of Science Editors:
Medina M. Experimental Studies of High-pressure Gasoline Fuel Sprays for Advanced Internal Combustion Engines. [Doctoral Dissertation]. University of Michigan; 2020. Available from: http://hdl.handle.net/2027.42/155095

Texas A&M University
9.
Czernia, Bartosz Tadeusz.
Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.
Degree: MS, Petroleum Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173744
► A mechanistic model was created to calculate recovery factors and capillary pressure curves for unconventional reservoirs. A key aspect of the model is that it…
(more)
▼ A mechanistic model was created to calculate recovery factors and capillary
pressure curves for unconventional reservoirs. A key aspect of the model is that it accounts for the effect of fluid confinement that occurs inside small diameter pores in unconventional reservoirs. Confinement effects are incorporated through the calculation of capillarity via the Young-Laplace equation. The model is intended to provide an estimate of recovery factors that is faster and simpler to use than a full reservoir simulation. The model simulates initial depletion of the reservoir and then simulates one or more gas
injection steps as an enhanced oil recovery technique. The results from the model are unique to the specific reservoir fluid composition, pore size distribution, degree of depletion,
injection gas composition,
injection gas amount and number of
injection steps specified for the run. The results from the model are compared against small-scale reservoir simulation runs under equivalent conditions. The simulator used for the comparison is a Matlab based, compositional research simulator that is capable of modeling pore confinement effects.
For an idealized reservoir model, the mechanistic model and the reservoir simulation results match for both the initial depletion and gas
injection portions of the run. For larger reservoir models containing a greater number of cells, the mechanistic model matches the simulation results closely for the initial depletion. However, the two methods do not match for the gas
injection portion of the run. This mismatch occurs
because the mechanistic model is not capable of modeling the complex mixing of the
injection gas with the reservoir fluids as the gas moves through the reservoir volume.
To isolate the impact of confinement on production, each reservoir simulation is run once with confinement effects considered and again using bulk fluid behavior (no confinement effects). All other run parameters are held constant between the runs. For a black oil reservoir fluid, the confinement effects increase the ratio of oil to gas production. For a volatile oil, confinement has a minimal impact on the ratio of oil to gas production.
Advisors/Committee Members: Barrufet, Maria A (advisor), Blasingame, Thomas A (committee member), Lee, William J (committee member).
Subjects/Keywords: Unconventional; Recovery Factors; Depletion; Gas Injection; Capillary Pressure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Czernia, B. T. (2018). Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173744
Chicago Manual of Style (16th Edition):
Czernia, Bartosz Tadeusz. “Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.” 2018. Masters Thesis, Texas A&M University. Accessed April 15, 2021.
http://hdl.handle.net/1969.1/173744.
MLA Handbook (7th Edition):
Czernia, Bartosz Tadeusz. “Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.” 2018. Web. 15 Apr 2021.
Vancouver:
Czernia BT. Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1969.1/173744.
Council of Science Editors:
Czernia BT. Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173744

Texas A&M University
10.
Czernia, Bartosz Tadeusz.
Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.
Degree: MS, Petroleum Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173839
► A mechanistic model was created to calculate recovery factors and capillary pressure curves for unconventional reservoirs. A key aspect of the model is that it…
(more)
▼ A mechanistic model was created to calculate recovery factors and capillary
pressure curves for unconventional reservoirs. A key aspect of the model is that it accounts for the effect of fluid confinement that occurs inside small diameter pores in unconventional reservoirs. Confinement effects are incorporated through the calculation of capillarity via the Young-Laplace equation. The model is intended to provide an estimate of recovery factors that is faster and simpler to use than a full reservoir simulation. The model simulates initial depletion of the reservoir and then simulates one or more gas
injection steps as an enhanced oil recovery technique. The results from the model are unique to the specific reservoir fluid composition, pore size distribution, degree of depletion,
injection gas composition,
injection gas amount and number of
injection steps specified for the run. The results from the model are compared against small-scale reservoir simulation runs under equivalent conditions. The simulator used for the comparison is a Matlab based, compositional research simulator that is capable of modeling pore confinement effects.
For an idealized reservoir model, the mechanistic model and the reservoir simulation results match for both the initial depletion and gas
injection portions of the run. For larger reservoir models containing a greater number of cells, the mechanistic model matches the simulation results closely for the initial depletion. However, the two methods do not match for the gas
injection portion of the run. This mismatch occurs
because the mechanistic model is not capable of modeling the complex mixing of the
injection gas with the reservoir fluids as the gas moves through the reservoir volume.
To isolate the impact of confinement on production, each reservoir simulation is run once with confinement effects considered and again using bulk fluid behavior (no confinement effects). All other run parameters are held constant between the runs. For a black oil reservoir fluid, the confinement effects increase the ratio of oil to gas production. For a volatile oil, confinement has a minimal impact on the ratio of oil to gas production.
Advisors/Committee Members: Barrufet, Maria A (advisor), Blasingame, Thomas A (committee member), Lee, William J (committee member).
Subjects/Keywords: Unconventional; Recovery Factors; Depletion; Gas Injection; Capillary Pressure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Czernia, B. T. (2018). Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173839
Chicago Manual of Style (16th Edition):
Czernia, Bartosz Tadeusz. “Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.” 2018. Masters Thesis, Texas A&M University. Accessed April 15, 2021.
http://hdl.handle.net/1969.1/173839.
MLA Handbook (7th Edition):
Czernia, Bartosz Tadeusz. “Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection.” 2018. Web. 15 Apr 2021.
Vancouver:
Czernia BT. Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1969.1/173839.
Council of Science Editors:
Czernia BT. Development of a Mechanistic Model for Capillary Pressures and Relative Permeabilities to Estimate Oil and Gas Recoveries for Unconventional Reservoirs Under Depletion and Gas Injection. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173839

Texas A&M University
11.
Sesetty, Varahanaresh.
Simulation of Hydraulic Fractures and their Interactions with Natural Fractures.
Degree: MS, Petroleum Engineering, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11872
► Modeling the stimulated reservoir volume during hydraulic fracturing is important to geothermal and petroleum reservoir stimulation. The interaction between a hydraulic fracture and pre-existing natural…
(more)
▼ Modeling the stimulated reservoir volume during hydraulic fracturing is important to geothermal and petroleum reservoir stimulation. The interaction between a hydraulic fracture and pre-existing natural fractures exerts significant control on stimulated volume and fracture network complexity. This thesis presents a boundary element and finite difference based method for modeling this interaction during hydraulic fracturing process. In addition, an improved boundary element model is developed to more accurately calculate the total stimulated reservoir volume.
The improved boundary element model incorporates a patch to calculate the tangential stresses on fracture walls accurately, and includes a special crack tip element at the fracture end to capture the correct stress singularity the tips The fracture propagation model couples fluid flow to fracture deformation, and accounts for fracture propagation including the transition of a mechanically-closed natural fractures to a hydraulic fracture.
The numerical model is used to analyze a number of stimulation scenarios and to study the resulting hydraulic fracture trajectory, fracture aperture, and pressures as a function of
injection time. The
injection pressure, fracture aperture profiles shows the complexity of the propagation process and its impact on stimulation design and proppant placement. The
injection pressure is observed to decrease initially as hydraulic fracture propagates and then it either increases or decreases depending on the factors such as distance between hydraulic fracture and natural fracture, viscosity of the injected fluid,
injection rate and also other factor that are discussed in detail in below sections.
Also, the influence of flaws on natural fracture in its opening is modeled. Results shows flaws that are very small in length will not propagate but are influencing the opening of natural fracture. If the flaw is located near to one end tip the other end tip will likely propagate first and vice versa. This behavior is observed due to the stress shadowing effect of flaw on the natural fracture.
