subject:(Diffuser)

University of Arizona

1. Odom, Garret. Diffusers in Coherently Illuminated, Wide Field of View Applications .

Degree: 2016, University of Arizona

URL: http://hdl.handle.net/10150/620709

► Diffusers are devices that are designed to spread or scatter light. Many different types of diffusers are readily available in the commercial and scientific industries,… (more)

Subjects/Keywords: Optical Sciences; Diffuser

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APA (6^th Edition):

Odom, G. (2016). Diffusers in Coherently Illuminated, Wide Field of View Applications . (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/620709

Chicago Manual of Style (16^th Edition):

Odom, Garret. “Diffusers in Coherently Illuminated, Wide Field of View Applications .” 2016. Masters Thesis, University of Arizona. Accessed January 17, 2021. http://hdl.handle.net/10150/620709.

MLA Handbook (7^th Edition):

Odom, Garret. “Diffusers in Coherently Illuminated, Wide Field of View Applications .” 2016. Web. 17 Jan 2021.

Vancouver:

Odom G. Diffusers in Coherently Illuminated, Wide Field of View Applications . [Internet] [Masters thesis]. University of Arizona; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10150/620709.

Council of Science Editors:

Odom G. Diffusers in Coherently Illuminated, Wide Field of View Applications . [Masters Thesis]. University of Arizona; 2016. Available from: http://hdl.handle.net/10150/620709

2. Prakash R. Experimental and numerical investigations of flow through an annular diffuser with and without struts;.

Degree: Experimental and numerical investigations of flow through an annular diffuser with and without struts, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/17398

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An exhaust diffuser is a critical component of gas turbine applied to newlineboth the propulsion and power system applications. The exhaust diffuser of an newlineindustrial… (more)

Subjects/Keywords: Annular diffuser; Mechanical engineering; Struts

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APA (6^th Edition):

R, P. (2014). Experimental and numerical investigations of flow through an annular diffuser with and without struts;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17398

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

R, Prakash. “Experimental and numerical investigations of flow through an annular diffuser with and without struts;.” 2014. Thesis, Anna University. Accessed January 17, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/17398.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

R, Prakash. “Experimental and numerical investigations of flow through an annular diffuser with and without struts;.” 2014. Web. 17 Jan 2021.

Vancouver:

R P. Experimental and numerical investigations of flow through an annular diffuser with and without struts;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Jan 17]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17398.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

R P. Experimental and numerical investigations of flow through an annular diffuser with and without struts;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17398

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Victoria

3. Akhgari, Arash. Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine.

Degree: Dept. of Mechanical Engineering, 2011, University of Victoria

URL: http://hdl.handle.net/1828/3626

► The performance of a vertical axis wind turbine with and without a diffuser was studied using direct force measurement technique applied to a scaled model… (more)

Subjects/Keywords: turbines; diffuser; flow physics

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APA (6^th Edition):

Akhgari, A. (2011). Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine. (Masters Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/3626

Chicago Manual of Style (16^th Edition):

Akhgari, Arash. “Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine.” 2011. Masters Thesis, University of Victoria. Accessed January 17, 2021. http://hdl.handle.net/1828/3626.

MLA Handbook (7^th Edition):

Akhgari, Arash. “Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine.” 2011. Web. 17 Jan 2021.

Vancouver:

Akhgari A. Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine. [Internet] [Masters thesis]. University of Victoria; 2011. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1828/3626.

Council of Science Editors:

Akhgari A. Experimental investigation of the performance of a diffuser-augmented vertical axis wind turbine. [Masters Thesis]. University of Victoria; 2011. Available from: http://hdl.handle.net/1828/3626

Purdue University

4. Methel, Cam-Tu Jeanne. An experimental comparison of diffuser designs in a centrifugal compressor.

Degree: MSin Aeronautics and Astronautics, Aeronautics and Astronautics, 2016, Purdue University

URL: http://docs.lib.purdue.edu/open_access_theses/796

► The objective of this investigation was to compare the effects of two different diffuser vane geometries on the performance of a centrifugal compressor. Vaned… (more)

▼ The objective of this investigation was to compare the effects of two different diffuser vane geometries on the performance of a centrifugal compressor. Vaned diffusers are commonly used in aeroengines because they can achieve higher pressure recoveries than vaneless diffusers of similar size. Improving the diffuser’s pressure recovery and effectiveness can result in overall compressor performance benefits that are sought out by engine manufacturers looking to improve overall engine efficiency. An airfoil vane was tested and compared to a baseline wedge diffuser in the Purdue CSTAR research facility, where the centrifugal compressor used for this study is intended to be the last stage of an axial-centrifugal compressor. The overall stage performance for the compressor with the airfoil diffuser was first obtained at open impeller tip clearances and then at tight clearances. In the tight clearance configuration, the compressor consistently had higher total pressure ratio and higher isentropic efficiency compared to the open clearance configuration. In particular, impeller isentropic efficiency and shroud static pressure along the entire impeller passage were highest at the tight impeller clearance configuration, indicating less losses due to tip leakage flow. The reduction in tip leakage flow, and resulting blockage, at tight clearance operation was also suggested by the increase in choke mass flow rate for all corrected speeds. For the comparison of the airfoil and wedge diffuser assemblies, data were acquired with the impeller in the tight clearance configuration. Despite slight differences in exducer tip clearances (less than 2x10-3 in.), stage total pressure ratio and isentropic efficiency at 100% corrected speed were not significantly different between the two diffuser assemblies. Upon closer inspection of individual components, the airfoil diffuser actually had, on average, higher pressure recovery and higher diffuser effectiveness than the wedge diffuser. However, the airfoil diffuser assembly had higher losses in the deswirl region compared to the wedge diffuser assembly. Excluding measurements from the deswirl, the total pressure ratio for the airfoil diffuser assembly was slightly greater than that of the wedge diffuser assembly. A physical mismatch in the airfoil diffuser and deswirl assembly could be responsible for the losses recorded in the deswirl region and could have resulted in the limited performance improvements observed. Additionally, the similar vane geometries at the leading edge (in terms of inlet metal angle and thickness) combined with any deviation from design during manufacturing could have limited the predicted performance benefits. Advisors/Committee Members: Nicole L. Key, Nicole L. Key, Guillermo Paniagua, Sally P. Bane.

Subjects/Keywords: Applied sciences; Airfoil diffuser; Centrifugal compressor; Diffuser; Experimental aerodynamics; Aerospace Engineering

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APA (6^th Edition):

Methel, C. J. (2016). An experimental comparison of diffuser designs in a centrifugal compressor. (Thesis). Purdue University. Retrieved from http://docs.lib.purdue.edu/open_access_theses/796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Methel, Cam-Tu Jeanne. “An experimental comparison of diffuser designs in a centrifugal compressor.” 2016. Thesis, Purdue University. Accessed January 17, 2021. http://docs.lib.purdue.edu/open_access_theses/796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Methel, Cam-Tu Jeanne. “An experimental comparison of diffuser designs in a centrifugal compressor.” 2016. Web. 17 Jan 2021.

Vancouver:

Methel CJ. An experimental comparison of diffuser designs in a centrifugal compressor. [Internet] [Thesis]. Purdue University; 2016. [cited 2021 Jan 17]. Available from: http://docs.lib.purdue.edu/open_access_theses/796.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Methel CJ. An experimental comparison of diffuser designs in a centrifugal compressor. [Thesis]. Purdue University; 2016. Available from: http://docs.lib.purdue.edu/open_access_theses/796

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

5. Samal, Nihar Ranjan. A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector.

Degree: MS, Mechanical Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/76931

► A subsonic wind tunnel facility was built and tested as part of a base line test investigating flow within a diffuser-collector. Facility controls allowed the… (more)

Subjects/Keywords: Annular diffuser; Diffuser-Collector; Exhaust hood; Pressure recovery; Stereo-PIV

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APA (6^th Edition):

Samal, N. R. (2011). A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/76931

Chicago Manual of Style (16^th Edition):

Samal, Nihar Ranjan. “A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector.” 2011. Masters Thesis, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/76931.

