Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm
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/10400.6/13017 |
Resumo: | Since the beginning of jet flight, the intake has been subject to many studies due to its importance. From its position on the wings, in the wing root, nose and being mounted on the fuselage, many decades were spent on the research and solution of constraints. These are still present in the form of space and weight saving, lower drag, centre of gravity, lower radar visibility, etc. Although theoretically intakes with an infinite number of weak shocks are better, these fail to produce better results. An intake with small number of shocks is preferred as it is smaller in size, thus saving weight, and has better off-design performance. In the present work, a bi-dimensional mixed compression intake is designed having the Panavia’s Tornado engine requirements in mind and the aircrafts performance values. The designed intake results were in line with other studies. A comparison is made between the parametrical result and the results of a genetic optimization algorithm to minimize length and maximize total pressure recovery (thus saving weight while having high performance) by using a variation on Mach numbers around the designated speed for the Tornado, while using a mixed compression intake. Accordingly, a longer intake had better performance, but a shorter intake comes with lower weight. With lower speeds, a higher total pressure recovery and lower length is reached. This, along with the loss of importance of high speeds for most mission profiles, suggests that an aircraft with a lower top speed is advantageous as its weight lowers and performance increases. |
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Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic AlgorithmConduta2-DAdmissão SupersónicaBidimensionalChoques NormaisChoques OblíquosDesignOtimizaçãoProjetoDomínio/Área Científica::Engenharia e Tecnologia::Engenharia AeronáuticaSince the beginning of jet flight, the intake has been subject to many studies due to its importance. From its position on the wings, in the wing root, nose and being mounted on the fuselage, many decades were spent on the research and solution of constraints. These are still present in the form of space and weight saving, lower drag, centre of gravity, lower radar visibility, etc. Although theoretically intakes with an infinite number of weak shocks are better, these fail to produce better results. An intake with small number of shocks is preferred as it is smaller in size, thus saving weight, and has better off-design performance. In the present work, a bi-dimensional mixed compression intake is designed having the Panavia’s Tornado engine requirements in mind and the aircrafts performance values. The designed intake results were in line with other studies. A comparison is made between the parametrical result and the results of a genetic optimization algorithm to minimize length and maximize total pressure recovery (thus saving weight while having high performance) by using a variation on Mach numbers around the designated speed for the Tornado, while using a mixed compression intake. Accordingly, a longer intake had better performance, but a shorter intake comes with lower weight. With lower speeds, a higher total pressure recovery and lower length is reached. This, along with the loss of importance of high speeds for most mission profiles, suggests that an aircraft with a lower top speed is advantageous as its weight lowers and performance increases.Desde as primeiras aeronaves supersónicas, as admissões foram objeto de muitos estudos devido à sua importância. Desde a sua posição nas asas, à sua passagem para as raízes destas, nariz e finalmente a montagem na sua fuselagem, foram necessárias décadas no estudo das admissões e resolução das suas restrições. Estas restrições continuam a estar presentes no projeto, quer sejam em relação ao espaço, peso, arrasto, centro de gravidade, visibilidade no radar, entre outras. Embora admissões com um número infinito de choques fracos sejam teoricamente preferíveis, na prática, uma admissão com um número pequeno de choques é superior, pois é mais leve, devido a menores dimensões, e traz consigo um melhor desempenho em condições off-design. No presente trabalho é projetada uma admissão bi-dimensional com compressão mista, tendo os requisitos de motor e outros constrangimentos do avião Panavia Tornado em mente. Os resultados obtidos são corroborados com resultados obtidos em artigos relacionados e posteriormente comparados com os resultados de uma otimização multiobjectivos para minimizar o comprimento e maximizar a recuperação de pressão total. Deste modo, é possível alcançar um desempenho alto enquanto se mantém o peso baixo. Estes objetivos são alcançados ao usar um intervalo de velocidade próximo da operação do Tornado. De acordo com o esperado, uma admissão com menores dimensões tem uma recuperação total de pressão inferior em condições on-design. No entanto, também é sinónimo de baixo peso estrutural. Outra ligação encontrada é o aumento de recuperação de pressão total em admissões projetadas para menores velocidades, além de um comprimento inferior. Este resultado, além da redução na importância da velocidade máxima da aeronave na maioria dos perfis de missão, sugere que uma aeronave com uma velocidade máxima inferior é vantajosa, pois a sua agilidade e desempenho será superior.Brojo, Francisco Miguel Ribeiro ProençauBibliorumSimão, Diogo Rafael Ribeiro Pinto2023-02-20T09:25:16Z2022-11-212022-09-212022-11-21T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.6/13017TID:203225457enginfo: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:RCAAP2023-12-15T09:56:26Zoai:ubibliorum.ubi.pt:10400.6/13017Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:52:32.231789Repositório 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 |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
title |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
spellingShingle |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm Simão, Diogo Rafael Ribeiro Pinto Conduta 2-D Admissão Supersónica Bidimensional Choques Normais Choques Oblíquos Design Otimização Projeto Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Aeronáutica |
title_short |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
title_full |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
title_fullStr |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
title_full_unstemmed |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
title_sort |
Optimization of a Bi-dimensional Intake for a Supersonic Aircraft Using a Genetic Algorithm |
author |
Simão, Diogo Rafael Ribeiro Pinto |
author_facet |
Simão, Diogo Rafael Ribeiro Pinto |
author_role |
author |
dc.contributor.none.fl_str_mv |
Brojo, Francisco Miguel Ribeiro Proença uBibliorum |
dc.contributor.author.fl_str_mv |
Simão, Diogo Rafael Ribeiro Pinto |
dc.subject.por.fl_str_mv |
Conduta 2-D Admissão Supersónica Bidimensional Choques Normais Choques Oblíquos Design Otimização Projeto Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Aeronáutica |
topic |
Conduta 2-D Admissão Supersónica Bidimensional Choques Normais Choques Oblíquos Design Otimização Projeto Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Aeronáutica |
description |
Since the beginning of jet flight, the intake has been subject to many studies due to its importance. From its position on the wings, in the wing root, nose and being mounted on the fuselage, many decades were spent on the research and solution of constraints. These are still present in the form of space and weight saving, lower drag, centre of gravity, lower radar visibility, etc. Although theoretically intakes with an infinite number of weak shocks are better, these fail to produce better results. An intake with small number of shocks is preferred as it is smaller in size, thus saving weight, and has better off-design performance. In the present work, a bi-dimensional mixed compression intake is designed having the Panavia’s Tornado engine requirements in mind and the aircrafts performance values. The designed intake results were in line with other studies. A comparison is made between the parametrical result and the results of a genetic optimization algorithm to minimize length and maximize total pressure recovery (thus saving weight while having high performance) by using a variation on Mach numbers around the designated speed for the Tornado, while using a mixed compression intake. Accordingly, a longer intake had better performance, but a shorter intake comes with lower weight. With lower speeds, a higher total pressure recovery and lower length is reached. This, along with the loss of importance of high speeds for most mission profiles, suggests that an aircraft with a lower top speed is advantageous as its weight lowers and performance increases. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-11-21 2022-09-21 2022-11-21T00:00:00Z 2023-02-20T09:25:16Z |
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/10400.6/13017 TID:203225457 |
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http://hdl.handle.net/10400.6/13017 |
identifier_str_mv |
TID:203225457 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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