Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor

In this article, the suitability of the Reynolds-averaged Navier-Stokes (RANS) to predict the dynamic response in the startup process of small-scale Darrieus vertical-axis wind turbines (VAWT) was investigated. Using OpenFOAM, numerical simulations have been run to evaluate the regions of the rotor...

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Autores: Ramirez, Jose Miguel, Saravia, César Martín
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/149672
Acceso en línea:http://hdl.handle.net/11336/149672
Access Level:acceso abierto
Palabra clave:OpenFoam
Wind turbines
vertical axis
RANS method
https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
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repository_id_str
spelling Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotorRamirez, Jose MiguelSaravia, César MartínOpenFoamWind turbinesvertical axisRANS methodhttps://purl.org/becyt/ford/2.3https://purl.org/becyt/ford/2In this article, the suitability of the Reynolds-averaged Navier-Stokes (RANS) to predict the dynamic response in the startup process of small-scale Darrieus vertical-axis wind turbines (VAWT) was investigated. Using OpenFOAM, numerical simulations have been run to evaluate the regions of the rotor revolution where the prediction of the aerodynamic coefficients is expected to give unreliable results. The qualitative aspects of the prediction of the self-starting of the VAWT for tip speed ratio (λ) ranging from 0 to 3 have been evaluated and to model a more realistic condition, resistive forces acting on the rotor have been implemented. These resistive forces, which are the mechanical friction and the magnetic forces of the generator, were implemented numerically through a viscous damping model and, therefore, a new OpenFOAM library was developed adopting the object-oriented programming methodology as well as the C++ language. From the results, it has been observed that for a λ equal to 0.4 (starting speed), the aerodynamic forces are overestimated for a portion of 82% of the full revolution of the rotor. For a λ equal to 2.70 (steady state), this portion is reduced to 52%. This means that the aerodynamic forces and also the power output are overestimated by a large percentage in a full revolution of the rotor. Therefore, such results allow us to conjecture that RANS modeling may not seem to be an adequate approach to accurately assess the aerodynamic response of VAWTs.Fil: Ramirez, Jose Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Tecnológica Nacional. Facultad Regional Bahía Blanca. Grupo de Investigación en Multifísica Aplicada. - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Grupo de Investigación en Multifísica Aplicada; ArgentinaFil: Saravia, César Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca; Argentina. Universidad Tecnológica Nacional. Facultad Regional Bahía Blanca. Grupo de Investigación en Multifísica Aplicada. - Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Grupo de Investigación en Multifísica Aplicada; ArgentinaAmerican Institute of Physics2021-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/149672Ramirez, Jose Miguel; Saravia, César Martín; Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor; American Institute of Physics; Physics of Fluids; 33; 3; 3-2021; 1-391070-6631CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/5.0045083info:eu-repo/semantics/altIdentifier/doi/10.1063/5.0045083info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:02:29Zoai:ri.conicet.gov.ar:11336/149672instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:02:29.315CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
title Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
spellingShingle Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
Ramirez, Jose Miguel
OpenFoam
Wind turbines
vertical axis
RANS method
https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
title_short Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
title_full Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
title_fullStr Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
title_full_unstemmed Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
title_sort Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor
dc.creator.none.fl_str_mv Ramirez, Jose Miguel
Saravia, César Martín
author Ramirez, Jose Miguel
author_facet Ramirez, Jose Miguel
Saravia, César Martín
author_role author
author2 Saravia, César Martín
author2_role author
dc.subject.none.fl_str_mv OpenFoam
Wind turbines
vertical axis
RANS method
https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
topic OpenFoam
Wind turbines
vertical axis
RANS method
https://purl.org/becyt/ford/2.3
https://purl.org/becyt/ford/2
description In this article, the suitability of the Reynolds-averaged Navier-Stokes (RANS) to predict the dynamic response in the startup process of small-scale Darrieus vertical-axis wind turbines (VAWT) was investigated. Using OpenFOAM, numerical simulations have been run to evaluate the regions of the rotor revolution where the prediction of the aerodynamic coefficients is expected to give unreliable results. The qualitative aspects of the prediction of the self-starting of the VAWT for tip speed ratio (λ) ranging from 0 to 3 have been evaluated and to model a more realistic condition, resistive forces acting on the rotor have been implemented. These resistive forces, which are the mechanical friction and the magnetic forces of the generator, were implemented numerically through a viscous damping model and, therefore, a new OpenFOAM library was developed adopting the object-oriented programming methodology as well as the C++ language. From the results, it has been observed that for a λ equal to 0.4 (starting speed), the aerodynamic forces are overestimated for a portion of 82% of the full revolution of the rotor. For a λ equal to 2.70 (steady state), this portion is reduced to 52%. This means that the aerodynamic forces and also the power output are overestimated by a large percentage in a full revolution of the rotor. Therefore, such results allow us to conjecture that RANS modeling may not seem to be an adequate approach to accurately assess the aerodynamic response of VAWTs.
publishDate 2021
dc.date.none.fl_str_mv 2021-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/149672
Ramirez, Jose Miguel; Saravia, César Martín; Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor; American Institute of Physics; Physics of Fluids; 33; 3; 3-2021; 1-39
1070-6631
CONICET Digital
CONICET
url http://hdl.handle.net/11336/149672
identifier_str_mv Ramirez, Jose Miguel; Saravia, César Martín; Assessment of Reynolds-averaged Navier-Stokes method for modeling the startup regime of a Darrieus rotor; American Institute of Physics; Physics of Fluids; 33; 3; 3-2021; 1-39
1070-6631
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://aip.scitation.org/doi/10.1063/5.0045083
info:eu-repo/semantics/altIdentifier/doi/10.1063/5.0045083
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15.812429

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