MLA Handbook (7^th Edition):

Samal, Nihar Ranjan. “A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector.” 2011. Web. 17 Jan 2021.

Vancouver:

Samal NR. A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/76931.

Council of Science Editors:

Samal NR. A wind tunnel facility for the evaluation of a land-based gas turbine diffuser-collector. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/76931

University of Miami

6. Akin, Yagmur. Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision.

Degree: MS, Electrical and Computer Engineering (Engineering), 2016, University of Miami

URL: https://scholarlyrepository.miami.edu/oa_theses/617

► Developments in microfluidics have led a wide variety of research on MEMS-scaled biomedical applications. Many biomedical sensors, drug delivery systems, cell and protein syntheses… (more)

Subjects/Keywords: Micropump; PVDF-TrFE; Diffuser; Nozzle; Actuator; Nanoliter

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APA (6^th Edition):

Akin, Y. (2016). Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision. (Thesis). University of Miami. Retrieved from https://scholarlyrepository.miami.edu/oa_theses/617

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Akin, Yagmur. “Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision.” 2016. Thesis, University of Miami. Accessed January 17, 2021. https://scholarlyrepository.miami.edu/oa_theses/617.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Akin, Yagmur. “Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision.” 2016. Web. 17 Jan 2021.

Vancouver:

Akin Y. Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision. [Internet] [Thesis]. University of Miami; 2016. [cited 2021 Jan 17]. Available from: https://scholarlyrepository.miami.edu/oa_theses/617.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Akin Y. Integrated Biocompatible Piezoelectric Micropump System with Nanoliter Volume Precision. [Thesis]. University of Miami; 2016. Available from: https://scholarlyrepository.miami.edu/oa_theses/617

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

7. Buehrle, Bridget Erin. Modeling of Small-Scale Wind Energy Conversion Systems.

Degree: MS, Mechanical Engineering, 2013, Virginia Tech

URL: http://hdl.handle.net/10919/50920

► As wind turbines are increasingly being adopted for meeting growing energy needs, their implementation for personal home use in the near future is imminent. There… (more)

▼ As wind turbines are increasingly being adopted for meeting growing energy needs, their implementation for personal home use in the near future is imminent. There are very few studies conducted on small-scale turbines in the one to two meter diameter range because the power generated at this scale is currently not sufficient to justify the cost of installation and maintenance. The problem is further complicated by the fact that these turbines are normally mounted at low altitudes and thus there is necessity to have the optimum operating regime in the wind speed range of 3-10 mph (1.34 – 4.47 m/s). This thesis discusses two methods for increasing the efficiency of horizontal axis small-scale wind energy conversion systems, 1) adding a diffuser to increase the wind speed at the rotor and 2) designing tubercles to enhance the flow characteristics over blades. Further, it was identified during the course of thesis that for simple installation and maintenance in the residential areas vertical axis turbines are advantageous. Thus, the second chapter of this thesis addresses the design of vertical axis turbines with power generation capability suitable for that of a typical US household. The study of the diffuser augmented wind turbine provides optimum dimensions for achieving high power density that can address the challenges associated with small scale wind energy systems; these challenges are to achieve a lower start-up speed and low wind speed operation. The diffuser design was modeled using commercial computational fluid dynamics code. Two-dimensional modeling using actuator disk theory was used to optimize the diffuser design. A statistical study was then conducted to reduce the computational time by selecting a descriptive set of models to simulate and characterize relevant parameterséffects instead of checking all the possible combinations of input parameters. Individual dimensions were incorporated into JMP® software and randomized to design the experiment. The results of the JMP® analysis are discussed in this paper. Consistent with the literature, a long outlet section with length one to three times the diameter coupled with a sharp angled inlet was found to provide the highest amplification for a wind turbine diffuser. The second study consisted of analyzing the capabilities of a small-scale vertical axis wind turbine. The turbine consisted of six blades of extruded aluminum NACA 0018 airfoils of 0.08732 m (3.44 in) in chord length. Small-scale wind turbines often operate at Reynolds numbers less than 200,000, and issues in modeling their flow characteristics are discussed throughout this thesis. After finding an appropriate modeling technique, it was found that the vertical axis wind turbine requires more accurate turbulence models to appropriately discover its performance capabilities. The use of tubercles on aerodynamic blades has been found to delay stall angle and increase the aerodynamic efficiency. Models of 440 mm (17.33 in) blades with and without tubercles were… Advisors/Committee Members: Priya, Shashank (committeechair), O'Brien, Walter F. Jr. (committee member), Tafti, Danesh K. (committee member).

Subjects/Keywords: diffuser; wind; vertical axis; tubercles; small-scale

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Buehrle, B. E. (2013). Modeling of Small-Scale Wind Energy Conversion Systems. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/50920

Chicago Manual of Style (16^th Edition):

Buehrle, Bridget Erin. “Modeling of Small-Scale Wind Energy Conversion Systems.” 2013. Masters Thesis, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/50920.

MLA Handbook (7^th Edition):

Buehrle, Bridget Erin. “Modeling of Small-Scale Wind Energy Conversion Systems.” 2013. Web. 17 Jan 2021.

Vancouver:

Buehrle BE. Modeling of Small-Scale Wind Energy Conversion Systems. [Internet] [Masters thesis]. Virginia Tech; 2013. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/50920.

Council of Science Editors:

Buehrle BE. Modeling of Small-Scale Wind Energy Conversion Systems. [Masters Thesis]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/50920

University of Wollongong

8. Gomis, Laia Ledo. Effect of diffuser augmented micro wind turbines features on device performance.

Degree: Masters by Research, 2011, University of Wollongong

URL: 0903 BIOMEDICAL ENGINEERING ; https://ro.uow.edu.au/theses/3532

► Wind turbines can be classified into different categories based on the power output: large (>1 MW), medium (40 kW–1 MW) and small ( On-site… (more)

▼ Wind turbines can be classified into different categories based on the power output: large (>1 MW), medium (40 kW–1 MW) and small ( On-site power generation from micro wind turbines properly located on roof - tops can supply carbon free energy whenever it is needed, thus decreasing our dependence on fossil fuel, and helping to reduce carbon dioxide (CO2) emissions. However, the viability of micro wind turbines as a potential power source for domestic energy needs is still hindered by i) the unfavourable characteristics of urban wind such as high turbulent flow and low velocity, and ii) the limited output of micro wind turbines. Since the performance of micro wind turbines is influenced by the wind characteristics of a suburban topology, it is important to study the location and conditions where micro wind turbines should best be placed. An increase in wind speed across the turbine rotor significantly increases the power output, so encasing micro wind turbines inside ducts increases the mass flow rate drawn into the turbine which generates an output power typically 2 times higher than conventional wind turbines. Moreover, the wind speed can be further enhanced by adjusting the duct geometry with diffuser shaped ducts. Diffuser-shaped ducts have been experimentally proven to increase the performance of micro wind turbines. Despite this, only limited computational work with simplified turbine geometries has been undertaken. The present work used the Computational Fluid Dynamics (CFD) technique to investigate various factors affecting the performance of diffuser augmented micro wind turbines. Firstly, the characteristics of wind flow above the roofs of typical suburban buildings (pitched, pyramidal, and flat roofs) were investigated to find the optimum roof top position for a wind turbine. Secondly, the effect of various diffuser geometries on the efficiency of micro wind turbines was studied. The coefficient of performance of a straight diffuser, an airfoil shaped diffuser, a diffuser with flanges, an airfoil shaped diffuser with flanges, and a compact brim diffuser were compared to conventional bare wind turbines. The flow field around the turbine blades and inside the diffuser was analysed in terms of developed 3-D stream lines, the pressure field, velocity field, and mass flow rate. Lastly, the influence of rotor features such as the profile of the rotor blade, the number of blades, and the clearance between the blade tip and the duct, on the output power were evaluated. It should be noted that the applied methodology was validated with the numerical and experimental results available in the literature. The results confirmed that the wind flow characteristics are strongly dependent on the profile of the roofs as well as the direction of the incoming wind. The wind above flat roofs had not only lower turbulent intensity compared to the other roof profiles, the turbulence beyond the roof also decreased rapidly. In terms of wind velocity, both pitched and pyramidal roofs generally…

