Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers
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/10400.6/12149 |
Resumo: | Dynamic stall is an effect frequently seen in nature and rotary wings where flow separation induces strong force oscillations. In order to simulate such phenomena, reduced-order models (ROMs) such as the LESP-modulated discrete-vortex method (LDVM) are often used whose applicability at low Reynolds number is discussed here. CFD computations with the SST were conducted to obtain the critical leading-edge suction parameter (LESP) by analyzing the skin friction coefficient distribution for the Reynolds number tested of 1,500. Results explore both symmetrical and asymmetrical plunging of a NACA0012 airfoil following a triangular velocity profile, indicating a good agreement between experimental, CFD, and LDVM computations, which makes the latter, a very efficient and adequate method to study wake configurations of oscillating airfoils at low Reynolds numbers. |
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Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds NumbersFlappingMicro Air VehicleAerodynamicsDynamic stall is an effect frequently seen in nature and rotary wings where flow separation induces strong force oscillations. In order to simulate such phenomena, reduced-order models (ROMs) such as the LESP-modulated discrete-vortex method (LDVM) are often used whose applicability at low Reynolds number is discussed here. CFD computations with the SST were conducted to obtain the critical leading-edge suction parameter (LESP) by analyzing the skin friction coefficient distribution for the Reynolds number tested of 1,500. Results explore both symmetrical and asymmetrical plunging of a NACA0012 airfoil following a triangular velocity profile, indicating a good agreement between experimental, CFD, and LDVM computations, which makes the latter, a very efficient and adequate method to study wake configurations of oscillating airfoils at low Reynolds numbers.Grant co-sponsored by Santander-UBI BID/FE/2019. The authors also acknowledge the financial support of the Brazilian agencies: the National Council for Scientific and Technological Development – CNPq (grants #131346/2020-2 and #306824/2019-1) and the São Paulo State Research Agency – FAPESP (grants #2017/02926-9 and #2020/00326-7).American Institute of Aeronautics and Astronautics IncuBibliorumTorres, George L. S.Camacho, EmanuelMarques, Flávio D.Silva, André2021-01-042060-01-04T00:00:00Z2021-01-04T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/12149engGeorge L. S. Torres, Emanuel. A. R. Camacho, Flávio D. Marques, André R. R. Silva Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers AIAA SciTech 2021 Forum and Exposition, Evento Online, TN, EUA, 11-15 janeiro, 2021978-162410609-510.2514/6.2021-0968info: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:RCAAP2023-12-15T09:55:04Zoai:ubibliorum.ubi.pt:10400.6/12149Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:51:49.136062Repositório 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 |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
title |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
spellingShingle |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers Torres, George L. S. Flapping Micro Air Vehicle Aerodynamics |
title_short |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
title_full |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
title_fullStr |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
title_full_unstemmed |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
title_sort |
Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers |
author |
Torres, George L. S. |
author_facet |
Torres, George L. S. Camacho, Emanuel Marques, Flávio D. Silva, André |
author_role |
author |
author2 |
Camacho, Emanuel Marques, Flávio D. Silva, André |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
uBibliorum |
dc.contributor.author.fl_str_mv |
Torres, George L. S. Camacho, Emanuel Marques, Flávio D. Silva, André |
dc.subject.por.fl_str_mv |
Flapping Micro Air Vehicle Aerodynamics |
topic |
Flapping Micro Air Vehicle Aerodynamics |
description |
Dynamic stall is an effect frequently seen in nature and rotary wings where flow separation induces strong force oscillations. In order to simulate such phenomena, reduced-order models (ROMs) such as the LESP-modulated discrete-vortex method (LDVM) are often used whose applicability at low Reynolds number is discussed here. CFD computations with the SST were conducted to obtain the critical leading-edge suction parameter (LESP) by analyzing the skin friction coefficient distribution for the Reynolds number tested of 1,500. Results explore both symmetrical and asymmetrical plunging of a NACA0012 airfoil following a triangular velocity profile, indicating a good agreement between experimental, CFD, and LDVM computations, which makes the latter, a very efficient and adequate method to study wake configurations of oscillating airfoils at low Reynolds numbers. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-04 2021-01-04T00:00:00Z 2060-01-04T00:00:00Z |
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/10400.6/12149 |
url |
http://hdl.handle.net/10400.6/12149 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
George L. S. Torres, Emanuel. A. R. Camacho, Flávio D. Marques, André R. R. Silva Simulations of a Plunging Airfoil Undergoing Unequal Ascending and Descending Velocities at Low Reynolds Numbers AIAA SciTech 2021 Forum and Exposition, Evento Online, TN, EUA, 11-15 janeiro, 2021 978-162410609-5 10.2514/6.2021-0968 |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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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 |
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1799136407111860224 |