In addition, sequential and simultaneous
injection and propagation of multiple fractures is modeled. Results show that for sequential
injection, the
pressure needed to initiate the later fractures increases but the geometry of the fractures is less complicated than that obtained from simultaneous
injection under the same fracture spacing and
injection. It is also observed that when mechanical interaction is present, the fractures in sequential fracturing have a higher width reduction as the later fractures are formed
Advisors/Committee Members: Ghassemi, Ahmad (advisor), Valko, Peter (committee member), Kinra, Vikram (committee member).
Subjects/Keywords: Hydaulic fracture; Natural Fracture; Injection pressure; Propagation; Proppant; Fluid flow
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sesetty, V. (2012). Simulation of Hydraulic Fractures and their Interactions with Natural Fractures. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11872
Chicago Manual of Style (16th Edition):
Sesetty, Varahanaresh. “Simulation of Hydraulic Fractures and their Interactions with Natural Fractures.” 2012. Masters Thesis, Texas A&M University. Accessed April 15, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11872.
MLA Handbook (7th Edition):
Sesetty, Varahanaresh. “Simulation of Hydraulic Fractures and their Interactions with Natural Fractures.” 2012. Web. 15 Apr 2021.
Vancouver:
Sesetty V. Simulation of Hydraulic Fractures and their Interactions with Natural Fractures. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11872.
Council of Science Editors:
Sesetty V. Simulation of Hydraulic Fractures and their Interactions with Natural Fractures. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11872

Michigan Technological University
12.
Zhu, Xiucheng.
HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION.
Degree: PhD, Department of Mechanical Engineering-Engineering Mechanics, 2019, Michigan Technological University
URL: https://digitalcommons.mtu.edu/etdr/923
► With nearly smokeless combustion, Dimethyl Ether (DME) can be pressurized and used as a liquid fuel for compression-ignition (CI) combustion. However, due to its…
(more)
▼ With nearly smokeless combustion, Dimethyl Ether (DME) can be pressurized and used as a liquid fuel for compression-ignition (CI) combustion. However, due to its lower heating value and liquid density compared with diesel fuel, DME has a smaller energy content per unit volume. To obtain an equivalent energy content of diesel, approximately 1.86 times more quantity of DME is required. This can be addressed by a larger nozzle size or higher
injection pressure. However, the effect of high
injection pressure on DME spray combustion characteristics have not yet been well understood. In order to fill this gap, spray and combustion processes of DME were studied extensively via a series of experiments in a constant-volume and optically accessible combustion vessel. In the current study, a hydraulic electric unit injector (HEUI) with a 180 µm single-hole nozzle was driven by an oil-pressurized fuel
injection (FI) system to achieve
injection pressure of 1500 bar. The liquid and vapor regions of DME jet were visualized using a hybrid Schlieren/Mie scattering at non-reacting conditions. At reacting conditions, high-speed natural flame luminosity of DME combustion was used to capture the flame intensity, and planar laser-induced fluorescence (PLIF) imaging was used to characterize CH
2O evolution. Spray and combustion characteristics of DME were compared with diesel in terms of rate of
injection (ROI), liquid/vapor penetration and, ignition delay. Flame lift-off length (LOL), flame structure, and formaldehyde (CH
2O) formation of DME were also studied through high-speed imaging. The RANS Converge CFD simulation was validated against the experimental and used as a powerful tool to explore the DME spray characteristics under various conditions. Further insights into DME spray and flame structure were obtained through experimentally validated Large Eddy Simulations (LES) simulations.
Advisors/Committee Members: Seong-Young Lee.
Subjects/Keywords: DME; ignition; combustion; high injection pressure; Heat Transfer, Combustion
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhu, X. (2019). HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION. (Doctoral Dissertation). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etdr/923
Chicago Manual of Style (16th Edition):
Zhu, Xiucheng. “HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION.” 2019. Doctoral Dissertation, Michigan Technological University. Accessed April 15, 2021.
https://digitalcommons.mtu.edu/etdr/923.
MLA Handbook (7th Edition):
Zhu, Xiucheng. “HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION.” 2019. Web. 15 Apr 2021.
Vancouver:
Zhu X. HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION. [Internet] [Doctoral dissertation]. Michigan Technological University; 2019. [cited 2021 Apr 15].
Available from: https://digitalcommons.mtu.edu/etdr/923.
Council of Science Editors:
Zhu X. HIGH INJECTION PRESSURE DME IGNITION AND COMBUSTION PROCESSES: EXPERIMENT AND SIMULATION. [Doctoral Dissertation]. Michigan Technological University; 2019. Available from: https://digitalcommons.mtu.edu/etdr/923

Michigan Technological University
13.
Nazemi, Mohammadreza.
MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION.
Degree: MS, Department of Mechanical Engineering-Engineering Mechanics, 2015, Michigan Technological University
URL: https://digitalcommons.mtu.edu/etds/956
► Homogeneous Charge Compression Ignition (HCCI) and Premixed Charge Compression Ignition (PCCI) combustion strategies are promising methods for achieving low engine-out NOx and soot emissions…
(more)
▼ Homogeneous Charge Compression Ignition (HCCI) and Premixed Charge Compression Ignition (PCCI) combustion strategies are promising methods for achieving low engine-out NOx and soot emissions as well as high indicated efficiency. However, these combustion strategies have difficulties with controlling the rate of heat release and lack of an adequate combustion phasing control mechanism. A dual-fuel Reactivity Controlled Compression Ignition (RCCI) combustion strategy will address these issues due to the existence of precise means for controlling the heat release rate and combustion phasing. In the RCCI strategy two fuels with different reactivity (auto-ignition characteristics, e.g., gasoline and diesel) are blended inside the combustion chamber. Combustion phasing is controlled by the relative ratios of these two fuels and the combustion duration is controlled by the local equivalence ratio gradient between the two fuels. This thesis focuses on development of RCCI engine combustion model and understanding the effects of key parameters controlling RCCI engine combustion. This thesis includes three major modeling and analysis contributions.
In the first part, a computationally efficient modeling platform is developed and validated against the experimental data. The model is able to predict start of combustion (SOC) with average error around 1 Crank Angle Degree (CAD). However, due to premixed nature of air-fuel mixture and considering the whole combustion chamber as one uniform zone, the model over predicts peak in-cylinder
pressure and therefore is not capable of predicting crank angle for 50 percent mass of fuel burned (CA50) and Burn Duration (BD). Proper operation of RCCI engines requires an in-depth understanding of the interactions between fluid flows, turbulent mixing and chemical kinetics. In the second part of this thesis, a detailed 3D/Computational Fluid Dynamics (CFD) combustion model in commercial CFD code called CONVERGE is developed and validated against experimental data. In-cylinder
pressure trace, combustion phasing and emissions (e.g., NOx, HC and CO) are shown to be in good agreement with experimental data for different operating conditions.
In the last part, the effects of fuel
injection system parameters on the performance and emissions characteristics of an RCCI engine are discussed. The
injection system parameters include Premixed Ratio (PR),
injection pressure, Start of
Injection (SOI) timing and spray angle. The CFD model is then used to suggest an
injection strategy capable of achieving optimized RCCI engine operation.
Advisors/Committee Members: Mahdi Shahbakhti.
Subjects/Keywords: CFD; Combustion; Injection pressure; RCCI; SOI; Spray angle; Automotive Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nazemi, M. (2015). MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etds/956
Chicago Manual of Style (16th Edition):
Nazemi, Mohammadreza. “MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION.” 2015. Masters Thesis, Michigan Technological University. Accessed April 15, 2021.
https://digitalcommons.mtu.edu/etds/956.
