Unsteady Computations of a Ground Vortex

Detalhes bibliográficos
Autor(a) principal: Nunes, Ricardo F.
Data de Publicação: 2012
Outros Autores: Silva, André, Barata, Jorge M M
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.6/12189
Resumo: A computational study of the impact zone of a wall jet with a boundary layer was performed for a wide range of velocity ratios, VR, from 0.065 to 0.2. A ground vortex is formed and for intermediate velocity ratios the flowfield exhibits an oscillating behavior. The location and size of the ground vortex is almost constant during the complete sequence of oscillation, but secondary vortexes may also appear. For the case of very low velocity crossflow (small VR) the computations exhibit a stationary solution, which is in agreement with previous numerical and experimental results. For strong crossflows (large VR) the flow is also stationary, although there is a transition regime of some unsteadiness without any secondary vortex present.
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spelling Unsteady Computations of a Ground VortexWake VorticesBoussinesq ApproximationTurbulent FlowAerodynamic ForceNumerical SimulationKinetic EnergyBoundary Layer ThicknessHot Gas IngestionPoisson's EquationConvectionA computational study of the impact zone of a wall jet with a boundary layer was performed for a wide range of velocity ratios, VR, from 0.065 to 0.2. A ground vortex is formed and for intermediate velocity ratios the flowfield exhibits an oscillating behavior. The location and size of the ground vortex is almost constant during the complete sequence of oscillation, but secondary vortexes may also appear. For the case of very low velocity crossflow (small VR) the computations exhibit a stationary solution, which is in agreement with previous numerical and experimental results. For strong crossflows (large VR) the flow is also stationary, although there is a transition regime of some unsteadiness without any secondary vortex present.Fundação para a Ciência e a TecnologiaAmerican Institute of Aeronautics and Astronautics IncuBibliorumNunes, Ricardo F.Silva, AndréBarata, Jorge M M2012-06-252060-06-25T00:00:00Z2012-06-25T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/12189engNunes, R.F., Silva, A.R.R., Barata, J.M.M. Unsteady Computations of a Ground Vortex 48th Aerospace Sciences Meeting, Orlando, Flórida, EUA, 4-7 janeiro, 2010 DOI: 10.2514/6.2010-327978-160086739-210.2514/6.2010-327info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-15T09:55:12Zoai:ubibliorum.ubi.pt:10400.6/12189Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:51:51.146049Repositório 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 Unsteady Computations of a Ground Vortex
title Unsteady Computations of a Ground Vortex
spellingShingle Unsteady Computations of a Ground Vortex
Nunes, Ricardo F.
Wake Vortices
Boussinesq Approximation
Turbulent Flow
Aerodynamic Force
Numerical Simulation
Kinetic Energy
Boundary Layer Thickness
Hot Gas Ingestion
Poisson's Equation
Convection
title_short Unsteady Computations of a Ground Vortex
title_full Unsteady Computations of a Ground Vortex
title_fullStr Unsteady Computations of a Ground Vortex
title_full_unstemmed Unsteady Computations of a Ground Vortex
title_sort Unsteady Computations of a Ground Vortex
author Nunes, Ricardo F.
author_facet Nunes, Ricardo F.
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 Nunes, Ricardo F.
Silva, André
Barata, Jorge M M
dc.subject.por.fl_str_mv Wake Vortices
Boussinesq Approximation
Turbulent Flow
Aerodynamic Force
Numerical Simulation
Kinetic Energy
Boundary Layer Thickness
Hot Gas Ingestion
Poisson's Equation
Convection
topic Wake Vortices
Boussinesq Approximation
Turbulent Flow
Aerodynamic Force
Numerical Simulation
Kinetic Energy
Boundary Layer Thickness
Hot Gas Ingestion
Poisson's Equation
Convection
description A computational study of the impact zone of a wall jet with a boundary layer was performed for a wide range of velocity ratios, VR, from 0.065 to 0.2. A ground vortex is formed and for intermediate velocity ratios the flowfield exhibits an oscillating behavior. The location and size of the ground vortex is almost constant during the complete sequence of oscillation, but secondary vortexes may also appear. For the case of very low velocity crossflow (small VR) the computations exhibit a stationary solution, which is in agreement with previous numerical and experimental results. For strong crossflows (large VR) the flow is also stationary, although there is a transition regime of some unsteadiness without any secondary vortex present.
publishDate 2012
dc.date.none.fl_str_mv 2012-06-25
2012-06-25T00:00:00Z
2060-06-25T00:00:00Z
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/10400.6/12189
url http://hdl.handle.net/10400.6/12189
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Nunes, R.F., Silva, A.R.R., Barata, J.M.M. Unsteady Computations of a Ground Vortex 48th Aerospace Sciences Meeting, Orlando, Flórida, EUA, 4-7 janeiro, 2010 DOI: 10.2514/6.2010-327
978-160086739-2
10.2514/6.2010-327
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Institute of Aeronautics and Astronautics Inc
publisher.none.fl_str_mv American Institute of Aeronautics and Astronautics Inc
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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