Contribution to the physical description of supercritical cold flow injection: The case of nitrogen
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.6/11522 |
Resumo: | While increased pressure and temperature contribute to an overall efficiency gain in the mixing of propellants and oxidizers, characteristic of conditions in the combustion chambers of liquid rocket engines, they also propel mixtures to trans- and supercritical conditions. In these conditions, the engine flow exhibits a gas jet-like behavior that may be described using an approach developed for variable density incompressible flows. The present study focuses on an approach using the Reynolds-averaged Navier–Stokes equations to evaluate the jet topology for different injectors’ conditions. Based on the so-called ’thermal breakup mechanism concept’ proposed in the literature, the axial density decay in supercritical nitrogen jets is predicted for a wide range of conditions. The results show the influence of thermal breakup, providing a better insight of the available experimental data. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Contribution to the physical description of supercritical cold flow injection: The case of nitrogenInjector heat transferLiquid rocket engineInjector heat transferWhile increased pressure and temperature contribute to an overall efficiency gain in the mixing of propellants and oxidizers, characteristic of conditions in the combustion chambers of liquid rocket engines, they also propel mixtures to trans- and supercritical conditions. In these conditions, the engine flow exhibits a gas jet-like behavior that may be described using an approach developed for variable density incompressible flows. The present study focuses on an approach using the Reynolds-averaged Navier–Stokes equations to evaluate the jet topology for different injectors’ conditions. Based on the so-called ’thermal breakup mechanism concept’ proposed in the literature, the axial density decay in supercritical nitrogen jets is predicted for a wide range of conditions. The results show the influence of thermal breakup, providing a better insight of the available experimental data.Fundação para a Ciência e a TecnologiaElsevieruBibliorumMagalhães, LeandroSilva, AndréBarata, Jorge M M2024-01-01T01:30:59Z2021-10-152021-10-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/11522eng0094-576510.1016/j.actaastro.2021.09.044info: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:RCAAP2024-01-03T02:30:32Zoai:ubibliorum.ubi.pt:10400.6/11522Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:51:17.690810Repositório 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 |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
title |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
spellingShingle |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen Magalhães, Leandro Injector heat transfer Liquid rocket engine Injector heat transfer |
title_short |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
title_full |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
title_fullStr |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
title_full_unstemmed |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
title_sort |
Contribution to the physical description of supercritical cold flow injection: The case of nitrogen |
author |
Magalhães, Leandro |
author_facet |
Magalhães, Leandro Silva, André Barata, Jorge M M |
author_role |
author |
author2 |
Silva, André Barata, Jorge M M |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
uBibliorum |
dc.contributor.author.fl_str_mv |
Magalhães, Leandro Silva, André Barata, Jorge M M |
dc.subject.por.fl_str_mv |
Injector heat transfer Liquid rocket engine Injector heat transfer |
topic |
Injector heat transfer Liquid rocket engine Injector heat transfer |
description |
While increased pressure and temperature contribute to an overall efficiency gain in the mixing of propellants and oxidizers, characteristic of conditions in the combustion chambers of liquid rocket engines, they also propel mixtures to trans- and supercritical conditions. In these conditions, the engine flow exhibits a gas jet-like behavior that may be described using an approach developed for variable density incompressible flows. The present study focuses on an approach using the Reynolds-averaged Navier–Stokes equations to evaluate the jet topology for different injectors’ conditions. Based on the so-called ’thermal breakup mechanism concept’ proposed in the literature, the axial density decay in supercritical nitrogen jets is predicted for a wide range of conditions. The results show the influence of thermal breakup, providing a better insight of the available experimental data. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-10-15 2021-10-15T00:00:00Z 2024-01-01T01:30:59Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.6/11522 |
url |
http://hdl.handle.net/10400.6/11522 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0094-5765 10.1016/j.actaastro.2021.09.044 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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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1799136402107006976 |