MLA Handbook (7th Edition):
Nazemi, Mohammadreza. “MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION.” 2015. Web. 15 Apr 2021.
Vancouver:
Nazemi M. MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION. [Internet] [Masters thesis]. Michigan Technological University; 2015. [cited 2021 Apr 15].
Available from: https://digitalcommons.mtu.edu/etds/956.
Council of Science Editors:
Nazemi M. MODELING AND ANALYSIS OF REACTIVITY CONTROLLED COMPRESSION IGNITION (RCCI) COMBUSTION. [Masters Thesis]. Michigan Technological University; 2015. Available from: https://digitalcommons.mtu.edu/etds/956

Brno University of Technology
14.
Ostřížek, Petr.
Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/15396
► In this work we are studied possibitities of preparing of metalic nanowires by using template methods. Second part of this work was design of simple…
(more)
▼ In this work we are studied possibitities of preparing of metalic nanowires by using template methods. Second part of this work was design of simple electrolytical cell for electrochemical deposition of nanostructures through polycarbonate membrane. Finally, we are tried to prepare metalic nanowires via
pressure injection.
Advisors/Committee Members: Škoda, David (advisor), Čechal, Jan (referee).
Subjects/Keywords: elektrochemická depozice; tlaková injektáž; nanodráty; electrochemical deposition; pressure injection; nanowires
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ostřížek, P. (2019). Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/15396
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):
Ostřížek, Petr. “Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition.” 2019. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/15396.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ostřížek, Petr. “Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition.” 2019. Web. 15 Apr 2021.
Vancouver:
Ostřížek P. Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/15396.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ostřížek P. Příprava kovových nanodrátů elektrochemickou depozicí: Fabrication of Metallic Nanowires by Electrochemical Deposition. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/15396
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
15.
Chi, Tzi-Chieh.
LED-based thermographic phosphorescence imaging in a diesel engine environment.
Degree: Mechanical & Manufacturing Engineering, 2019, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/64865
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:62804/SOURCE02?view=true
► A significant efficiency loss in combustion engines occurs due to heat transfer through the combustion chamber wall, accounting for 20~30 % of total fuel energy.…
(more)
▼ A significant efficiency loss in combustion engines occurs due to heat transfer through the combustion chamber wall, accounting for 20~30 % of total fuel energy. This study presents a novel method developed for two-dimensional measurements of wall surface temperature using thermophosphorescence imaging. The experiments were performed in a constant-volume combustion chamber wherein the ambient gas and fuel
injection conditions closely mimicked a typical diesel engine. The proposed method successfully made use of a high-power LED system and ICCD camera, which offers practical advantages such as lower cost and reduced safety concerns in comparison to laser-based phosphorescence diagnostics. The study first investigated how phosphorescence signals were influenced by the coating thickness. Using a scanning electron microscope (SEM) the optimal layer thickness was chosen as ~14 µm, the thinnest possible layer capable of achieving peak emission signal – as thicker coatings are more prone to thermal gradients. The results obtained both before and after the flame impingement on the wall indicate effective wall temperature measurements with low spatial (pixel-by-pixel) and shot-to-shot variations of < 7.5 K (95% confidence). The newly developed phosphorescence imaging was applied for the wall surface temperature measurements directly after flame-wall interaction with variation in
injection pressure. The wall temperature immediately after flame impingement was measured highest at 130 MPa (468 ±0.8 K) due to high flame temperature caused by enhanced air entrainment and air/fuel mixing. However, the 70 MPa
injection pressure also resulted in high wall temperature (464 ±0.9 K) due to longer flame/wall interaction at a fixed
injection duration condition. The lowest wall temperature immediately after flame-wall interaction was the 100 MPa
injection pressure case (454 ±0.7 K) due to lower flame temperature than the 130 MPa
injection and shorter flame/wall interaction than the 70 MPa
injection case. Based on these data, this thesis characterised heat transfer in the combustion chamber wall through analysing local heat flux measurements, which was used to propose a modified Woschni heat transfer correlation. Three main modifications were made including: a new characteristic length, temperature exponent, and engine specific constant, which were successfully validated against measured wall temperature regardless of
injection pressure.
Advisors/Committee Members: Kook, Shawn, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Hawkes, Evatt, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Phosphorescence diagnostics; Thermographic phosphorescence; Injection pressure; Heat Transfer; Woschni correlation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Chi, T. (2019). LED-based thermographic phosphorescence imaging in a diesel engine environment. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/64865 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:62804/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Chi, Tzi-Chieh. “LED-based thermographic phosphorescence imaging in a diesel engine environment.” 2019. Doctoral Dissertation, University of New South Wales. Accessed April 15, 2021.
http://handle.unsw.edu.au/1959.4/64865 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:62804/SOURCE02?view=true.
MLA Handbook (7th Edition):
Chi, Tzi-Chieh. “LED-based thermographic phosphorescence imaging in a diesel engine environment.” 2019. Web. 15 Apr 2021.
Vancouver:
Chi T. LED-based thermographic phosphorescence imaging in a diesel engine environment. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2021 Apr 15].
Available from: http://handle.unsw.edu.au/1959.4/64865 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:62804/SOURCE02?view=true.
Council of Science Editors:
Chi T. LED-based thermographic phosphorescence imaging in a diesel engine environment. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/64865 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:62804/SOURCE02?view=true

Delft University of Technology
16.
Chang, Kelly (author).
Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:154af986-f9d5-40d3-a9bf-487b9545a730
► Biogas is the well-known product of Anaerobic Digestion (AD), but nowadays, the intermediate products (volatile fatty acids - VFAs) of anaerobic metabolism have gained increasing…
(more)
▼ Biogas is the well-known product of Anaerobic Digestion (AD), but nowadays, the intermediate products (volatile fatty acids - VFAs) of anaerobic metabolism have gained increasing attention inside the “carboxylate platform”. However, steering and optimizing the process for selective metabolite production is still an unraveled task inside this field since it relies on the manipulation of operational parameters. The objective is to understand the conversion of glucose and glycerol in the mixed culture of anaerobic digestion to unravel possibilities to steer product formation. Glucose and glycerol are the main components in the waste streams of beverage and biodiesel industries. Regarding the degradation pathways in AD, both glucose and glycerol are oxidized to pyruvate by fermentative bacteria to obtain energy and metabolic intermediates under anaerobic conditions through the same intermediate, glyceraldehyde-3-phosphate. Pyruvate, the key branching-point, allows the process to enter different metabolic pathways which lead to the formation of various metabolites. Under the fermentation conditions, redox balance is necessary to be maintained through terminal electron transfer to internally produced compounds. Since glycerol has a higher degree of reduction than glucose (Glucose: 0.33 NADH/C-Glucose; Glycerol: 0.66 NADH/C-Glycerol), the conversion of glycerol into pyruvate generates a double amount of reducing equivalents. On the one hand, this provides the advantage of higher theoretical product yield of reduced compounds. On the other hand, half of the glucose is lost as CO2 during the fermentation, and this reduces the product yield.1 Therefore, we assume that elevated pCO2 could have a more significant detrimental effect on glucose fermentation. In this research, batch experiments at different pCO2 (0.3, 1, 3, 5, 8 bar) were performed, and different types of measurements and analyses were employed to monitor the pCO2 effect on the metabolism. We designed some of the potential pathways of glucose and glycerol conversion under elevated pCO2. The elevated pCO2 converged the product spectrum of both substrates towards propionate production but affected the degradation and production phase of propionate and acetate. Initial pCO2 of 0.3 bar and 1 bar did not cause visible inhibition on the propionate production of both substrates. However, the propionate degradation was kinetically affected under 0.3 and 1 bar initial pCO2. Although propionate was degradable, its degradation phase at 1 bar initial pCO2 was longer than 0.3 bar. On the contrary, when the pCO2 was elevated to 3, 5, and 8 bar, not only the propionate production phase became longer, but also the maximum concentration became lower on both substrates. Moreover, propionate degradation was ceased. The lower propionate production was suspected to be due to the inhibition of NADH production as a consequence of the elevated pCO2 effect. The undegradable propionate might be attributed to unfavored decarboxylation reactions under elevated pCO2. The enrichment approach…
Advisors/Committee Members: Lindeboom, Ralph (mentor), Ceron Chafla, Pamela (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: High-pressure anaerobic digestion; Resource recovery; CO2 injection
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chang, K. (. (2019). Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:154af986-f9d5-40d3-a9bf-487b9545a730
Chicago Manual of Style (16th Edition):
Chang, Kelly (author). “Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture.” 2019. Masters Thesis, Delft University of Technology. Accessed April 15, 2021.
http://resolver.tudelft.nl/uuid:154af986-f9d5-40d3-a9bf-487b9545a730.