Subjects/Keywords: diffuser wind turbine; computational fluid dynamics (CFD); urban wind characteristics; diffuser geometry

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APA (6^th Edition):

Gomis, L. L. (2011). Effect of diffuser augmented micro wind turbines features on device performance. (Masters Thesis). University of Wollongong. Retrieved from 0903 BIOMEDICAL ENGINEERING ; https://ro.uow.edu.au/theses/3532

Chicago Manual of Style (16^th Edition):

Gomis, Laia Ledo. “Effect of diffuser augmented micro wind turbines features on device performance.” 2011. Masters Thesis, University of Wollongong. Accessed January 17, 2021. 0903 BIOMEDICAL ENGINEERING ; https://ro.uow.edu.au/theses/3532.

MLA Handbook (7^th Edition):

Gomis, Laia Ledo. “Effect of diffuser augmented micro wind turbines features on device performance.” 2011. Web. 17 Jan 2021.

Vancouver:

Gomis LL. Effect of diffuser augmented micro wind turbines features on device performance. [Internet] [Masters thesis]. University of Wollongong; 2011. [cited 2021 Jan 17]. Available from: 0903 BIOMEDICAL ENGINEERING ; https://ro.uow.edu.au/theses/3532.

Council of Science Editors:

Gomis LL. Effect of diffuser augmented micro wind turbines features on device performance. [Masters Thesis]. University of Wollongong; 2011. Available from: 0903 BIOMEDICAL ENGINEERING ; https://ro.uow.edu.au/theses/3532

NSYSU

9. Chen, Ming-Fa. Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays.

Degree: PhD, Mechanical and Electro-Mechanical Engineering, 2009, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-010251

► Integrated microlens array on a transparent film, called an optical film, provides interesting applications for various fields. In a FPD (Flat Panel Display), the optical… (more)

Subjects/Keywords: polygonal microlens array; fill-factor; uniformity; diffuser film

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APA (6^th Edition):

Chen, M. (2009). Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays. (Doctoral Dissertation). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-010251

Chicago Manual of Style (16^th Edition):

Chen, Ming-Fa. “Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays.” 2009. Doctoral Dissertation, NSYSU. Accessed January 17, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-010251.

MLA Handbook (7^th Edition):

Chen, Ming-Fa. “Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays.” 2009. Web. 17 Jan 2021.

Vancouver:

Chen M. Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays. [Internet] [Doctoral dissertation]. NSYSU; 2009. [cited 2021 Jan 17]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-010251.

Council of Science Editors:

Chen M. Design and Fabrication of A Diffuser Film with Two Layers of Microlens Arrays. [Doctoral Dissertation]. NSYSU; 2009. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0729109-010251

10. Maia, Lino André Bala. Experimental and numerical study of a diffuser augmented wind turbine - DAWT.

Degree: 2014, Instituto Politécnico de Bragança

URL: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/11600

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The effect of concentrator-diffuser (C-D) of a shrouded wind turbine was studied. The main objective involved assessing the increment that this device induces in productivity… (more)

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The effect of concentrator-diffuser (C-D) of a shrouded wind turbine was studied. The main objective involved assessing the increment that this device induces in productivity of small wind turbines. Also the aerodynamic performance of two scaled blade models were studied in terms of drag and lift forces as a function of angle of attack for Re of 15714 and 37143. Wind turbine power performance was evaluated in terms of power coefficient values. Laboratory measurements showed that improvements were obtained on the electrical power values, resulting in an average increase of 90% in the corresponding power coefficient values. A more pronounced enhancement is described at lower wind speed values. CFD calculations were performed at flow values of 6 and 14 m/s to the C-D device. CFD calculations performed an evaluation of velocity experienced in the action rotor zone, which provided maximum increases of 81 % and 86 %, respectively. Numerical simulations and experimental measurements were performed also to the blades, where the results obtained were similar, providing a difference of 25 % for drag forces.

Neste trabalho estudou-se o efeito do concentrador-difusor (C-D) numa turbina eólica encapsulada. O principal objetivo deste estudo é avaliar o incremento que o C-D induz na produtividade de turbinas eólicas de pequena dimensão. Foi também avaliado o desempenho aerodinâmico de dois modelos de uma pá com diferentes razões de escala. Estes modelos foram avaliados em termos de forças de arrasto e de sustentação em função do ângulo de ataque, considerando Reynolds de 15714 e 37143. O desempenho energético da turbina foi avaliada em termos de coeficiente de potência. Segundo as medições laboratoriais verificou-se melhorias nos valores de potência elétrica, resultando num aumento médio de 90 %, nos correspondentes valores de coeficiente de potência. Para valores de velocidade mais baixos verificou-se um incremente mais pronunciado. Efetuaram-se simulações CFD ao dispositivo C-D para valores de velocidade de vento de 6 e 14 m/s. Estas simulações reproduziram uma avaliação dos valores de velocidade do ar verificados na zona de ação do rotor, produzindo aumentos máximos de 81 % e 86 %, respetivamente. Aplicaram-se também medições experimentais e simulações numéricas para avaliar o desempenho aerodinâmico da pá. Estas produziram resultados similares, originando uma diferença média de 25 % nos valores das forças de arrasto.

Advisors/Committee Members: Ribeiro, Luís Frölén, Ribeiro, J.E..

Subjects/Keywords: Concentrator-diffuser; Blade aerodynamic; Small wind turbine; Power coefficient

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APA (6^th Edition):

Maia, L. A. B. (2014). Experimental and numerical study of a diffuser augmented wind turbine - DAWT. (Thesis). Instituto Politécnico de Bragança. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/11600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Maia, Lino André Bala. “Experimental and numerical study of a diffuser augmented wind turbine - DAWT.” 2014. Thesis, Instituto Politécnico de Bragança. Accessed January 17, 2021. https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/11600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Maia, Lino André Bala. “Experimental and numerical study of a diffuser augmented wind turbine - DAWT.” 2014. Web. 17 Jan 2021.

