Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions

Detalhes bibliográficos
Ano de defesa: 2012
Autor(a) principal: Luis Gustavo Trapp
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Instituto Tecnológico de Aeronáutica
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Vórtices
Dinâmica dos fluidos computacional
Aerodinâmica
Engenharia aeronáutica
Link de acesso: http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2171
Resumo: Aircraft engines and nacelles operating under crosswind present some design challenges. One of the phenomenon that requires a better comprehension is the vortex that forms between the ground and the engine inlet because this vortex can suck debris into the engine and also affect the engine operability. This work establishes procedures and criteria for using CFD for evaluating crosswind conditions that affect aeronautical engines. A new correlation, the streamtube diameter ratio (SDR), is proposed to predict the inlet vortex appearance and intensity. The different inlet vortices are described in detail, among them the trailing vortex, composed of trailed and ingested parts; and a new vortex, called the feeding vortex. Additionally the interaction between the different vortices is shown, highlighting the importance the nacelle walls have in the strengthening of these vortices. In this process a new analysis methodology is shown, in which the wall boundary conditions used in the CFD analysis are selectively changed between slipping and non-slipping walls, allowing to discover correlations between the different vorticity sources and the vortices'; intensities.
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spelling Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactionsVórticesDinâmica dos fluidos computacionalAerodinâmicaEngenharia aeronáuticaAircraft engines and nacelles operating under crosswind present some design challenges. One of the phenomenon that requires a better comprehension is the vortex that forms between the ground and the engine inlet because this vortex can suck debris into the engine and also affect the engine operability. This work establishes procedures and criteria for using CFD for evaluating crosswind conditions that affect aeronautical engines. A new correlation, the streamtube diameter ratio (SDR), is proposed to predict the inlet vortex appearance and intensity. The different inlet vortices are described in detail, among them the trailing vortex, composed of trailed and ingested parts; and a new vortex, called the feeding vortex. Additionally the interaction between the different vortices is shown, highlighting the importance the nacelle walls have in the strengthening of these vortices. In this process a new analysis methodology is shown, in which the wall boundary conditions used in the CFD analysis are selectively changed between slipping and non-slipping walls, allowing to discover correlations between the different vorticity sources and the vortices'; intensities.Instituto Tecnológico de AeronáuticaRoberto da Mota GirardiLuis Gustavo Trapp2012-12-14info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesishttp://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2171reponame:Biblioteca Digital de Teses e Dissertações do ITAinstname:Instituto Tecnológico de Aeronáuticainstacron:ITAenginfo:eu-repo/semantics/openAccessapplication/pdf2019-02-02T14:04:41Zoai:agregador.ibict.br.BDTD_ITA:oai:ita.br:2171http://oai.bdtd.ibict.br/requestopendoar:null2020-05-28 19:38:27.742Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáuticatrue
dc.title.none.fl_str_mv Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
title Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
spellingShingle Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
Luis Gustavo Trapp
Vórtices
Dinâmica dos fluidos computacional
Aerodinâmica
Engenharia aeronáutica
title_short Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
title_full Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
title_fullStr Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
title_full_unstemmed Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
title_sort Flow analysis of an engine nacelle in crosswind : inlet vortices and their interactions
author Luis Gustavo Trapp
author_facet Luis Gustavo Trapp
author_role author
dc.contributor.none.fl_str_mv Roberto da Mota Girardi
dc.contributor.author.fl_str_mv Luis Gustavo Trapp
dc.subject.por.fl_str_mv Vórtices
Dinâmica dos fluidos computacional
Aerodinâmica
Engenharia aeronáutica
topic Vórtices
Dinâmica dos fluidos computacional
Aerodinâmica
Engenharia aeronáutica
dc.description.none.fl_txt_mv Aircraft engines and nacelles operating under crosswind present some design challenges. One of the phenomenon that requires a better comprehension is the vortex that forms between the ground and the engine inlet because this vortex can suck debris into the engine and also affect the engine operability. This work establishes procedures and criteria for using CFD for evaluating crosswind conditions that affect aeronautical engines. A new correlation, the streamtube diameter ratio (SDR), is proposed to predict the inlet vortex appearance and intensity. The different inlet vortices are described in detail, among them the trailing vortex, composed of trailed and ingested parts; and a new vortex, called the feeding vortex. Additionally the interaction between the different vortices is shown, highlighting the importance the nacelle walls have in the strengthening of these vortices. In this process a new analysis methodology is shown, in which the wall boundary conditions used in the CFD analysis are selectively changed between slipping and non-slipping walls, allowing to discover correlations between the different vorticity sources and the vortices'; intensities.
description Aircraft engines and nacelles operating under crosswind present some design challenges. One of the phenomenon that requires a better comprehension is the vortex that forms between the ground and the engine inlet because this vortex can suck debris into the engine and also affect the engine operability. This work establishes procedures and criteria for using CFD for evaluating crosswind conditions that affect aeronautical engines. A new correlation, the streamtube diameter ratio (SDR), is proposed to predict the inlet vortex appearance and intensity. The different inlet vortices are described in detail, among them the trailing vortex, composed of trailed and ingested parts; and a new vortex, called the feeding vortex. Additionally the interaction between the different vortices is shown, highlighting the importance the nacelle walls have in the strengthening of these vortices. In this process a new analysis methodology is shown, in which the wall boundary conditions used in the CFD analysis are selectively changed between slipping and non-slipping walls, allowing to discover correlations between the different vorticity sources and the vortices'; intensities.
publishDate 2012
dc.date.none.fl_str_mv 2012-12-14
dc.type.driver.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/doctoralThesis
status_str publishedVersion
format doctoralThesis
dc.identifier.uri.fl_str_mv http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2171
url http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2171
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.publisher.none.fl_str_mv Instituto Tecnológico de Aeronáutica
publisher.none.fl_str_mv Instituto Tecnológico de Aeronáutica
dc.source.none.fl_str_mv reponame:Biblioteca Digital de Teses e Dissertações do ITA
instname:Instituto Tecnológico de Aeronáutica
instacron:ITA
reponame_str Biblioteca Digital de Teses e Dissertações do ITA
collection Biblioteca Digital de Teses e Dissertações do ITA
instname_str Instituto Tecnológico de Aeronáutica
instacron_str ITA
institution ITA
repository.name.fl_str_mv Biblioteca Digital de Teses e Dissertações do ITA - Instituto Tecnológico de Aeronáutica
repository.mail.fl_str_mv
subject_por_txtF_mv Vórtices
Dinâmica dos fluidos computacional
Aerodinâmica
Engenharia aeronáutica
_version_ 1706804998173622272

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