MLA Handbook (7th Edition):
Chang, Kelly (author). “Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture.” 2019. Web. 15 Apr 2021.
Vancouver:
Chang K(. Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://resolver.tudelft.nl/uuid:154af986-f9d5-40d3-a9bf-487b9545a730.
Council of Science Editors:
Chang K(. Steering product formation In high-pressure anaerobic systems: The effect of elevated pCO2 on the degradation of glucose and glycerol by a mixed culture. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:154af986-f9d5-40d3-a9bf-487b9545a730
17.
Ragu, R.
Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -.
Degree: Mechanical Engineering, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/26347
► Global interest in increasing the usage of alternative fuels in internal combustion engines continues to be strong due to environmental concerns and the limited availability…
(more)
▼ Global interest in increasing the usage of
alternative fuels in internal combustion engines continues to be
strong due to environmental concerns and the limited availability
of conventional fossil fuel in future Latest interest has focused
on the use of bio derived fuels in diesel engines Vegetable oils
and their derivatives are alternative diesel fuels and rice bran
oil is one of the most important oil in terms of availability
Keeping this in mind a research work has been carried out to
investigate the effect of injection timing and injection pressure
on a diesel engine with rice bran vegetable oil In the present
research the effect of injection timing and injection pressure on
performance and emission parameters of a direct injection diesel
engine fueled with preheated rice bran vegetable oil is
investigated Experiments are conducted on a single cylinder four
stroke air cooled direct injection and 4 4 kW compression ignition
engine The performance and emission level of diesel engine are
studied at different loads by using the fuels like diesel rice bran
oil rice bran biodiesel derived from rice bran vegetable oil and
preheated rice bran oil It is observed that viscosity of rice bran
oil is equal to that of diesel when heated at 158 C and also equal
to that of rice bran based biodiesel when heated at 137 C
newline
References p.176-184
Advisors/Committee Members: Ramadoss, G.
Subjects/Keywords: Alternative fuels; Diesel engine; Injection timing and injection pressure; Internal combustion engine; Mechanical engineering; Rice bran vegetable oil
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ragu, R. (2014). Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/26347
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):
Ragu, R. “Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -.” 2014. Thesis, Anna University. Accessed April 15, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/26347.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ragu, R. “Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -.” 2014. Web. 15 Apr 2021.
Vancouver:
Ragu R. Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 15].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26347.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ragu R. Experimental investigation on effect of injection timing
and injection pressure on a stationary direct injection diesel
engine fueled with preheated rice bran vegetable oil; -. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/26347
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Rutard, Nicolas.
Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion.
Degree: Docteur es, Énergétique, 2019, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2019SACLC088
► L’occurrence d'instabilités de combustion de haute fréquence au sein des moteurs-fusées à ergols liquides peut s'avérer dommageable pour l'intégrité des systèmes propulsifs. Par conséquent, les…
(more)
▼ L’occurrence d'instabilités de combustion de haute fréquence au sein des moteurs-fusées à ergols liquides peut s'avérer dommageable pour l'intégrité des systèmes propulsifs. Par conséquent, les acteurs du spatial souhaitent renforcer leur compréhension des mécanismes à l'origine de ces instabilités. Pour cela, la simulation numérique s'est révélée au fil du temps de plus en plus attractive. Dans le cas particulier d'un fonctionnement en régime subcritique, le comburant se trouve à l'état liquide dans la chambre de combustion. Pour reproduire fidèlement les écoulements associés à ce régime de fonctionnement, la simulation numérique doit pouvoir restituer les mécanismes d'interaction entre les perturbations acoustiques et le processus d'atomisation de la phase liquide, car ils peuvent influencer la stabilité de la combustion. Dans cette optique, cette étude consiste 1) à mettre en place une méthodologie de simulation numérique de jet diphasique atomisé sous excitation acoustique, 2) à valider la restitution de l'ensemble des mécanismes de réponse du jet aux ondes acoustiques, et 3) à s'appuyer sur les résultats des simulations pour progresser vers une meilleure compréhension des phénomènes physiques mis en jeu. La stratégie de simulation utilisée est basée sur le couplage entre une méthode à interface diffuse à 4 équations pour simuler le gaz et les plus grosses structures liquides de l'écoulement, et une approche statistique Eulérienne pour modéliser le spray de gouttes. Dans ces travaux, la simulation numérique d'un jet diphasique atomisé soumis à une excitation acoustique de haute amplitude montre une bonne restitution de l'aplatissement du cœur liquide et de son influence sur le processus d'atomisation du jet. Notamment, le cœur liquide est raccourci et le spray s'élargit dans la direction orthogonale à l'axe de propagation acoustique. Un couplage important d'ores et déjà observé expérimentalement entre le système d'injection et la cavité acoustique ainsi que son influence sur le processus d'atomisation de la phase liquide sont également reproduits. Enfin, une modélisation simplifiée de l'écoulement destinée à compléter les résultats des simulations révèle une déviation progressive du cœur liquide, et donc des gouttes issues de son atomisation, par la force de radiation acoustique. Ces travaux ouvrent ainsi la voie à des simulations réactives capables de reproduire fidèlement le comportement de flammes diphasiques sous perturbation acoustique en vue d'en étudier l'impact sur la stabilité de la combustion.
The occurrence of high-frequency combustion instabilities in liquid-propellant rocket engines can be detrimental to propulsion systems. Consequently, space actors need to strengthen their understanding of the mechanisms that cause these instabilities. To this end, numerical simulation has become more and more attractive over time. Under subcritical operating conditions, the oxidizer inside the combustion chamber is in a liquid state. In such a case, numerical simulation must be able to reproduce every…
Advisors/Committee Members: Ducruix, Sébastien (thesis director).
Subjects/Keywords: Instabilités de combustion; Régime subcritique; LES; Injection coaxiale; Pression de radiation; Combustion instabilities; Subcritical conditions; LES; Coaxial injection; Radiation pressure
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rutard, N. (2019). Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2019SACLC088
Chicago Manual of Style (16th Edition):
Rutard, Nicolas. “Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion.” 2019. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed April 15, 2021.
http://www.theses.fr/2019SACLC088.
MLA Handbook (7th Edition):
Rutard, Nicolas. “Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion.” 2019. Web. 15 Apr 2021.
Vancouver:
Rutard N. Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2019. [cited 2021 Apr 15].
Available from: http://www.theses.fr/2019SACLC088.
