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Emission characteristics of a liquid spray sudden expansion combustor using computational fluid dynamics
Title
Emission characteristics of a liquid spray sudden expansion combustor using computational fluid dynamics.
Creator
Rodriguez, Daniel, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
A sudden expansion combustor (SUE) is analyzed using computation fluid dynamics (CFD). CO emissions and NOx emissions are computed for various operating conditions of the SUE combustor using a can type and an annular type geometrical configurations. The goal of this thesis is to see if the SUE combustor is a viable alternative to conventional combustors which utilize swirlers. It is found that for the can type combustor the NOx emissions were quite low compared to other combustor types but...
Show moreA sudden expansion combustor (SUE) is analyzed using computation fluid dynamics (CFD). CO emissions and NOx emissions are computed for various operating conditions of the SUE combustor using a can type and an annular type geometrical configurations. The goal of this thesis is to see if the SUE combustor is a viable alternative to conventional combustors which utilize swirlers. It is found that for the can type combustor the NOx emissions were quite low compared to other combustor types but the CO emissions were fairly high. The annular combustor shows better CO emissions compared to the can type, but the CO emissions are still high compared to other combustors. Emissions can be improved by providing better mixing in the primary combustion zone. The SUE combustor design needs to be further refined in order for it to be a viable alternative to conventional combustors with swirlers.
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Date Issued
2013
PURL
http://purl.flvc.org/fcla/dt/3362574
Subject Headings
Fluid dynamics, Data processing, Fluid dynamics, Mathematical models, Computational fluid dynamics, Diffusers, Fluid dynamics
Format
Document (PDF)
Numerical Simulation of a Flowfield Around a Hypersonic Missile with Lateral Jets
Title
Numerical Simulation of a Flowfield Around a Hypersonic Missile with Lateral Jets.
Creator
Rodriguez, Daniel, Moslemian, Davood, Florida Atlantic University, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
This work uses computational fluid dynamics to study the flowfield around a hypersonic missile with two lateral jets to provide control in place of control surfaces. The jets exhaust an H2-O2 mixture at Mach number of 2.9 with a jet pressure ratio of roughly 10,500. The jets are staggered axially and circumferentially in such a way to produce pitch and yaw. The flowfield of such a jet configuration is characterized at several angles of attack and the corresponding force coefficients and...
Show moreThis work uses computational fluid dynamics to study the flowfield around a hypersonic missile with two lateral jets to provide control in place of control surfaces. The jets exhaust an H2-O2 mixture at Mach number of 2.9 with a jet pressure ratio of roughly 10,500. The jets are staggered axially and circumferentially in such a way to produce pitch and yaw. The flowfield of such a jet configuration is characterized at several angles of attack and the corresponding force coefficients and amplification factors are provided. The freestream air and H2-O2 plume is treated as inert for the majority of the calculations. Special cases are treated with finite rate chemical kinetics and compared to the inert flowfield to ascertain the effects that chemical reactions have on the force coefficients. It was found that the flowfield was only slightly altered from the familiar one jet flowfield when the second jet is active. The flow topology and vortex structures tend to shift towards the second jet but the overall structure remains the same. The normal force amplification factors are close to unity over the range of angle of attack due to the thrust being so high with the two jet configuration having a lower amplification factor compared to firing a single jet. Treating the flowfield as chemically reacting did not affect the force values much: the difference being 0.3% for an angle of attack of 0°.
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Date Issued
2017
PURL
http://purl.flvc.org/fau/fd/FA00004893, http://purl.flvc.org/fau/fd/FA00004893
Subject Headings
Aerodynamics, Hypersonic., Nonequilibrium thermodynamics., Aerothermodynamics--Mathematica., Hypersonic planes--Design and construction--Mathematical models., Vortex-motion--Mathematical models.
Format
Document (PDF)
Cruise Report. Cuba's Twilight Zone Reefs: Remotely Operated Vehicle Surveys of Deep/Mesophotic Coral Reefs and Associated Fish Communities of Cuba
Title
Cruise Report. Cuba's Twilight Zone Reefs: Remotely Operated Vehicle Surveys of Deep/Mesophotic Coral Reefs and Associated Fish Communities of Cuba.