Vancouver:

Maia LAB. Experimental and numerical study of a diffuser augmented wind turbine - DAWT. [Internet] [Thesis]. Instituto Politécnico de Bragança; 2014. [cited 2021 Jan 17]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/11600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Maia LAB. Experimental and numerical study of a diffuser augmented wind turbine - DAWT. [Thesis]. Instituto Politécnico de Bragança; 2014. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/11600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Stellenbosch University

11. Burger, Christiaan Johannes. Design procedure of a compact crossover diffuser for micro gas turbine application.

Degree: MEng, Mechanical and Mechatronic Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98634

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ENGLISH ABSTRACT: The design of a compact crossover diffuser to replace the size-limited radial diffuser and axial de-swirl cascade of the BMT120KS MGT is discussed.… (more)

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ENGLISH ABSTRACT: The design of a compact crossover diffuser to replace the size-limited radial diffuser and axial de-swirl cascade of the BMT120KS MGT is discussed. A crossover diffuser strives to combine the performance of a channel diffuser with the operating range and efficiency of a vaneless diffuser. Continuous aerodynamic vanes are designed to match the centrifugal impeller discharge flow and gradually diffuse the air towards the axial combustor inlet where the effect of swirling flow on combustor performance is experimentally investigated. Swirling combustor flow promotes combustion intensity, reduces combustion length, and enhances combustion stability. The study includes the development of a one-dimensional Mean-Line Code (MLC) which aids the designer in preliminary design and performance evaluation. A three-dimensional multiple operating point optimisation is conducted thereafter using Numeca FineTM/Turbo). The final design is manufactured using a five-axis CNC milling machine and experimentally tested by modifying the existing BMT120KS engine. The optimised crossover diffuser and modified impeller yielded a numerical increase in the total-to-static compressor stage pressure ratio from 2:93 to 3:83, increase in the static pressure recovery coefficient from 50:92% to 68:49%, and relaxed the compressor stage discharge flow angle from 84:14° to 34:28° (compared to the modified BMT120KS engine). Experimental results are recorded up to a rotational speed of 106 000RPM and extrapolated to the design speed of 120 000 RPM. The extrapolated results indicate a thrust increase from 107:3N to 220N and increase in total-to-static compressor stage pressure ratio from 2:62 to 3:65 at 120 000RPM (compared to the original BMT120KS engine).

AFRIKAANSE OPSOMMING: Die ontwerp van n kompakte oorgangsdiffusor om die radiale lem diffusor en aksiale rig-lemme van die bestaande BMT120KS mikrogasturbine te vervang word bespreek. ‘n Kompakte oorgangsdiffusor beoog om die werksverigting van ‘n kanaaldiffusor met die bedryfsgebied van n lemlose diffusor te kombineer. Deurlopende aerodinamiese lemme is ontwerp om die sentrifigaalkompressor rotor uitlaatvloei geleidelik te diffundeer tot waar dit die verbrandingsruim binne gaan met ‘n beduidende tangensiale vloeikomponent. Die studie sluit in die ontwikkeling van ‘n een-dimensionele kode wat die ontwerper instaat stel om ‘n kompakte oorgangsdiffusor te ontwerp en te evalueer . Daarna is optimering gedoen in Numeca FineTM/Turbo (BVM sagteware) en die finale ontwerp is vervaardig met behulp van ‘n vyf-as numeries beheerde freesmasjien. Die geoptimeerde oorgangsdiffusor en rotor lewer ‘n numeriese toename in die totale-tot-statiese kompressor stadium drukverhouding vanaf 2:93 na 3:83, ‘n toename in die statiese druk herwinningskoëffisiënt vanaf 50:92% tot 68:49%, en verminder die uitlaat-vloeihoek vanaf 84:14°na 34:28° (vergeleke met die gewysigde BMT120KS enjin). Eksperimentele resultate is verkry tot by ‘n rotasie spoed van 106 000RPM en…

Advisors/Committee Members: Van der Spuy, S. J., Von Backstrom, T. W., Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering..

Subjects/Keywords: Compact crossover diffuser – Design; Micro gas turbine application; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Burger, C. J. (2016). Design procedure of a compact crossover diffuser for micro gas turbine application. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98634

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Burger, Christiaan Johannes. “Design procedure of a compact crossover diffuser for micro gas turbine application.” 2016. Thesis, Stellenbosch University. Accessed January 17, 2021. http://hdl.handle.net/10019.1/98634.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Burger, Christiaan Johannes. “Design procedure of a compact crossover diffuser for micro gas turbine application.” 2016. Web. 17 Jan 2021.

Vancouver:

Burger CJ. Design procedure of a compact crossover diffuser for micro gas turbine application. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10019.1/98634.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Burger CJ. Design procedure of a compact crossover diffuser for micro gas turbine application. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98634

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

12. Herring, Alexander. Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis.

Degree: MS, Aerospace Engineering, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155043

► Testing of aerodynamic loads on a sub-scale model has been the most accurate way to predict full-scale loads for many years. Even with modern advances… (more)

Subjects/Keywords: Aerospace; Wind tunnel; Testing; Flow uniformity; Diffuser design; Dynamic pressure

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APA (6^th Edition):

Herring, A. (2015). Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155043

Chicago Manual of Style (16^th Edition):

Herring, Alexander. “Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis.” 2015. Masters Thesis, Texas A&M University. Accessed January 17, 2021. http://hdl.handle.net/1969.1/155043.

MLA Handbook (7^th Edition):

Herring, Alexander. “Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis.” 2015. Web. 17 Jan 2021.

Vancouver:

Herring A. Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis. [Internet] [Masters thesis]. Texas A&M University; 2015. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1969.1/155043.

Council of Science Editors:

Herring A. Dynamic Pressure Improvements to Closed-Circuit Wind Tunnels with Flow Quality Analysis. [Masters Thesis]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155043

Queens University

13. Kawun, Paul. The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump .

Degree: Mechanical and Materials Engineering, 2016, Queens University

URL: http://hdl.handle.net/1974/14055

► This research presents the design and development of a magnetically actuated nozzle/diffuser micropump for use in the treatment of glaucoma. The micropump is composed of… (more)

Subjects/Keywords: MEMS ; Valveless Micropump ; Nozzle/Diffuser ; Wireless Actuation ; Glaucoma

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APA (6^th Edition):

Kawun, P. (2016). The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/14055

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kawun, Paul. “The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump .” 2016. Thesis, Queens University. Accessed January 17, 2021. http://hdl.handle.net/1974/14055.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kawun, Paul. “The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump .” 2016. Web. 17 Jan 2021.

Vancouver:

Kawun P. The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump . [Internet] [Thesis]. Queens University; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1974/14055.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kawun P. The Design and Development of an Electromagnetically Actuated Nozzle/Diffuser Micropump . [Thesis]. Queens University; 2016. Available from: http://hdl.handle.net/1974/14055

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University

14. Cerantola, David. Evaluation of Swirl and Tabs in Short Annular Diffusers .

Degree: Mechanical and Materials Engineering, 2014, Queens University

URL: http://hdl.handle.net/1974/12212

► Short annular diffusers were essential components for turbomachines that have been used to expand the air entering the compressor, as interstage ducts between gas generators… (more)

Subjects/Keywords: numerical shape optimization ; CFD ; vortex generators ; swirl ; centre-body ; annular diffuser

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APA (6^th Edition):

Cerantola, D. (2014). Evaluation of Swirl and Tabs in Short Annular Diffusers . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12212

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cerantola, David. “Evaluation of Swirl and Tabs in Short Annular Diffusers .” 2014. Thesis, Queens University. Accessed January 17, 2021. http://hdl.handle.net/1974/12212.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cerantola, David. “Evaluation of Swirl and Tabs in Short Annular Diffusers .” 2014. Web. 17 Jan 2021.

Vancouver:

Cerantola D. Evaluation of Swirl and Tabs in Short Annular Diffusers . [Internet] [Thesis]. Queens University; 2014. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1974/12212.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cerantola D. Evaluation of Swirl and Tabs in Short Annular Diffusers . [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/12212

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ottawa

15. Vouk, Ivana. Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River .

Degree: 2016, University of Ottawa

URL: http://hdl.handle.net/10393/34098

► Wastewater treatment plants discharge effluents containing a number of constituents whose concentrations may negatively affect the receiving waters. Current research in mixing and transport between… (more)

Subjects/Keywords: effluent; river mixing; ammonia; multiport diffuser; CFD modelling; Ottawa River

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APA (6^th Edition):

Vouk, I. (2016). Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/34098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vouk, Ivana. “Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River .” 2016. Thesis, University of Ottawa. Accessed January 17, 2021. http://hdl.handle.net/10393/34098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vouk, Ivana. “Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River .” 2016. Web. 17 Jan 2021.