Council of Science Editors:
Rutard N. Simulation numérique et modélisation de l'influence d'ondes acoustiques de haute amplitude sur un jet diphasique : application au domaine de la propulsion fusée à ergols liquides : Numerical simulation and modelling of the influence of high-amplitude acoustic waves on a two-phase jet : application to the field of liquid-propellant rocket propulsion. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2019. Available from: http://www.theses.fr/2019SACLC088

University of Colorado
19.
Brown, Megan Rose Mary.
Mechanisms and Mitigation of Injection-Induced Earthquakes.
Degree: PhD, 2019, University of Colorado
URL: https://scholar.colorado.edu/geol_gradetds/162
► Injection-induced seismicity caused by wastewater injection is a continuing problem for the central and eastern United States. Mitigation of induced earthquakes often focuses on…
(more)
▼ Injection-induced seismicity caused by wastewater
injection is a continuing problem for the central and eastern United States. Mitigation of induced earthquakes often focuses on operational parameters like
injection rate. While pore
pressure increase has been the main mechanism invoked in
injection-induced seismicity, other mechanisms like Coulomb static stress transfer may play a role. In this dissertation, I examine the mechanisms of
injection –induced earthquakes in relation to mitigation. I investigate the role of aggregate
injection rate, the combined
injection rate of multiple wells, by modeling pore
pressure increase caused by 22 wastewater disposal wells injecting into the same disposal zone within 30 km of seismicity in Greeley, Colorado. I find that the wells 15 – 30 km from the seismicity contribute approximately 44% of pore
pressure increase at the location of the earthquakes. Therefore, aggregate
injection rate and well spacing is important when planning mitigation strategies. I also derive a simple relation between pore
pressure change and surface deformation that can be used to constrain hydraulic parameters of confined aquifers to a first-order. This relation can estimate expected surface deformation associated with pore
pressure model results, which can then be compared to observed surface deformation using geodetic techniques. I validate this relation by constraining the storativity of an aquifer in Texas that experienced uplift associated with wastewater disposal. Finally, I investigate the role of small magnitude earthquakes in induced seismicity. I use generic models to test if small magnitude earthquakes can cumulatively transfer, through earthquake interactions, stress of a magnitude comparable to pore
pressure increase from wastewater
injection. I find that the stress caused by earthquake interactions (Coulomb static stress transfer) is comparable in magnitude to pore
pressure increase. However, the area influenced by the increased stress is much smaller than in pore
pressure diffusion. This means that earthquake interactions may induce more earthquakes though over a smaller area than pore
pressure increase. If earthquake interactions induce additional events, reduction in
injection rate or even shutting down a well may not mitigate seismicity. Therefore, earthquake interactions should be taken into account when planning mitigation, especially the timing of mitigation measures.
Advisors/Committee Members: Shemin Ge, Anne F. Sheehan, Kristy F. Tiampo, David A. Budd, Jonathan W. Godt.
Subjects/Keywords: earthquake interactions; injection-induced earthquakes; injection-induced seismicity; mitigation; pore pressure modeling; wastewater disposal; Geology; Hydrology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brown, M. R. M. (2019). Mechanisms and Mitigation of Injection-Induced Earthquakes. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/geol_gradetds/162
Chicago Manual of Style (16th Edition):
Brown, Megan Rose Mary. “Mechanisms and Mitigation of Injection-Induced Earthquakes.” 2019. Doctoral Dissertation, University of Colorado. Accessed April 15, 2021.
https://scholar.colorado.edu/geol_gradetds/162.
MLA Handbook (7th Edition):
Brown, Megan Rose Mary. “Mechanisms and Mitigation of Injection-Induced Earthquakes.” 2019. Web. 15 Apr 2021.
Vancouver:
Brown MRM. Mechanisms and Mitigation of Injection-Induced Earthquakes. [Internet] [Doctoral dissertation]. University of Colorado; 2019. [cited 2021 Apr 15].
Available from: https://scholar.colorado.edu/geol_gradetds/162.
Council of Science Editors:
Brown MRM. Mechanisms and Mitigation of Injection-Induced Earthquakes. [Doctoral Dissertation]. University of Colorado; 2019. Available from: https://scholar.colorado.edu/geol_gradetds/162

Brno University of Technology
20.
Kovářová, Lucie.
Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/60164
► Bachelor thesis about "Fuel injection pumps for diesel engines," deals with fuel injection pumps for diesel engines and their development. The goal of this thesis…
(more)
▼ Bachelor thesis about "Fuel
injection pumps for diesel engines," deals with fuel
injection pumps for diesel engines and their development. The goal of this thesis is to describe and explain the principle of fuel
injection pumps and to categorize them according to their design solution. The categorization begins with the first historical usage of fuel
injection pump and ends by outlining the future usage of this technology.
Advisors/Committee Members: Píštěk, Václav (advisor), Beran, Martin (referee).
Subjects/Keywords: Vstřikovací čerpadlo; vznětový motor; vstřikovací tlak; dávka paliva; Injection pump; diesel engine; fuel injection pressure; fuel delivery
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kovářová, L. (2019). Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60164
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):
Kovářová, Lucie. “Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines.” 2019. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/60164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kovářová, Lucie. “Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines.” 2019. Web. 15 Apr 2021.
Vancouver:
Kovářová L. Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/60164.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kovářová L. Palivová vstřikovací čerpadla vznětových motorů: Fuel injection pumps for diesel engines. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/60164
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
21.
Palikhel, Dinesh Raj.
Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion.
Degree: M.S. in Engineering Science, Mechanical Engineering, 2011, University of Mississippi
URL: https://egrove.olemiss.edu/etd/1328
► Injection pultrusion is an efficient and highly automated continuous process for high-quality, low-cost, high-volume manufacturing of composites. The main objective of this study is…
(more)
▼ Injection pultrusion is an efficient and highly automated continuous process for high-quality, low-cost, high-volume manufacturing of composites. The main objective of this study is to analyze "attached die configuration" and "detached die configuration" for the better
injection pultrusion process. In this work the impact of various processing parameters on complete wet out of composite parts is investigated in the attached die and detached die
injection pultrusion with various chamber length considerations. The various processing parameters considered are pull speed, fiber volume fraction, resin viscosity,
injection port location and compression ratio. 3-D finite volume technique is used to simulate the liquid resin flow through the fiber reinforcement in the
injection pultrusion process. The purpose of the present work is to investigate the resin
injection pressure needed to achieve complete wet-out, the corresponding maximum
pressure inside the resin
injection chamber and to predict the resin flow front by varying the length of
injection chamber for different processing parameters.
Advisors/Committee Members: Jeffrey A Roux, Jagdish Sharma, Arunachalam Rajendran.
Subjects/Keywords: 3 D Finite Volume; Numerical Model; attached die and detached die; injection pressure; maximum chamber wall pressure; Processing parameters; Pull Speed; Fiber Volume Fraction; Viscosity; resin injection pultrusion; Mechanical Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Palikhel, D. R. (2011). Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion. (Thesis). University of Mississippi. Retrieved from https://egrove.olemiss.edu/etd/1328
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):
Palikhel, Dinesh Raj. “Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion.” 2011. Thesis, University of Mississippi. Accessed April 15, 2021.
https://egrove.olemiss.edu/etd/1328.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Palikhel, Dinesh Raj. “Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion.” 2011. Web. 15 Apr 2021.
Vancouver:
Palikhel DR. Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion. [Internet] [Thesis]. University of Mississippi; 2011. [cited 2021 Apr 15].
Available from: https://egrove.olemiss.edu/etd/1328.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Palikhel DR. Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion. [Thesis]. University of Mississippi; 2011. Available from: https://egrove.olemiss.edu/etd/1328
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Florida
22.
Yaquian-Luna, Jose A.
Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills.
