Wavepackets in Boundary Layers Close to Transonic Speeds
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.piutam.2015.03.063 http://hdl.handle.net/11449/167983 |
Resumo: | In practical situations, natural transition determines the transition to turbulence process. Experimental evidence suggest that the wave packet evolution is related closely to natural transition. The major part of numerical works on wave packets are focused on incompressible, supersonic and hypersonoc flows, subsonic ones are probably the less researched. A compressible DNS code was developed, several code validation tests were performed, including a simulation of an experiment of wave packets 1. The evolution of wave packets on compressible boundary layer in a flat plate is studied by Direct Numerical Simulations (DNS), to investigate the effect of Mach number in the initial nonlinear stages. For Mach 0.9 were considered three cases: linear, nonlinear and interaction between two packets. Results suggest that subharmonic mechanism is the most probable scenario at the initial nonlinear stages. |
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Wavepackets in Boundary Layers Close to Transonic SpeedsCompressible boundary layerDNS simulationnatural transitionsubsonic boundary layerwave packetIn practical situations, natural transition determines the transition to turbulence process. Experimental evidence suggest that the wave packet evolution is related closely to natural transition. The major part of numerical works on wave packets are focused on incompressible, supersonic and hypersonoc flows, subsonic ones are probably the less researched. A compressible DNS code was developed, several code validation tests were performed, including a simulation of an experiment of wave packets 1. The evolution of wave packets on compressible boundary layer in a flat plate is studied by Direct Numerical Simulations (DNS), to investigate the effect of Mach number in the initial nonlinear stages. For Mach 0.9 were considered three cases: linear, nonlinear and interaction between two packets. Results suggest that subharmonic mechanism is the most probable scenario at the initial nonlinear stages.Universidade de São Paulo, Departamento de Engenharia Aeronautica, Av. João Dagnone, 1100Universidade Estadual Paulista (UNESP), Câmpus de Sãao João da Boa Vista - SPUniversidade Estadual Paulista (UNESP), Câmpus de Sãao João da Boa Vista - SPUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Martínez, Andrés G.Gennaro, Elmer M. [UNESP]Medeiros, Marcello A.F.2018-12-11T16:39:07Z2018-12-11T16:39:07Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject374-380http://dx.doi.org/10.1016/j.piutam.2015.03.063Procedia IUTAM, v. 14, p. 374-380.2210-9838http://hdl.handle.net/11449/16798310.1016/j.piutam.2015.03.0632-s2.0-84940656168Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProcedia IUTAM0,254info:eu-repo/semantics/openAccess2021-10-23T21:44:31Zoai:repositorio.unesp.br:11449/167983Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:16:02.326703Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Wavepackets in Boundary Layers Close to Transonic Speeds |
title |
Wavepackets in Boundary Layers Close to Transonic Speeds |
spellingShingle |
Wavepackets in Boundary Layers Close to Transonic Speeds Martínez, Andrés G. Compressible boundary layer DNS simulation natural transition subsonic boundary layer wave packet |
title_short |
Wavepackets in Boundary Layers Close to Transonic Speeds |
title_full |
Wavepackets in Boundary Layers Close to Transonic Speeds |
title_fullStr |
Wavepackets in Boundary Layers Close to Transonic Speeds |
title_full_unstemmed |
Wavepackets in Boundary Layers Close to Transonic Speeds |
title_sort |
Wavepackets in Boundary Layers Close to Transonic Speeds |
author |
Martínez, Andrés G. |
author_facet |
Martínez, Andrés G. Gennaro, Elmer M. [UNESP] Medeiros, Marcello A.F. |
author_role |
author |
author2 |
Gennaro, Elmer M. [UNESP] Medeiros, Marcello A.F. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Martínez, Andrés G. Gennaro, Elmer M. [UNESP] Medeiros, Marcello A.F. |
dc.subject.por.fl_str_mv |
Compressible boundary layer DNS simulation natural transition subsonic boundary layer wave packet |
topic |
Compressible boundary layer DNS simulation natural transition subsonic boundary layer wave packet |
description |
In practical situations, natural transition determines the transition to turbulence process. Experimental evidence suggest that the wave packet evolution is related closely to natural transition. The major part of numerical works on wave packets are focused on incompressible, supersonic and hypersonoc flows, subsonic ones are probably the less researched. A compressible DNS code was developed, several code validation tests were performed, including a simulation of an experiment of wave packets 1. The evolution of wave packets on compressible boundary layer in a flat plate is studied by Direct Numerical Simulations (DNS), to investigate the effect of Mach number in the initial nonlinear stages. For Mach 0.9 were considered three cases: linear, nonlinear and interaction between two packets. Results suggest that subharmonic mechanism is the most probable scenario at the initial nonlinear stages. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2018-12-11T16:39:07Z 2018-12-11T16:39:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.piutam.2015.03.063 Procedia IUTAM, v. 14, p. 374-380. 2210-9838 http://hdl.handle.net/11449/167983 10.1016/j.piutam.2015.03.063 2-s2.0-84940656168 |
url |
http://dx.doi.org/10.1016/j.piutam.2015.03.063 http://hdl.handle.net/11449/167983 |
identifier_str_mv |
Procedia IUTAM, v. 14, p. 374-380. 2210-9838 10.1016/j.piutam.2015.03.063 2-s2.0-84940656168 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Procedia IUTAM 0,254 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
374-380 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128781045465088 |