Vancouver:

Vouk I. Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River . [Internet] [Thesis]. University of Ottawa; 2016. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10393/34098.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vouk I. Field and Numerical Investigation of Mixing and Transport of Ammonia in the Ottawa River . [Thesis]. University of Ottawa; 2016. Available from: http://hdl.handle.net/10393/34098

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Michigan

16. Kokash, Hussein. Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser.

Degree: MS, Engineering, 2020, University of Michigan

URL: http://hdl.handle.net/2027.42/156250

► The need for a convenient environment for humans is the driving cause of coming up with the best thermal comfort conditions possible. There are major… (more)

▼ The need for a convenient environment for humans is the driving cause of coming up with the best thermal comfort conditions possible. There are major factors influencing room air distribution which requires the knowledge for a proper selection of the best design that will serve the need, taking into account the importance of energy consumption optimization in delivering intended thermal levels. Modern fluid mechanical problems would be impossible to solve without the use of computational fluid dynamics (CFD). As we have seen, the scope of analytical solutions to fundamental equations of fluid mechanics is very limited and, once a more difficult geometry is encountered, we usually have to choose a given numerical method for obtaining a solution. In this work CFD analysis software is used to investigate flow behaviour of air used in cooling and heating a room with the use of Coanda effect, which is "the tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to entrain fluid from the surroundings so that a region of lower pressure develops." Air-conditioning significantly leads to an excessive consumption of energy in buildings. The overall efficiency of air-conditioning systems must be demonstrated and measured to prevent needless energy wastage. This work offers the results of a finished examination to assess the performance of a proposed new design at the end cycle of an air-conditioning system. The main goal of this work is to determine whether the proposed design will outperform the commercial cone design of diffusers in air distribution, thus; achieving better energy consumption and thermal comfort using the same input parameters. Through introducing a proposed diffuser that delivers airflow horizontally, and placing the design with a commercial design, which is the Multi-cone diffuser, where the flow is ejected at a certain angle a set of parameters and conditions were studied throughout this work, the results of the performance and thermal comfort analysis of the proposed diffuser came out to be interesting and could compete with the Multi-cone diffuser, specifically in cooling situations. These results is presented, and a comparison is made with another design of diffusers, the well known commercial cone diffuser. Room layout and analysis were carried out using ANSYS software. The Multi-hole diffuser that ejects horizontal jets and promotes Coanda effect (having the jets “hanging” longer to the ceiling) although it is desirable for cooling, it is not an ideal choice for heating since the hot air stays near the ceiling and causes strong stratification. implying that diffusers with large inclination angle towards the ceiling create less efficient mixing in the horizontal direction and should be optimized whether by increasing the airflow velocity of directing the outlet flow to be ejected with a specific angle. ASHRAE Standard 55's thermal comfort several factors of building occupants were used as the decisive tool for diffusers performance. … Advisors/Committee Members: Burzo, Mihai (advisor), Khanafer, Khalil (committee member), Mazumder, Quamrul (committee member).

Subjects/Keywords: airflow; Coanda effect; computational fluid dynamics; cooling; diffuser; HVAC; Mechanical engineering

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APA (6^th Edition):

Kokash, H. (2020). Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser. (Masters Thesis). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/156250

Chicago Manual of Style (16^th Edition):

Kokash, Hussein. “Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser.” 2020. Masters Thesis, University of Michigan. Accessed January 17, 2021. http://hdl.handle.net/2027.42/156250.

MLA Handbook (7^th Edition):

Kokash, Hussein. “Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser.” 2020. Web. 17 Jan 2021.

Vancouver:

Kokash H. Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser. [Internet] [Masters thesis]. University of Michigan; 2020. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2027.42/156250.

Council of Science Editors:

Kokash H. Optimization through CFD analysis of a Coanda effect enhanced novel HVAC diffuser. [Masters Thesis]. University of Michigan; 2020. Available from: http://hdl.handle.net/2027.42/156250

Univerzitet u Beogradu

17. Ilić, Dejan, 1975-. Вихорно струјање у правим дифузорима кружног попречног пресека.

Degree: Mašinski fakultet, 2014, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:7284/bdef:Content/get

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Машинство-Хидрауличне машине и енергетски системи / Mechanical Engineering-Hydraulic machines and energy systems

Овим радом обухваћена су комплексна теоријска и експериментална истраживања вихорних турбулентних струјања, у… (more)

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Машинство-Хидрауличне машине и енергетски системи / Mechanical Engineering-Hydraulic machines and energy systems

Овим радом обухваћена су комплексна теоријска и експериментална истраживања вихорних турбулентних струјања, у правим дифузорима кружног попречног пресека. Генератор вихорног струјања, у оквиру овог рада, је обртно коло аксијалног вентилатора, које је постављено у почетном делу кратке цевне деонице кружног попречног пресека на коју се наставља испитивани дифузор. Први циљ истраживања је изучавање карактеристика вихорног струјања у дифузору, односно одређивање односа коефицијента губитака при вихорном струјању са коефицијентом губитака при чисто аксијалном струјању у правим дифузорима кружног попречног пресека. Други циљ, је формирање алгебарског модела турбулентног вихорног струјања, базираног на Рејнолдсовим једначинама и сазнањима о укупним напонима турбулентног струјања до којих се дошло у оквиру истраживања. Укупни напони турбулентног струјања рачунају се на основу просечних вредности величина стања флуида. Просечне вредности одређене су мерењем профила тоталног (укупног) притиска, статичког (струјног) притиска и струјног угла, односно профила обимске и аксијалне компоненте просечне брзине, у различитим пресецима дуж три дифузора (различитих углова ширења), за више различитих режима. Анализом срачунатих укупних напона турбулентног вихорног струјања, добијени су општи изрази и законитости њихових промена по радијусу дуж дифузора. На основу алгебарског модела одређују се поље брзине и притиска у низструјним пресецима дифузора, када су дати гранични и почетни услови нестишљивог струјања флуида...

Advisors/Committee Members: Benišek, Miroslav, 1946-.

Subjects/Keywords: diffuser; swirl flow; measurements; swirl number; turbulent stresses; loss coefficient; model

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ilić, Dejan, 1. (2014). Вихорно струјање у правим дифузорима кружног попречног пресека. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:7284/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ilić, Dejan, 1975-. “Вихорно струјање у правим дифузорима кружног попречног пресека.” 2014. Thesis, Univerzitet u Beogradu. Accessed January 17, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:7284/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ilić, Dejan, 1975-. “Вихорно струјање у правим дифузорима кружног попречног пресека.” 2014. Web. 17 Jan 2021.

Vancouver:

Ilić, Dejan 1. Вихорно струјање у правим дифузорима кружног попречног пресека. [Internet] [Thesis]. Univerzitet u Beogradu; 2014. [cited 2021 Jan 17]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7284/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ilić, Dejan 1. Вихорно струјање у правим дифузорима кружног попречног пресека. [Thesis]. Univerzitet u Beogradu; 2014. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:7284/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Univerzitet u Beogradu

18. Новковић, Ђорђе М., 1976- 28360295. Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима.

Degree: Mašinski fakultet, 2019, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/get

Машинство-Механика флуида / Mechanical Engineering - Fluid mechanics

У дисертацији је истраживано турбулентно вихорно и безвихорно струјање нестишљивог флуида у правим конусним дифузорима...

Advisors/Committee Members: Lečić, Milan, 1962- 12598375.

Subjects/Keywords: diffuser; swirling flow; turbulent stresses; anisotropy; modeling; OpenFOAM

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APA (6^th Edition):

Новковић, Ђорђе М., 1. 2. (2019). Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Новковић, Ђорђе М., 1976- 28360295. “Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима.” 2019. Thesis, Univerzitet u Beogradu. Accessed January 17, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Новковић, Ђорђе М., 1976- 28360295. “Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима.” 2019. Web. 17 Jan 2021.