Degree: MS, Environmental Engineering Sciences, 2012, University of Florida
URL: https://ufdc.ufl.edu/UFE0044307
► Development of liquid addition systems is a crucial factor in the improvement of bioreactor landfill technology. Research on this topic aims to improve liquids distribution…
(more)
▼ Development of liquid addition systems is a crucial factor in the improvement of bioreactor landfill technology. Research on this topic aims to improve liquids distribution within the landfill, while operating it under safe conditions. More homogenously distributed liquids will lead to higher decomposition rates of the degradable fraction of the waste, and will increase in landfill gas generation which consequently generates gains in airspace.
Advisors/Committee Members: Townsend, Timothy G (committee chair), Annable, Michael D (committee member), Bloomquist, David G (committee member).
Subjects/Keywords: Bedding; Bioreactors; Cell lines; Flow velocity; Fluids; Landfills; Liquids; Pressure; Water injection; Water pressure; bioreactor – fluid-conductance – horizontal-injection-lines – landfill – leachate – leachate-recirculation – whole-tires; City of Gainesville ( local )
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yaquian-Luna, J. A. (2012). Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills. (Masters Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0044307
Chicago Manual of Style (16th Edition):
Yaquian-Luna, Jose A. “Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills.” 2012. Masters Thesis, University of Florida. Accessed April 15, 2021.
https://ufdc.ufl.edu/UFE0044307.
MLA Handbook (7th Edition):
Yaquian-Luna, Jose A. “Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills.” 2012. Web. 15 Apr 2021.
Vancouver:
Yaquian-Luna JA. Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills. [Internet] [Masters thesis]. University of Florida; 2012. [cited 2021 Apr 15].
Available from: https://ufdc.ufl.edu/UFE0044307.
Council of Science Editors:
Yaquian-Luna JA. Evaluation of Whole Waste Tires as Bedding Media for Liquid Injection Lines in Municipal Solid Waste Landfills. [Masters Thesis]. University of Florida; 2012. Available from: https://ufdc.ufl.edu/UFE0044307

Purdue University
23.
Feddema, Rick Thomas.
Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors.
Degree: MSME, Mechanical Engineering, 2013, Purdue University
URL: http://docs.lib.purdue.edu/open_access_theses/12
► Feddema, Rick T. M.S.M.E., Purdue University, December 2013. Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl…
(more)
▼ Feddema, Rick T. M.S.M.E., Purdue University, December 2013. Effect of Aviation Fuel Type and Fuel
Injection Conditions on the Spray Characteristics of
Pressure Swirl and Hybrid Air Blast Fuel Injectors. Major Professor: Dr. Paul E. Sojka, School of Mechanical Engineering
Spray performance of
pressure swirl and hybrid air blast fuel injectors are central to combustion stability, combustor heat management, and pollutant formation in aviation gas turbine engines. Next generation aviation gas turbine engines will optimize spray atomization characteristics of the fuel injector in order to achieve engine efficiency and emissions requirements.
Fuel injector spray atomization performance is affected by the type of fuel injector, fuel liquid properties, fuel
injection pressure, fuel
injection temperature, and ambient
pressure. Performance of
pressure swirl atomizer and hybrid air blast nozzle type fuel injectors are compared in this study. Aviation jet fuels, JP-8, Jet A, JP-5, and JP-10 and their effect on fuel injector performance is investigated. Fuel injector set conditions involving fuel injector
pressure, fuel temperature and ambient
pressure are varied in order to compare each fuel type.
One objective of this thesis is to contribute spray patternation measurements to the body of existing drop size data in the literature. Fuel droplet size tends to increase with decreasing fuel
injection pressure, decreasing fuel
injection temperature and increasing ambient
injection pressure. The differences between fuel types at particular set conditions occur due to differences in liquid properties between fuels. Liquid viscosity and surface tension are identified to be fuel-specific properties that affect the drop size of the fuel.
An open aspect of current research that this paper addresses is how much the type of aviation jet fuel affects spray atomization characteristics. Conventional aviation fuel specifications are becoming more important with new interest in alternative fuels. Optical patternation data and line of sight laser diffraction data show that there is significant difference between jet fuels. Particularly at low fuel
injection pressures (0.345 MPa) and cold temperatures (-40 C), the patternation data shows that the total surface area in the spray at 38.1 mm from the
pressure swirl injector for the JP-10 fuel type is one-sixth the amount of the JP-8.
Finally, this study compares the atomizer performance of a
pressure swirl nozzle to a hybrid air blast nozzle. The total surface area for both the hybrid air blast nozzle and the
pressure swirl nozzle show a similar decline in atomization performance at low fuel
injection pressures and cold temperatures. However, the optical patternator radial profile data and the line of sight laser diffraction data show that the droplet size and spray distribution data are less affected by
injection conditions and fuel type in the hybrid air blast nozzle, than they are in the
pressure swirl nozzle. One explanation is that the aerodynamic forces…
Advisors/Committee Members: Paul E. Sojka, Robert P. Lucht, Timothee L. Pourpoint.
Subjects/Keywords: Ambient Pressure; Aviation Fuel; Fuel Injector; Injection Temperature; Pressure Swirl; Twin Fluid; Aerospace Engineering; Mechanical Engineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Feddema, R. T. (2013). Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors. (Thesis). Purdue University. Retrieved from http://docs.lib.purdue.edu/open_access_theses/12
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):
Feddema, Rick Thomas. “Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors.” 2013. Thesis, Purdue University. Accessed April 15, 2021.
http://docs.lib.purdue.edu/open_access_theses/12.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Feddema, Rick Thomas. “Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors.” 2013. Web. 15 Apr 2021.
Vancouver:
Feddema RT. Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors. [Internet] [Thesis]. Purdue University; 2013. [cited 2021 Apr 15].
Available from: http://docs.lib.purdue.edu/open_access_theses/12.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Feddema RT. Effect of Aviation Fuel Type and Fuel Injection Conditions on the Spray Characteristics of Pressure Swirl and Hybrid Air Blast Fuel Injectors. [Thesis]. Purdue University; 2013. Available from: http://docs.lib.purdue.edu/open_access_theses/12
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology
24.
Sikora, Ondřej.
Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/60129
► The bachelor’s thesis has been created as a study on the development of fuel injection systems for diesel engines. The first part deals with the…
(more)
▼ The bachelor’s thesis has been created as a study on the development of fuel
injection systems for diesel engines. The first part deals with the fuel system, which describes the preparation of fuel mixture. There are brief descriptions of individual system components and explains their functions. The main part deals with the
injection device, which describes the specific technical solutions used in the past and in the present. Each system is discussed from a construction point of view and its functions. The last chapter describes the contemporary development of
injection systems associated with complications and limitations.
Advisors/Committee Members: Píštěk, Václav (advisor), Beran, Martin (referee).
Subjects/Keywords: vysokotlaké čerpadlo; vstřikovač; tryska; vstřikovací tlak; Common Rail; high-pressure pump; injector; nozzle; injection pressure; Common Rail
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sikora, O. (2019). Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60129
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):
Sikora, Ondřej. “Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems.” 2019. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/60129.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sikora, Ondřej. “Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems.” 2019. Web. 15 Apr 2021.
Vancouver:
Sikora O. Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/60129.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sikora O. Vývoj vstřikovacích systémů vznětových motorů: Development of diesel engine injection systems. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/60129
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech
25.
Zhang, Kaiyi.
CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs.
