Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of Aerospace Technology and Management (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462018000100318 |
Resumo: | ABSTRACT: In order to simulate compressible shear flow stability and aeroacoustic problems, a numerical code must be able to capture how a baseflow behaves when submitted to small disturbances. If the disturbances are amplified, the flow is unstable. The linear stability theory (LST) provides a framework to obtain information about the growth rate in relation to the excitation frequency for a given baseflow. A linear direct numerical simulation (DNS) should capture the same growth rate as the LST, providing a severe test for the code. In the present study, DNS simulations of a two-dimensional compressible mixing layer and of a two-dimensional compressible plane jet are performed. Disturbances are introduced at the domain inflow and spatial growth rates obtained with a DNS code are compared with growth rates obtained from LST analyses, for each baseflow, in order to verify and validate the DNS code. The good comparison between DNS simulations and LST results indicates that the code is able to simulate compressible flow problems and it is possible to use it to perform numerical simulation of instability and aeroacoustic problems. |
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Journal of Aerospace Technology and Management (Online) |
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Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability TheoryCompressible flowDirect numerical simulationLinear stability theoryCode verification and validationABSTRACT: In order to simulate compressible shear flow stability and aeroacoustic problems, a numerical code must be able to capture how a baseflow behaves when submitted to small disturbances. If the disturbances are amplified, the flow is unstable. The linear stability theory (LST) provides a framework to obtain information about the growth rate in relation to the excitation frequency for a given baseflow. A linear direct numerical simulation (DNS) should capture the same growth rate as the LST, providing a severe test for the code. In the present study, DNS simulations of a two-dimensional compressible mixing layer and of a two-dimensional compressible plane jet are performed. Disturbances are introduced at the domain inflow and spatial growth rates obtained with a DNS code are compared with growth rates obtained from LST analyses, for each baseflow, in order to verify and validate the DNS code. The good comparison between DNS simulations and LST results indicates that the code is able to simulate compressible flow problems and it is possible to use it to perform numerical simulation of instability and aeroacoustic problems.Departamento de Ciência e Tecnologia Aeroespacial2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462018000100318Journal of Aerospace Technology and Management v.10 2018reponame:Journal of Aerospace Technology and Management (Online)instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA)instacron:DCTA10.5028/jatm.v10.858info:eu-repo/semantics/openAccessLacerda,Jônatas FerreiraSouza,Leandro Franco deRogenski,Josuel KruppaMendonça,Márcio Teixeira deeng2018-05-23T00:00:00Zoai:scielo:S2175-91462018000100318Revistahttp://www.jatm.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||secretary@jatm.com.br2175-91461984-9648opendoar:2018-05-23T00:00Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA)false |
dc.title.none.fl_str_mv |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
title |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
spellingShingle |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory Lacerda,Jônatas Ferreira Compressible flow Direct numerical simulation Linear stability theory Code verification and validation |
title_short |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
title_full |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
title_fullStr |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
title_full_unstemmed |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
title_sort |
Direct Numerical Simulation Code Validation for Compressible Shear Flows Using Linear Stability Theory |
author |
Lacerda,Jônatas Ferreira |
author_facet |
Lacerda,Jônatas Ferreira Souza,Leandro Franco de Rogenski,Josuel Kruppa Mendonça,Márcio Teixeira de |
author_role |
author |
author2 |
Souza,Leandro Franco de Rogenski,Josuel Kruppa Mendonça,Márcio Teixeira de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Lacerda,Jônatas Ferreira Souza,Leandro Franco de Rogenski,Josuel Kruppa Mendonça,Márcio Teixeira de |
dc.subject.por.fl_str_mv |
Compressible flow Direct numerical simulation Linear stability theory Code verification and validation |
topic |
Compressible flow Direct numerical simulation Linear stability theory Code verification and validation |
description |
ABSTRACT: In order to simulate compressible shear flow stability and aeroacoustic problems, a numerical code must be able to capture how a baseflow behaves when submitted to small disturbances. If the disturbances are amplified, the flow is unstable. The linear stability theory (LST) provides a framework to obtain information about the growth rate in relation to the excitation frequency for a given baseflow. A linear direct numerical simulation (DNS) should capture the same growth rate as the LST, providing a severe test for the code. In the present study, DNS simulations of a two-dimensional compressible mixing layer and of a two-dimensional compressible plane jet are performed. Disturbances are introduced at the domain inflow and spatial growth rates obtained with a DNS code are compared with growth rates obtained from LST analyses, for each baseflow, in order to verify and validate the DNS code. The good comparison between DNS simulations and LST results indicates that the code is able to simulate compressible flow problems and it is possible to use it to perform numerical simulation of instability and aeroacoustic problems. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462018000100318 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462018000100318 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5028/jatm.v10.858 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Departamento de Ciência e Tecnologia Aeroespacial |
publisher.none.fl_str_mv |
Departamento de Ciência e Tecnologia Aeroespacial |
dc.source.none.fl_str_mv |
Journal of Aerospace Technology and Management v.10 2018 reponame:Journal of Aerospace Technology and Management (Online) instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA) instacron:DCTA |
instname_str |
Departamento de Ciência e Tecnologia Aeroespacial (DCTA) |
instacron_str |
DCTA |
institution |
DCTA |
reponame_str |
Journal of Aerospace Technology and Management (Online) |
collection |
Journal of Aerospace Technology and Management (Online) |
repository.name.fl_str_mv |
Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA) |
repository.mail.fl_str_mv |
||secretary@jatm.com.br |
_version_ |
1754732531724320768 |