Vancouver:

Новковић, Ђорђе М. 12. Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима. [Internet] [Thesis]. Univerzitet u Beogradu; 2019. [cited 2021 Jan 17]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/get.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Новковић, Ђорђе М. 12. Моделирање и нумерички прорачуни струјања нестишљивог флуида у правим конусним дифузорима. [Thesis]. Univerzitet u Beogradu; 2019. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:20413/bdef:Content/get

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queen Mary, University of London

19. Singh, Gursharanjit. The study of the interactions between a low pressure steam turbine and axial-radial diffuser.

Degree: PhD, 2015, Queen Mary, University of London

URL: http://qmro.qmul.ac.uk/xmlui/handle/123456789/15029 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694423

► Specific power output from a Low Pressure (LP) steam turbine can be enhanced by increasing the stage efficiency or raising its pressure ratio; both methods… (more)

Subjects/Keywords: 621.1; low pressure steam turbine; axial-radial diffuser

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APA (6^th Edition):

Singh, G. (2015). The study of the interactions between a low pressure steam turbine and axial-radial diffuser. (Doctoral Dissertation). Queen Mary, University of London. Retrieved from http://qmro.qmul.ac.uk/xmlui/handle/123456789/15029 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694423

Chicago Manual of Style (16^th Edition):

Singh, Gursharanjit. “The study of the interactions between a low pressure steam turbine and axial-radial diffuser.” 2015. Doctoral Dissertation, Queen Mary, University of London. Accessed January 17, 2021. http://qmro.qmul.ac.uk/xmlui/handle/123456789/15029 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694423.

MLA Handbook (7^th Edition):

Singh, Gursharanjit. “The study of the interactions between a low pressure steam turbine and axial-radial diffuser.” 2015. Web. 17 Jan 2021.

Vancouver:

Singh G. The study of the interactions between a low pressure steam turbine and axial-radial diffuser. [Internet] [Doctoral dissertation]. Queen Mary, University of London; 2015. [cited 2021 Jan 17]. Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/15029 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694423.

Council of Science Editors:

Singh G. The study of the interactions between a low pressure steam turbine and axial-radial diffuser. [Doctoral Dissertation]. Queen Mary, University of London; 2015. Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/15029 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.694423

Halmstad University

20. Tångne, Gustaf. Projekt Air Control.

Degree: Business and Engineering (SET), 2008, Halmstad University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1693

Dynamic Air Diffuser

Subjects/Keywords: Produktutveckling; Dynamic Air Diffuser

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APA (6^th Edition):

Tångne, G. (2008). Projekt Air Control. (Thesis). Halmstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1693

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Tångne, Gustaf. “Projekt Air Control.” 2008. Thesis, Halmstad University. Accessed January 17, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1693.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Tångne, Gustaf. “Projekt Air Control.” 2008. Web. 17 Jan 2021.

Vancouver:

Tångne G. Projekt Air Control. [Internet] [Thesis]. Halmstad University; 2008. [cited 2021 Jan 17]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1693.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Tångne G. Projekt Air Control. [Thesis]. Halmstad University; 2008. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1693

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

21. Dresel, Eva. Development and Characterization of a Light Diffuser for a Concentrating PV Collector.

Degree: Energy and Environmental Engineering, 2011, University of Gävle

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9873

► Hybrid solar systems as well as concentrating solar collectors are promising solar technologies. To run them efficiently in northern countries is a task Solarus… (more)

Subjects/Keywords: Concentrating PV Collector; Hybrid Solar Collector; Solar Energy; Light Diffuser

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APA (6^th Edition):

Dresel, E. (2011). Development and Characterization of a Light Diffuser for a Concentrating PV Collector. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9873

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dresel, Eva. “Development and Characterization of a Light Diffuser for a Concentrating PV Collector.” 2011. Thesis, University of Gävle. Accessed January 17, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9873.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dresel, Eva. “Development and Characterization of a Light Diffuser for a Concentrating PV Collector.” 2011. Web. 17 Jan 2021.

Vancouver:

Dresel E. Development and Characterization of a Light Diffuser for a Concentrating PV Collector. [Internet] [Thesis]. University of Gävle; 2011. [cited 2021 Jan 17]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9873.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dresel E. Development and Characterization of a Light Diffuser for a Concentrating PV Collector. [Thesis]. University of Gävle; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9873

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

22. Bijvoet, Bastiaan (author). Design and characterization of test facility for large angle diffusers.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:d1d39f3d-317e-4a91-ad40-ad18bbbf4079

► In industry, fired heaters are used to heat process fluids and to generate steam. The efficiency of these devices is increased with air preheating. Gnerally,… (more)

Subjects/Keywords: Fluid mechanics; diffuser; centrifugal fan; energy; heat transfer

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APA (6^th Edition):

Bijvoet, B. (. (2019). Design and characterization of test facility for large angle diffusers. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:d1d39f3d-317e-4a91-ad40-ad18bbbf4079

Chicago Manual of Style (16^th Edition):

Bijvoet, Bastiaan (author). “Design and characterization of test facility for large angle diffusers.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:d1d39f3d-317e-4a91-ad40-ad18bbbf4079.

MLA Handbook (7^th Edition):

Bijvoet, Bastiaan (author). “Design and characterization of test facility for large angle diffusers.” 2019. Web. 17 Jan 2021.

Vancouver:

Bijvoet B(. Design and characterization of test facility for large angle diffusers. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:d1d39f3d-317e-4a91-ad40-ad18bbbf4079.

Council of Science Editors:

Bijvoet B(. Design and characterization of test facility for large angle diffusers. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:d1d39f3d-317e-4a91-ad40-ad18bbbf4079

Delft University of Technology

23. Anselmi, Luca (author). Computational analysis of ducted wind turbines noise.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:fb9c7edd-8011-428e-bd77-f0e80e7bb60f

► As the suitable locations for large wind farms in the mainland are limited, wind energy generation in the urban environment is gaining interest. The Diffuser… (more)

▼ As the suitable locations for large wind farms in the mainland are limited, wind energy generation in the urban environment is gaining interest. The Diffuser Augmented Wind Turbine (DAWT) is a promising concept where the turbine is embedded into an airfoil-shaped diffuser (also named shroud or duct), which has the function of increasing the mass flow across the rotor. Such device is designed to overcome the low wind speed present in urban locations. Noise regulations represent a limit to the installation of wind turbines in urban areas. To the author’s knowledge, the far-field noise generated by DAWTs has been investigated only by Hashem et al. [31], who reported noise increase up to 20 dB compared to unaugmented turbines. However, the noise generation mechanisms are not clear yet. Furthermore, only partial data [15] on the fluid-dynamic behaviour of DAWT when operating in yawed inflow conditions are present, with no information on the noise pattern. The current study investigates both the fluid-dynamic and acoustic fields for a ducted wind turbine using a computational approach. The commercial DonQi turbine is taken as reference. The fluid-dynamic flow field is computed using the Lattice-Boltzmann Method solver Exa PowerFLOW. The Ffowcs-Williams and Hawkings (FW-H) analogy is employed to compute the far-field noise. Three cases are investigated: the ducted turbine at 0 deg and 7.5 deg yaw angles and the unducted turbine at 0 deg yaw angle. The fluid-dynamic analysis reveals that the presence of the diffuser accelerates the flow in the tip region, resulting in a significant increase of the thrust and the power produced by the turbine. In correspondence, the tip vortices present a higher intensity. These vortices interact with the boundary layer of the diffuser and form long vortical structures convected beyond the diffuser trailing edge. The presence of a yaw angle creates a non-axisymmetrical velocity pattern at the rotor disk, resulting in a power drop of 10.8%. However, no stall on the blades is detected. Contrarily to the observations by Cresswell et al., a separation region is formed on the diffuser suction side. Regarding the far-field noise, the directivity pattern for the unducted turbine presents a zone of low noise above the rotor. The addition of a diffuser causes a noise increase by approximately 5 dB upwind and downwind and by up to 15 dB in the low noise region, resulting in a more uniform noise distribution. This effect is ascribed to the higher flow speed in the tip region and to the diffraction of acoustic waves by the diffuser. Increasing the yaw angle to 7.5± is found not to have a relevant impact on the far-field noise. Advisors/Committee Members: Avallone, Francesco (mentor), Casalino, Damiano (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Diffuser Augmented Wind Turbines; Lattice-Boltzmann Methods; Noise; Windenergy

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Anselmi, L. (. (2017). Computational analysis of ducted wind turbines noise. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:fb9c7edd-8011-428e-bd77-f0e80e7bb60f

Chicago Manual of Style (16^th Edition):

Anselmi, Luca (author). “Computational analysis of ducted wind turbines noise.” 2017. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:fb9c7edd-8011-428e-bd77-f0e80e7bb60f.