Degree: MS, Mining Engineering, 2019, Virginia Tech
URL: http://hdl.handle.net/10919/93728
► The new technologies to recover unconventional resources in oil and gas industry, such as fracturing and horizontal drilling, boosted the production of shale gas and…
(more)
▼ The new technologies to recover unconventional resources in oil and gas industry, such as fracturing and horizontal drilling, boosted the production of shale gas and tight oil in 21st century and contributed to the North America oil and gas production. Although the new technologies and strong demand spiked the production of tight oil resources, there are still unknowns of oil and gas flow mechanisms in tight rock reservoirs. As we know, the oil and gas resources are stored in the pores of reservoir formation rock. During production process, the oil and gas are pushed into production wells by formation
pressure. However, the pore radius of shale rock is extremely small (around nanometers), which reduces the flow rate of oil and gas and raises capillary
pressure in pores. The high capillary
pressure will alter the oil and gas phase behavior and it may influence the value of minimum miscibility
pressure (MMP), which is an important design parameter for CO2
injection (an important technology to raise production). To investigate this influence, we changed classical model with considering capillary
pressure and this modified model is implemented in different methods to calculate MMP. The results show that CO2 -MMP in shale reservoirs are affected by capillary
pressure and the results from different methods match well. Moreover, in tight rock reservoirs, the heterogeneous pore size distribution, such as fractures in reservoirs, may affect the flow of oil and gas and MMP value. So, this work also investigates the effect of pore size heterogeneity on oil and gas flow mechanisms. According to the simulation results, compositional gradient forms in heterogeneous nanopores of tight reservoirs and this gradient will cause diffusion which will dominate the other fluid flow mechanisms. Therefore, we always need to consider molecular diffusion in the simulation model for shale reservoirs.
Advisors/Committee Members: Nojabaei, Bahareh (committeechair), Boreyko, Jonathan B. (committee member), Ripepi, Nino S. (committee member).
Subjects/Keywords: Pore Confinement Effect; Gas-oil Capillary Pressure; CO2 Injection; Minimum Miscibility Pressure; Shale Nano-pore; Pore Size Heterogeneity; Molecular Diffusion
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, K. (2019). CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/93728
Chicago Manual of Style (16th Edition):
Zhang, Kaiyi. “CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs.” 2019. Masters Thesis, Virginia Tech. Accessed April 15, 2021.
http://hdl.handle.net/10919/93728.
MLA Handbook (7th Edition):
Zhang, Kaiyi. “CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs.” 2019. Web. 15 Apr 2021.
Vancouver:
Zhang K. CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/10919/93728.
Council of Science Editors:
Zhang K. CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/93728

Louisiana State University
26.
Wang, Yanfang.
An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice.
Degree: PhD, Complex Fluids, 2020, Louisiana State University
URL: https://digitalcommons.lsu.edu/gradschool_dissertations/5430
► Foam is one of the most common used multiphase fluid in Underbalanced Drilling (UBD) and Managed Pressure Drilling (MPD). Because of its low density,…
(more)
▼ Foam is one of the most common used multiphase fluid in Underbalanced Drilling (UBD) and Managed Pressure Drilling (MPD). Because of its low density, high capacity of lifting and carrying cuttings, low cost and compatibility with formations, foam has become more superior than the conventional drilling mud when depleted reservoir pressure, severe lost circulation, or unstable borehole are encountered. In general, the success of foam applications rely on the understanding of the fundamentals of foam rheology in downhole conditions.
Foam rheology has been studied for decades. Conventional foam rheological models such as Power Law, Bingham Plastic, Herschel-Bulkley to explain foam behavior usually fail to interpret the monitored circulating pressure changes in operation, not to mention foam behaviors in downhole. Understanding bubble size and foam texture impacts at different foam quality ranges in the foam model development become very significant.
A new foam rheological model based on Low-Quality Regime (LQR) and High-Quality Regime (HQR) behaviors is developed. This new model, which originally came from comprehensive foam flow experiments, together with the visualization of foam texture and bubble distribution, is proved to be easily and conveniently implemented for industry use in this study. The model requires nine model parameters – three (uwRef, ugRef,DPRef) to define the transition region, four to capture Power-Law rheology in both HQR and LQR (KH, nH, KL, nL), and two to describe the sensitivity of steady-state pressure drops as a function of gas and liquid velocities in both regimes (mH, mL). With the newly developed foam model, we apply it in the following two foam applications in petroleum industry, in which the foam rheology and foam handling are the main concerns for successes.
First of all, a foam drilling and wellbore clean-up application with foam is investigated. These scenarios consider foam circulation into 10000 ft long wells at different inclination angles with a long vertical, inclined, or horizontal trajectory. The results are compared with two existing foam modeling techniques, so-called Chen et al.’s model (based on the correlations for wet foams only) and Edrisi and Kam’s model (based on wet- and dry-foam rheological properties with five model parameters). The conclusions show that, with or without formation fluid influx, the new foam model demonstrates the robustness of the new modeling technique in all scenarios capturing foam flow characteristics better, whenever the situation forms stable fine-textured foams or unstable coarse-textured foams.
Second, foam-assisted mud cap drilling for gas migration situation, which simulatesthe process with accurate foam characteristics when foams are used to suppress gas kicks under certain well and fluid conditions, is presented. The new foam model with Two Flow Regimes is used throughout the simulation process. The results…
Subjects/Keywords: Foam modeling; Foam flow in wellbore; Foam drilling; Gas kick; Maximal injection pressure; Managed pressure drilling
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, Y. (2020). An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice. (Doctoral Dissertation). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_dissertations/5430
Chicago Manual of Style (16th Edition):
Wang, Yanfang. “An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice.” 2020. Doctoral Dissertation, Louisiana State University. Accessed April 15, 2021.
https://digitalcommons.lsu.edu/gradschool_dissertations/5430.
MLA Handbook (7th Edition):
Wang, Yanfang. “An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice.” 2020. Web. 15 Apr 2021.
Vancouver:
Wang Y. An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice. [Internet] [Doctoral dissertation]. Louisiana State University; 2020. [cited 2021 Apr 15].
Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/5430.
Council of Science Editors:
Wang Y. An Improved Foam Modeling Technique and Its Application to Petroleum Drilling and Production Practice. [Doctoral Dissertation]. Louisiana State University; 2020. Available from: https://digitalcommons.lsu.edu/gradschool_dissertations/5430

Brno University of Technology
27.
Mikulík, David.
Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/31478
► The work deals with optimization of the technological mode of injection moulding of test specimens 1A of semicrystalline PP and amorphous PS. It also explores…
(more)
▼ The work deals with optimization of the technological mode of
injection moulding of test specimens 1A of semicrystalline PP and amorphous PS. It also explores the influence of technological mode changes on the crystallinity of a semi-crystalline PP. Was set the reference technological mode for each of the polymers and subsequently changed the value of the
injection temperature, mold temperature, the volume when you switch to holding
pressure,
injection and holding
pressure. After relaxation of
injection for time 24 h, and the mouldings and dogbones were weighed and thickness were measured at selected points. From the dogbones made of PP samples were taken for differential scanning calorimetry (DSC) and crystallinity was examined. From the observed weight and thickness of dogbones were determined optimal technological modes for semi-crystalline PP and amorphous PS. Examining the influence of technological change modes on the crystallinity showed no clear dependence. Furthermore, it was found that the processing of a semicrystalline PP
injection moulding reduces the value of crystallinity of the polymer, compare to starting PP granulate.
Advisors/Committee Members: Kučera, František (advisor), Přikryl, Radek (referee).
Subjects/Keywords: injekční vstřikování; vstřikovací tlak; vstřikovací dotlak; teplota formy; vstřikovací teplota; bod přepnutí; hmotnost; smrštění; krystalinita; injection moulding; injection pressure; injection holding pressure; mould temperature; injection temperature; switching point; weight; shrinkage; crystallinity
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mikulík, D. (2019). Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/31478
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):
Mikulík, David. “Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics.” 2019. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/31478.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mikulík, David. “Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics.” 2019. Web. 15 Apr 2021.
