3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.6/4931 |
Resumo: | A CFD simulation of a four-stroke opposed piston engine has been performed. It is intended to evaluate the overall behavior and properties of in-cylinder flow, in a way that its use comercialy can be achieved. Due to the inherent characteristics of an opposed piston engine, it is necessary to dimension the model, using as reference the Jumo 205E engine: both valves, as well as the combustion chamber and both exhaust and admission ports. A combustion chamber adjacent to the cylinder zone is placed in order to fit both valves. The commercial software Fluent 14.0 is used to perform the numerical calculations. Due to the complexity of this study, mostly because of the existence of moving parts, the use o dynamic meshing is necessary. The viscous model is Standard K-E; the port entry and exit are defined as pressure-inlet and pressureoutlet, respectively. PISO and PRESTO! are the chosen methods for pressure-velocity coupling and pressure space discretization, respectively. The final results obtained were far from the expected, mainly due to the inadequate behavior and properties of the fluid within the cylinder and ports. |
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3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston EngineAdmissionCfdExhaustFluentInternal Combustion EngineOpposed PistonDomínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e TecnologiasA CFD simulation of a four-stroke opposed piston engine has been performed. It is intended to evaluate the overall behavior and properties of in-cylinder flow, in a way that its use comercialy can be achieved. Due to the inherent characteristics of an opposed piston engine, it is necessary to dimension the model, using as reference the Jumo 205E engine: both valves, as well as the combustion chamber and both exhaust and admission ports. A combustion chamber adjacent to the cylinder zone is placed in order to fit both valves. The commercial software Fluent 14.0 is used to perform the numerical calculations. Due to the complexity of this study, mostly because of the existence of moving parts, the use o dynamic meshing is necessary. The viscous model is Standard K-E; the port entry and exit are defined as pressure-inlet and pressureoutlet, respectively. PISO and PRESTO! are the chosen methods for pressure-velocity coupling and pressure space discretization, respectively. The final results obtained were far from the expected, mainly due to the inadequate behavior and properties of the fluid within the cylinder and ports.É realizada uma simulação em CFD de um motor de pistão oposto a funcionar num ciclo de quatro tempos. Pretende-se avaliar o comportamento e as propriedades do escoamento dentro do cilindro, de forma a viabilizar o seu uso a nível comercial. Devido às características inerentes de um motor de pistão oposto, torna-se assim necessário dimensionar o modelo, tendo como referência o motor Jumo 205E: ambas as válvulas, bem como a câmara de combustão e as portas de escape e admissão. Uma câmara de combustão adjacente à zona do cilindro é criada de modo a poder colocar as válvulas. O software comercial Fluent 14.0 é escolhido para realizar os cálculos numéricos. Dada a complexidade do estudo, maioritariamente devido às partes móveis existentes, o uso da malha dinâmica é necessária. O modelo Standard K-E é o escolhido para o modelo da viscosidade; as portas de entrada e saída de ar são definidas como pressureinlet e pressure-outlet, respetivamente. PISO e PRESTO! são os métodos de cálculo usados para o acoplamento pressão-velocidade e discretização pressão, respetivamente. Os resultados obtidos não foram os esperados, dado o comportamento e propriedades inadequados do fluido no cilindro e portas.Brojo, Francisco Miguel Ribeiro ProençauBibliorumGonçalves, Robert Silva2018-07-10T14:15:38Z2014-11-112014-10-12014-11-11T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.6/4931TID:201326205enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-15T09:42:23Zoai:ubibliorum.ubi.pt:10400.6/4931Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:45:57.400770Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
title |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
spellingShingle |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine Gonçalves, Robert Silva Admission Cfd Exhaust Fluent Internal Combustion Engine Opposed Piston Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias |
title_short |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
title_full |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
title_fullStr |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
title_full_unstemmed |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
title_sort |
3D CFD Simulation of a Cold Flow Four-Stroke Opposed Piston Engine |
author |
Gonçalves, Robert Silva |
author_facet |
Gonçalves, Robert Silva |
author_role |
author |
dc.contributor.none.fl_str_mv |
Brojo, Francisco Miguel Ribeiro Proença uBibliorum |
dc.contributor.author.fl_str_mv |
Gonçalves, Robert Silva |
dc.subject.por.fl_str_mv |
Admission Cfd Exhaust Fluent Internal Combustion Engine Opposed Piston Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias |
topic |
Admission Cfd Exhaust Fluent Internal Combustion Engine Opposed Piston Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias |
description |
A CFD simulation of a four-stroke opposed piston engine has been performed. It is intended to evaluate the overall behavior and properties of in-cylinder flow, in a way that its use comercialy can be achieved. Due to the inherent characteristics of an opposed piston engine, it is necessary to dimension the model, using as reference the Jumo 205E engine: both valves, as well as the combustion chamber and both exhaust and admission ports. A combustion chamber adjacent to the cylinder zone is placed in order to fit both valves. The commercial software Fluent 14.0 is used to perform the numerical calculations. Due to the complexity of this study, mostly because of the existence of moving parts, the use o dynamic meshing is necessary. The viscous model is Standard K-E; the port entry and exit are defined as pressure-inlet and pressureoutlet, respectively. PISO and PRESTO! are the chosen methods for pressure-velocity coupling and pressure space discretization, respectively. The final results obtained were far from the expected, mainly due to the inadequate behavior and properties of the fluid within the cylinder and ports. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-11-11 2014-10-1 2014-11-11T00:00:00Z 2018-07-10T14:15:38Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.6/4931 TID:201326205 |
url |
http://hdl.handle.net/10400.6/4931 |
identifier_str_mv |
TID:201326205 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799136356670111744 |