Creator
Reed, John K., Farrington, Stephanie, Gonzalez-Diaz, Patricia, Lopez, Linnet Busutil, Martínez-Daranas, Beatriz, Cobián Rojas, Dorka, Voss, Joshua, Hanisak, M. Dennis, Diaz, Maria Cristina, Jiang, Mingshun, Studivan, Michael, David, Andrew, Drummond, Felicia, Mendez, Juliett Gonzalez, Garcia Rodriguez, Alain, González-Sanchez, Patricia M., Fernández, Jorge Viamontes, Pérez, Daniel Estrada, Horn, Lance, White, Jason, Pomponi, Shirley A.
Abstract/Description
The purpose of this research cruise was to discover and characterize, for the first time, the extent of mesophotic reefs along the entire coastline of Cuba, and to compare the health and connectivity (physical, genetic and ecological) among both mesophotic and previously well-characterized shallow reef systems in Cuba, the southeastern United States, and Gulf of Mexico (in particular, the FGBNMS and FKNMS). Moreover, the project will directly address a recommendation in the Report from...
Show moreThe purpose of this research cruise was to discover and characterize, for the first time, the extent of mesophotic reefs along the entire coastline of Cuba, and to compare the health and connectivity (physical, genetic and ecological) among both mesophotic and previously well-characterized shallow reef systems in Cuba, the southeastern United States, and Gulf of Mexico (in particular, the FGBNMS and FKNMS). Moreover, the project will directly address a recommendation in the Report from MarCuba (2015) in which the U.S. and Cuban participants in this project stated their intention to initiate an international collaboration.
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Date Issued
2017-10-31
PURL
http://purl.flvc.org/fau/fd/FAUIR000226
Format
Citation
Cuba's Mesophotic Coral Reefs and Associated Fish Communities
Title
Cuba's Mesophotic Coral Reefs and Associated Fish Communities.
Creator
Reed, John K., Gonzalez-Diaz, Patricia, Busutil, Linnet, Farrington, Stephanie, Martínez-Daranas, Beatriz, Cobián Rojas, Dorka, Voss, Joshua, Diaz, Maria Cristina, David, Andrew, Hanisak, M. Dennis, Mendez, Juliett Gonzalez, Garcia Rodriguez, Alain, González-Sanchez, Patricia M., Viamontes Fernandez, Jorge, Estrada Perez, Daniel, Studivan, Michael, Drummond, Felicia, Jiang, Mingshun, Pomponi, Shirley A.
Date Issued
2018
PURL
http://purl.flvc.org/fau/fd/FAUIR000351
Format
Citation
FAU Climate Change Initiative Priority Theme: Research, Engineering, and Adaption to a Change Climate
Title
FAU Climate Change Initiative Priority Theme: Research, Engineering, and Adaption to a Change Climate.
Creator
Berry, Leonard, Koch, Marguerite, Center for Environmental Studies, Benscoter, Brian, Comas, Xavier, Devlin, Donna, Fadiman, Maria, Gerstein, E., Herzing, Denise L., Hindle, Tobin, Milton, Sarah L., Oleinik, Anton E., Proffitt, C. Edward, Restrepo, Jorge I., Root, Tara L., Wyneken, Jeanette, Xie, Zhixiao, Zhang, Xing-Hai, Esnard, Ann-Margaret, Mitsova, Diana, Murley, J., Vos, J., Escaleras, Monica, Mehallis, M., Shaw, Eric H., Hardman, Guillermo [John], Lambert, Julie, Thomas, G., Arockiasamy, Madasamy, Bloetscher, Frederick, Carvalho, G., Dhanak, Manhar R., Frisk, George V., Kaisar, Evangelos I., Kalva, Hari, Meeroff, Daniel E., Rodriguez, Jarice, Scarlatos, Panagiotis (Pete) D., Shankar, Ravi, Teegavarapu, Ramesh, Brown, Clifford T., McAfee, Francis, Widener, Patricia, Dalgleish, Fraser R., Hanisak, M. Dennis, McMulloch, S., O'Corry-Crowe, Gregory, Pomponi, Shirley A., Reed, John K., Scarpa, John, Voss, Joshua, Heimlich, Barry N., Alvarez, R., Jolley, J., Edwards, A., Charles E. Schmidt College of Science, Harbor Branch Oceanographic Institute, College of Business, Dorothy F. Schmidt College of Arts and Letters, College of Education, College of Engineering and Computer Science
Date Issued
2010
PURL
http://purl.flvc.org/fau/fd/FA00003457
Format
Citation