Vancouver:
Mikulík D. Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/31478.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mikulík D. Technologie injekčního vstřikování termoplastů: Injection moulding technology of thermoplastics. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/31478
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology
28.
Thistle, Andrew G.
Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry.
Degree: MS, Mechanical Engineering, 2016, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9254
► To better understand atomization in a commercial aviation gas turbine combustion environment, we present experimental measurements of the internal fuel flow of a simplex…
(more)
▼ To better understand atomization in a commercial aviation gas turbine combustion environment, we present experimental measurements of the internal fuel flow of a simplex atomizer. Particle Image Velocimetry was used to measure velocity in a plane axial to the flow internal to a standard aerospace fuel atomizer. The geometry studied used a 0.74mm orifice and is typical of a commercial aircraft engine. MIL PRF-7024 was employed as the working fluid and two mass flow rates were studied. Particle Image Velocimetry data on a small simplex atomizer was collected and methods are detailed including the machining of the optically clear spin chamber, which properly replicates atomizer geometry, and challenges associated with seeding MIL PRF-7024. The method of data collection is discussed for future application to other geometries. Flow fields showed the majority of mass flowrate around the air core. In addition to increased understanding of this complex flow, this data may be used to support and validate computational analyses of gas turbine fuel
injection.
Advisors/Committee Members: Steven W. Day.
Subjects/Keywords: atomization; gas turbine fuel injection; particle image velocimetry; PIV; pressure swirl atomizer; spray
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Thistle, A. G. (2016). Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9254
Chicago Manual of Style (16th Edition):
Thistle, Andrew G. “Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry.” 2016. Masters Thesis, Rochester Institute of Technology. Accessed April 15, 2021.
https://scholarworks.rit.edu/theses/9254.
MLA Handbook (7th Edition):
Thistle, Andrew G. “Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry.” 2016. Web. 15 Apr 2021.
Vancouver:
Thistle AG. Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry. [Internet] [Masters thesis]. Rochester Institute of Technology; 2016. [cited 2021 Apr 15].
Available from: https://scholarworks.rit.edu/theses/9254.
Council of Science Editors:
Thistle AG. Measurement of Flow Velocities in a To-Scale Simplex Atomizer Using Particle Image Velocimetry. [Masters Thesis]. Rochester Institute of Technology; 2016. Available from: https://scholarworks.rit.edu/theses/9254

University of Newcastle
29.
Bhuiyan, Mohammad Zahidul Islam.
Experimental study of pressure grouted soil nail system.
Degree: PhD, 2020, University of Newcastle
URL: http://hdl.handle.net/1959.13/1415529
► Research Doctorate - Doctor of Philosophy (PhD)
Soil nailing is a reinforcement technique, used to reinforce in situ ground to stabilize it more effectively and…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
Soil nailing is a reinforcement technique, used to reinforce in situ ground to stabilize it more effectively and economically, in which the reinforcing slender elements (typically steel bars), called soil nails, are inserted into a soil mass by different installation methods such as driving, jacking or pre-drilling. The nailing technique is extensively applied for slopes, excavations and retaining walls. Conventionally, frictional soil nails (e.g., driven, drilled and grouted nails) are commonly used in practice, based on the soil conditions, project cost and construction flexibility, and the pullout resistance of the frictional nails primarily comes from the frictional resistance developed at the nail/soil (driven nail) or grout/soil interface (drilled and grouted nail). The frictional soil nails do not show any end bearing resistance and, thus, soil-nailed structures have the potential to undergo a relatively large lateral deflection after construction. Therefore, the frictional resistance is considered an important parameter for the design and safety assessment of conventional soil-nailed structures. In soil nailing practice, primarily, this parameter is still evaluated using field-based experience rather than a detailed scientific knowledge of nail-soil interactions. Nowadays, pressure grouting is being progressively used for soil nailed structures as an alternative to the frequently used conventional gravity/low pressure grouting, since this grouting technique has the ability to increase the bond strength significantly, which in turn increases the pullout resistance of a grouted soil nail. The objective of this research is to develop a reliable and efficient method for enhancing the pullout resistance of soil nails through experimental research. This thesis concentrates on the experimental study of pressure-grouted anchor-type nail systems, which are being developed in the Priority Research Centre for Geotechnical Science and Engineering, The University of Newcastle, Australia. To conduct the fully instrumented experimental study, a new volume-controlled injection system was developed and the existing apparatus was redesigned and modified for pullout testing of the pressure-grouted nail system. The physical model study was comprised of three test groups. The underlying objective of Group 1 was to evaluate the effects of grout injection rates on the pressure-grouted soil nail system. To assess the grouting rate effects on the grout injectability and the pullout resistance of the pressure-grouted soil nail, pressurized grout (w/c = 0.50) was injected through the pre-buried soil nail by the newly developed volume-controlled injection pump at different injection rates, viz. 4.0 L/min, 5.0 L/min, and 6.5 L/min. Note that a latex membrane was used as a liner around the grouting outlets of the pre-buried hollow nail to form a Tube-a-Manchette (TAM) for direct injection of grout into the surrounding soil, simulating compaction grouting, which resulted in the formation…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: soil nail; compaction grouting; pullout force; pressure grouting; laboratory test; Injection rate; zero bleeding grout
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhuiyan, M. Z. I. (2020). Experimental study of pressure grouted soil nail system. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1415529
Chicago Manual of Style (16th Edition):
Bhuiyan, Mohammad Zahidul Islam. “Experimental study of pressure grouted soil nail system.” 2020. Doctoral Dissertation, University of Newcastle. Accessed April 15, 2021.
http://hdl.handle.net/1959.13/1415529.
MLA Handbook (7th Edition):
Bhuiyan, Mohammad Zahidul Islam. “Experimental study of pressure grouted soil nail system.” 2020. Web. 15 Apr 2021.
Vancouver:
Bhuiyan MZI. Experimental study of pressure grouted soil nail system. [Internet] [Doctoral dissertation]. University of Newcastle; 2020. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1959.13/1415529.
Council of Science Editors:
Bhuiyan MZI. Experimental study of pressure grouted soil nail system. [Doctoral Dissertation]. University of Newcastle; 2020. Available from: http://hdl.handle.net/1959.13/1415529

Brno University of Technology
30.
Bombera, Mojmír.
Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem.
Degree: 2018, Brno University of Technology
URL: http://hdl.handle.net/11012/26613
► The project elaborated in scope of engineering studies branch 2307. The project is submitting design of production technology of car emblem. Different manufacturing technologies have…
(more)
▼ The project elaborated in scope of engineering studies branch 2307. The project is submitting design of production technology of car emblem. Different manufacturing technologies have been compared based on study of technical literature. Most suitable technologies have been chosen such as
pressure die casting, especially aluminum alloys and plastic
injection molding. Plastic part is metal plated afterwards in order to get desired metal look. Part of this project is
injection molding tool design inclusive technical, technological and economic analysis.
Advisors/Committee Members: Kandus, Bohumil (advisor), Krška, Petr (referee).
Subjects/Keywords: Plasty; vstřikování plastů; pokovování; tlakové lití kovů; Plastics; injection molding; metal plating; pressure die casting
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APA (6th Edition):
Bombera, M. (2018). Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/26613
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):
Bombera, Mojmír. “Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem.” 2018. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/26613.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bombera, Mojmír. “Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem.” 2018. Web. 15 Apr 2021.
Vancouver:
Bombera M. Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/26613.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bombera M. Návrh technologie výroby plastového emblému automobilu: Design of manufacturing technology for plastic car emblem. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/26613
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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