3D-CFD analysis of a high performance hydrogen fuelled engine
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/34366 |
Resumo: | Regarding carbon dioxide emissions, they would not be a problem on an internal combustion engine fuelled with hydrogen, since there is no carbon in the combustion reactants. Besides, the combustion properties of hydrogen are highly promising. However, the conversion of a gasoline engine to be run on hydrogen is not direct, due to technological concerns derived from hydrogen particularities. Furthermore, nitrogen oxides are still part of the reaction by-products, although their production can be controlled depending on factors as equivalence ratio and the top temperature achieved inside the combustion chamber. This work aimed at performing three-dimensional computational fluid dynamics analysis of a cylinder unit of a recent production high-performance gasoline direct injection engine, although fuelled with hydrogen. Literature review allowed to find the strengths and weaknesses of several strategies. Once direct injection of hydrogen was selected as a must-have, simulations with two different overall lean mixtures, across a range of spark timings, provided trends of performance and emissions. Still, due to the requirement of high power output of the high-performance engine, these were not ultra-lean emission-free mixtures, for which also all sorts of abnormal combustion events would be avoided. By analysing the simulation results, subsequent study directions can be established, being water injection into the cylinder and mixture formation improvement the follow-up steps to implement... |
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3D-CFD analysis of a high performance hydrogen fuelled engineInternal combustion engineHydrogenDirect injection computational fluid dynamicsLean mixtureNOx emissionsRegarding carbon dioxide emissions, they would not be a problem on an internal combustion engine fuelled with hydrogen, since there is no carbon in the combustion reactants. Besides, the combustion properties of hydrogen are highly promising. However, the conversion of a gasoline engine to be run on hydrogen is not direct, due to technological concerns derived from hydrogen particularities. Furthermore, nitrogen oxides are still part of the reaction by-products, although their production can be controlled depending on factors as equivalence ratio and the top temperature achieved inside the combustion chamber. This work aimed at performing three-dimensional computational fluid dynamics analysis of a cylinder unit of a recent production high-performance gasoline direct injection engine, although fuelled with hydrogen. Literature review allowed to find the strengths and weaknesses of several strategies. Once direct injection of hydrogen was selected as a must-have, simulations with two different overall lean mixtures, across a range of spark timings, provided trends of performance and emissions. Still, due to the requirement of high power output of the high-performance engine, these were not ultra-lean emission-free mixtures, for which also all sorts of abnormal combustion events would be avoided. By analysing the simulation results, subsequent study directions can be established, being water injection into the cylinder and mixture formation improvement the follow-up steps to implement...No que diz respeito a emissões de dióxido de carbono, estas não são um problema num motor de combustão interna cujo combustível é o hidrogénio, uma vez que não há carbono nos reagentes de combustão. Adicionalmente, as propriedades de combustão do hidrogénio são altamente promissoras. No entanto, a conversão de um motor a gasolina para hidrogénio não é direta, devido a alguns desafios tecnológicos derivados de especificidades do hidrogénio. Além do mais, os óxidos de azoto continuam a ser parte dos produtos de combustão, podendo a sua produção ser controlada dependendo de fatores como a riqueza da mistura e a temperatura máxima atingida pelos gases na câmara de combustão. Com este trabalho pretende-se fazer uma análise CFD tridimensional de um cilindro de um motor de alta performance com injeção direta de gasolina, de produção corrente, usando o hidrogénio como combustível. A revisão de literatura permitiu estabelecer os prós e contras de várias estratégias. A injeção direta de hidrogénio no cilindro foi considerada essencial, tendo dois casos com misturas globalmente pobres e diferentes temporizações de ignição permitindo observar tendências de performance e emissões. No entanto, não foram considerados regimes de mistura extremamente pobre. Embora estes pudessem eliminar completamente emissões e eventos de combustão anormal, não possibilitariam alcançar elevadas potências, requisito para o motor de alta performance. A análise dos resultados permite identificar caminhos para investigação futura, sendo a injeção de água no cilindro e a melhoria da distribuição da mistura os passos seguintes a procurar implementar...2022-08-02T09:12:42Z2022-07-21T00:00:00Z2022-07-21info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/34366engFerreira, João Eduardo Motainfo: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:RCAAP2024-02-22T12:06:25Zoai:ria.ua.pt:10773/34366Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:05:44.169908Repositório 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 analysis of a high performance hydrogen fuelled engine |
title |
3D-CFD analysis of a high performance hydrogen fuelled engine |
spellingShingle |
3D-CFD analysis of a high performance hydrogen fuelled engine Ferreira, João Eduardo Mota Internal combustion engine Hydrogen Direct injection computational fluid dynamics Lean mixture NOx emissions |
title_short |
3D-CFD analysis of a high performance hydrogen fuelled engine |
title_full |
3D-CFD analysis of a high performance hydrogen fuelled engine |
title_fullStr |
3D-CFD analysis of a high performance hydrogen fuelled engine |
title_full_unstemmed |
3D-CFD analysis of a high performance hydrogen fuelled engine |
title_sort |
3D-CFD analysis of a high performance hydrogen fuelled engine |
author |
Ferreira, João Eduardo Mota |
author_facet |
Ferreira, João Eduardo Mota |
author_role |
author |
dc.contributor.author.fl_str_mv |
Ferreira, João Eduardo Mota |
dc.subject.por.fl_str_mv |
Internal combustion engine Hydrogen Direct injection computational fluid dynamics Lean mixture NOx emissions |
topic |
Internal combustion engine Hydrogen Direct injection computational fluid dynamics Lean mixture NOx emissions |
description |
Regarding carbon dioxide emissions, they would not be a problem on an internal combustion engine fuelled with hydrogen, since there is no carbon in the combustion reactants. Besides, the combustion properties of hydrogen are highly promising. However, the conversion of a gasoline engine to be run on hydrogen is not direct, due to technological concerns derived from hydrogen particularities. Furthermore, nitrogen oxides are still part of the reaction by-products, although their production can be controlled depending on factors as equivalence ratio and the top temperature achieved inside the combustion chamber. This work aimed at performing three-dimensional computational fluid dynamics analysis of a cylinder unit of a recent production high-performance gasoline direct injection engine, although fuelled with hydrogen. Literature review allowed to find the strengths and weaknesses of several strategies. Once direct injection of hydrogen was selected as a must-have, simulations with two different overall lean mixtures, across a range of spark timings, provided trends of performance and emissions. Still, due to the requirement of high power output of the high-performance engine, these were not ultra-lean emission-free mixtures, for which also all sorts of abnormal combustion events would be avoided. By analysing the simulation results, subsequent study directions can be established, being water injection into the cylinder and mixture formation improvement the follow-up steps to implement... |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-08-02T09:12:42Z 2022-07-21T00:00:00Z 2022-07-21 |
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/10773/34366 |
url |
http://hdl.handle.net/10773/34366 |
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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1799137712530259968 |