MLA Handbook (7^th Edition):

Anselmi, Luca (author). “Computational analysis of ducted wind turbines noise.” 2017. Web. 17 Jan 2021.

Vancouver:

Anselmi L(. Computational analysis of ducted wind turbines noise. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:fb9c7edd-8011-428e-bd77-f0e80e7bb60f.

Council of Science Editors:

Anselmi L(. Computational analysis of ducted wind turbines noise. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:fb9c7edd-8011-428e-bd77-f0e80e7bb60f

University of Illinois – Urbana-Champaign

24. Nortrup, Eric S. CFD study of diffuser geometry effects on diffuser augmented wind turbine performance.

Degree: MS, 0133, 2010, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/16977

► This thesis aims to explore the performance limits of diffuser augmented wind turbines. Many studies of this topic have been performed in the past. Limiting… (more)

Subjects/Keywords: Diffuser augmented wind turbine (DAWT)

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APA (6^th Edition):

Nortrup, E. S. (2010). CFD study of diffuser geometry effects on diffuser augmented wind turbine performance. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/16977

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nortrup, Eric S. “CFD study of diffuser geometry effects on diffuser augmented wind turbine performance.” 2010. Thesis, University of Illinois – Urbana-Champaign. Accessed January 17, 2021. http://hdl.handle.net/2142/16977.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nortrup, Eric S. “CFD study of diffuser geometry effects on diffuser augmented wind turbine performance.” 2010. Web. 17 Jan 2021.

Vancouver:

Nortrup ES. CFD study of diffuser geometry effects on diffuser augmented wind turbine performance. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2010. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/2142/16977.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nortrup ES. CFD study of diffuser geometry effects on diffuser augmented wind turbine performance. [Thesis]. University of Illinois – Urbana-Champaign; 2010. Available from: http://hdl.handle.net/2142/16977

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New Mexico

25. Zheng, Lin. A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry.

Degree: Mechanical Engineering, 2015, University of New Mexico

URL: http://hdl.handle.net/1928/25765

► As part of its nuclear nonproliferation mission, the U.S. Department of Energys Global Threat Reduction Initiative (GTRI) is working to develop a sustainable means for… (more)

▼ As part of its nuclear nonproliferation mission, the U.S. Department of Energys Global Threat Reduction Initiative (GTRI) is working to develop a sustainable means for producing the critical medical isotope molybdenum-99 (99Mo) without using highly enriched uranium (HEU). 99Mo is the parent product of technetium\xad99m (99mTc), a radioisotope used in approximately 50,000 medical diagnostic tests per day in the U.S. The primary uses of this product include detection of heart disease, cancer, study of organ structure and function, and other applications. 99Mo has a short half-life (66 hours) and cannot be stockpiled. U.S. demand is approximately 50% of the world market. The objective of the domestic 99Mo project is to accelerate existing commercial projects to meet at least 100% of the U.S. demand of 99Mo produced without HEU by the end of 2016. New methods for generating 99Mo are being explored in an effort to eliminate proliferation issues and provide a domestic supply of 99mTc for medical imaging within the United States. For this project, electron accelerating technology is used by sending an electron beam through a series of 100Mo targets. During this process a large amount of heat is created, which directly affects the operating temperature set for the system. The wall temperature along the target section must be maintained between 550 \u2103 and 650 \u2103. This temperature range is dictated by the tensile stress limit of the wall material. To maintain the required temperature range, helium gas is used to server as a cooling agent that flows through narrow channels between the target disks. This thesis investigated the cooling performance on a series of new geometry designs of the cooling channel by using Computational Fluid Dynamics (CFD) software ANSYS FLUENT 14.5. An experiment was also conducted to conclude whether the CFD model is valid and able to predict the right physics of the cooling channels. As a result, a new optimal geometry for the cooling channels will be selected for the purpose of the 99Mo project.' Advisors/Committee Members: Vorobieff, Peter, Vorobieff, Peter, Poroseva, Svetlana, Olivas, Eric.

Subjects/Keywords: Molybdenum-99; Diffuser; Circulation; computational fluid dynamics; 3D Modeling; LANL

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APA (6^th Edition):

Zheng, L. (2015). A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry. (Masters Thesis). University of New Mexico. Retrieved from http://hdl.handle.net/1928/25765

Chicago Manual of Style (16^th Edition):

Zheng, Lin. “A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry.” 2015. Masters Thesis, University of New Mexico. Accessed January 17, 2021. http://hdl.handle.net/1928/25765.

MLA Handbook (7^th Edition):

Zheng, Lin. “A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry.” 2015. Web. 17 Jan 2021.

Vancouver:

Zheng L. A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry. [Internet] [Masters thesis]. University of New Mexico; 2015. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/1928/25765.

Council of Science Editors:

Zheng L. A 3D Computational Fluid Dynamics Model Validation for Candidate Molybdenum-99 Target Geometry. [Masters Thesis]. University of New Mexico; 2015. Available from: http://hdl.handle.net/1928/25765

Brno University of Technology

26. Strmiska, Michal. Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/11371

► This diploma thesis deals with the area of ejectors. In the intoduction, an ejector is classed as an hydraulic machine. There is also an introduction… (more)

Subjects/Keywords: Ejektor; tryska; savka; proudové čerpadlo; Ejector; nozzle; diffuser; flow; jet; pump

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APA (6^th Edition):

Strmiska, M. (2019). Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/11371

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Strmiska, Michal. “Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model.” 2019. Thesis, Brno University of Technology. Accessed January 17, 2021. http://hdl.handle.net/11012/11371.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Strmiska, Michal. “Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model.” 2019. Web. 17 Jan 2021.

Vancouver:

Strmiska M. Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/11012/11371.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Strmiska M. Experimentální ověření ejektoru a vytvoření matematického modelu.: Experimental verification of ejector and creation of mathematical model. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/11371

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

27. Egorov, Artemii. Aerodynamika ve Formuli Student: Formula Student aerodynamics.

Degree: 2017, Brno University of Technology

URL: http://hdl.handle.net/11012/66986

► This bachelor thesis focuses on summarizing knowledge in the field of aerodynamic elements development on formula student cars. The introductory part deals with an overview… (more)

Subjects/Keywords: Bočnice; CFD; Difuzor; Přítlačná křídla; CFD; Diffuser Inverted wings; Sidepods

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APA (6^th Edition):

Egorov, A. (2017). Aerodynamika ve Formuli Student: Formula Student aerodynamics. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/66986

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Egorov, Artemii. “Aerodynamika ve Formuli Student: Formula Student aerodynamics.” 2017. Thesis, Brno University of Technology. Accessed January 17, 2021. http://hdl.handle.net/11012/66986.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Egorov, Artemii. “Aerodynamika ve Formuli Student: Formula Student aerodynamics.” 2017. Web. 17 Jan 2021.

Vancouver:

Egorov A. Aerodynamika ve Formuli Student: Formula Student aerodynamics. [Internet] [Thesis]. Brno University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/11012/66986.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Egorov A. Aerodynamika ve Formuli Student: Formula Student aerodynamics. [Thesis]. Brno University of Technology; 2017. Available from: http://hdl.handle.net/11012/66986

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Saskatchewan

28. Boyko, Michael 1990-. Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects.

Degree: 2018, University of Saskatchewan

URL: http://hdl.handle.net/10388/10728

► Vacuum fans are a critical component of planters used to draw seeds to a rotating perforated disc for precision sowing. As seeds adhere to the… (more)

▼ Vacuum fans are a critical component of planters used to draw seeds to a rotating perforated disc for precision sowing. As seeds adhere to the disc it is possible for the coatings to become dislodged, pass through the vacuum fan, and be exhausted into the surroundings. To minimize the possible environmental effects from the fan exhaust, the International Organization for Standardization (ISO) passed the ISO 17962 standard. It sets limits on the air velocity measured at a 2 m radius from the fan, and specifies that the exhaust from the fan must be directed groundward. In partnership with CNH Industrial, research was performed to assess the ability of the CNH Industrial vacuum fan to meet this standard. The research had two main goals: to determine if the vacuum fan could meet the standard, and to show that computational fluid dynamics (CFD) could be an effective tool for measuring compliance with the standard. The first part of the project was to experimentally determine the ability of the fan to meet the standard. This was accomplished by building and testing three fan configurations using the parameters specified in the ISO standard. The first configuration was inverting the fan to direct its exhaust groundward. The second was attaching a two-dimensional (2D) square diffuser to the fan, which reduced the exhaust velocity and redirected it to the ground. The third was attaching a manifold diffuser to the fan, which divided the exhaust into multiple slower exhaust jets, directed towards the ground. Results from all three configurations indicated exhaust velocities that were measured to be below the ISO standard thresholds (less than 2 m/s or 4 m/s, depending on measurement elevation, with the higher velocity limit imposed closer to the ground). The second part of the project was to create CFD simulations of the inverted fan and 2D square diffuser configurations, and compare them to the experimental results. The models were able to predict the locations and magnitudes of peak velocities around both configurations. This showed that CFD could be an effective tool for measuring standard compliance. Finally, the CFD models were used to compare the inverted fan to the 2D square diffuser, in terms of impact on the surroundings. It was found that by reducing the fan exhaust velocity, less air would become entrained by the exhaust jet, indicating a reduced likelihood of spreading fugitive seed coatings. Also, the slow exhaust jet would create less of a disturbance when impinging upon the ground. Advisors/Committee Members: Bergstrom, Donald, Roberge, Martin, Cree, Duncan, Sumner, David, Meda , Venkatesh, Soltan, Jafar.

Subjects/Keywords: Fluid Mechanics; CFD; Agricultural Machinery; Diffuser Design; Environment; Agriculture; Centrifugal Fan

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APA (6^th Edition):

Boyko, M. 1. (2018). Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/10728

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Boyko, Michael 1990-. “Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects.” 2018. Thesis, University of Saskatchewan. Accessed January 17, 2021. http://hdl.handle.net/10388/10728.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Boyko, Michael 1990-. “Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects.” 2018. Web. 17 Jan 2021.

Vancouver:

Boyko M1. Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects. [Internet] [Thesis]. University of Saskatchewan; 2018. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10388/10728.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Boyko M1. Minimizing Planter Fan Exhaust Velocity to Reduce Environmental Effects. [Thesis]. University of Saskatchewan; 2018. Available from: http://hdl.handle.net/10388/10728

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

29. Gantzer, Paul Anthony. Diffuser Operations at Spring Hollow Reservoir.

Degree: MS, Civil Engineering, 2002, Virginia Tech

URL: http://hdl.handle.net/10919/33052

► Stratification is a natural occurrence in deep lakes and reservoirs. This phenomenon results in two distinct layers, the warmer, less dense epilimnion on top and… (more)

Subjects/Keywords: Oxygenation; Thermocline; Diffuser; Hypolimnion; Aeration

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APA (6^th Edition):

Gantzer, P. A. (2002). Diffuser Operations at Spring Hollow Reservoir. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/33052

Chicago Manual of Style (16^th Edition):

Gantzer, Paul Anthony. “Diffuser Operations at Spring Hollow Reservoir.” 2002. Masters Thesis, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/33052.

MLA Handbook (7^th Edition):

Gantzer, Paul Anthony. “Diffuser Operations at Spring Hollow Reservoir.” 2002. Web. 17 Jan 2021.

Vancouver:

Gantzer PA. Diffuser Operations at Spring Hollow Reservoir. [Internet] [Masters thesis]. Virginia Tech; 2002. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/33052.

Council of Science Editors:

Gantzer PA. Diffuser Operations at Spring Hollow Reservoir. [Masters Thesis]. Virginia Tech; 2002. Available from: http://hdl.handle.net/10919/33052

Virginia Tech

30. Ferrar, Anthony Maurice. Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets.

Degree: MS, Mechanical Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/36408

► Highly integrated airframe-propulsion systems featuring ingestion of the airframe boundary layer oer reduced noise, emissions, and fuel consumption. Embedded engine systems are envisioned which require… (more)

▼ Highly integrated airframe-propulsion systems featuring ingestion of the airframe boundary layer oer reduced noise, emissions, and fuel consumption. Embedded engine systems are envisioned which require boundary layer ingesting (BLI) serpentine inlets to provide the needed air ow to the engine. These inlets produce distorted ow proles that can cause aeromechanical, stability, and performance changes in embedded engines. Proper design of embedded engine systems requires understanding of the underlying uid dynamics that occur within serpentine inlets. A serpentine inlet was tested in a specially designed wind tunnel that simulated boundary layer ingestion in a full-scale realistic environment. The measured total pressure proles at the inlet and exit planes of the duct, and the static pressure distributions along the walls provided useful data related to the ow in BLI serpentine inlet systems. A bleed ow control system was tested that utilized no more than 2% of the total inlet ow. Two bleed slots were employed, one near the rst bend of the S-duct and one near second. The bleed system successfully reduced inlet distortions by as much as 30%, implying improvements in stall margin and engine performance. Analysis of the wake shape entering the S-duct showed that the airframe and inlet duct are both important components of a wake-ingesting inlet/diusion system. Shape eects and static pressure distributions determined ow transport within the serpentine inlet. Flow separation within the S-duct increased distortion at the engine inlet plane. Discussion of airframe/inlet/engine compatibility demonstrates that embedded engine systems require multi-disciplinary collaborative design eorts. An included fundamental analysis provides performance estimates and design guidelines. The ideal airframe performance improvement associated with wake-ingestion is estimated. Advisors/Committee Members: O'Brien, Walter F. Jr. (committeechair), Tafti, Danesh K. (committee member), Sharma, Om (committee member).

Subjects/Keywords: boundary layer ingestion; wake ingestion; distortion; flow control; diffuser; inlet

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APA (6^th Edition):

Ferrar, A. M. (2011). Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/36408

Chicago Manual of Style (16^th Edition):

Ferrar, Anthony Maurice. “Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets.” 2011. Masters Thesis, Virginia Tech. Accessed January 17, 2021. http://hdl.handle.net/10919/36408.

MLA Handbook (7^th Edition):

Ferrar, Anthony Maurice. “Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets.” 2011. Web. 17 Jan 2021.

Vancouver:

Ferrar AM. Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Jan 17]. Available from: http://hdl.handle.net/10919/36408.

Council of Science Editors:

Ferrar AM. Measurements of Flow in Boundary Layer Ingesting Serpentine Inlets. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/36408

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