Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://paginas.fe.up.pt/~eurodyn2014/CD/program.html http://hdl.handle.net/11449/130366 |
Resumo: | Stall-induced vibrations are a relevant aeroelastic problem for very flexible aero-structures. Helicopter blades, wind turbines, or other rotating components are severely inflicted to vibrate in stall condition during each revolution of its rotor. Despite a significant effort to model the aerodynamics associated to the stall phenomena, non-linear aeroelastic behavior prediction and analysis in such flow regime remain formidable challenges. Another source of nonlinearity with influence to aeroelastic response may be associated to structural dynamics. The combination of both separated flow aerodynamic and structural nonlinearities lead to complex dynamics, for instance, bifurcations and chaos. The purpose of this work is to present the analysis of stall-induced vibrations of an airfoil in pitching when concentrated nonlinearities are associated to its structural dynamics. Limit cycles oscillations at higher angles of attach and complex non-linear features are analyzed for different nonlinear models for concentrated restoring pitching moment. The pitching-only typical section dynamics is coupled with an unsteady aerodynamic model based on Beddoes-Leishmann semi-empirical approach to produce the proper framework for gathering time series of aeroelastic responses. The analyses are performed by checking the content of the aeroelastic responses prior and after limit cycle oscillations occur. Evolutions on limit cycles amplitudes are used to reveal bifurcation points, thereby providing important information to assess, characterize, and qualify the nonlinear behavior associated with combinations of different forms to represent concentrated pitching spring of the typical section. |
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Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoilsAeroelasticityStall-induced vibrationsDynamic stallNonlinear dynamicsNonlinear vibrationsStall-induced vibrations are a relevant aeroelastic problem for very flexible aero-structures. Helicopter blades, wind turbines, or other rotating components are severely inflicted to vibrate in stall condition during each revolution of its rotor. Despite a significant effort to model the aerodynamics associated to the stall phenomena, non-linear aeroelastic behavior prediction and analysis in such flow regime remain formidable challenges. Another source of nonlinearity with influence to aeroelastic response may be associated to structural dynamics. The combination of both separated flow aerodynamic and structural nonlinearities lead to complex dynamics, for instance, bifurcations and chaos. The purpose of this work is to present the analysis of stall-induced vibrations of an airfoil in pitching when concentrated nonlinearities are associated to its structural dynamics. Limit cycles oscillations at higher angles of attach and complex non-linear features are analyzed for different nonlinear models for concentrated restoring pitching moment. The pitching-only typical section dynamics is coupled with an unsteady aerodynamic model based on Beddoes-Leishmann semi-empirical approach to produce the proper framework for gathering time series of aeroelastic responses. The analyses are performed by checking the content of the aeroelastic responses prior and after limit cycle oscillations occur. Evolutions on limit cycles amplitudes are used to reveal bifurcation points, thereby providing important information to assess, characterize, and qualify the nonlinear behavior associated with combinations of different forms to represent concentrated pitching spring of the typical section.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Instituto Nacional de Ciência e Tecnologia de Estruturas Inteligentes em Engenharia (INCT-EIE)Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Engineering School of Sao Carlos, University of S ˜ ao Paulo, S ˜ ao Carlos, SP, BrazilSão Paulo State University (UNESP), São João da Boa Vista, SP, BrazilCNPq: 303314/2010-9FAPESP: 2012/00325-4FAPESP: 2012/08459-1CNPq: 574001/2008-5European Assoc Structural DynamicsUniversidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Pereira, Daniel A.Vasconcellos, Rui M. G. [UNESP]Marques, Flávio D.2015-11-03T18:25:39Z2015-11-03T18:25:39Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject3153-3160http://paginas.fe.up.pt/~eurodyn2014/CD/program.htmlEurodyn 2014: Ix International Conference On Structural Dynamics. Munich: European Assoc Structural Dynamics, p. 3153-3160, 2014.2311-9020http://hdl.handle.net/11449/130366WOS:00035478660402503479922475174420000-0001-7288-5408Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEurodyn 2014: Ix International Conference On Structural Dynamics0,165info:eu-repo/semantics/openAccess2024-08-06T13:24:15Zoai:repositorio.unesp.br:11449/130366Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T13:24:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
title |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
spellingShingle |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils Pereira, Daniel A. Aeroelasticity Stall-induced vibrations Dynamic stall Nonlinear dynamics Nonlinear vibrations |
title_short |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
title_full |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
title_fullStr |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
title_full_unstemmed |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
title_sort |
Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils |
author |
Pereira, Daniel A. |
author_facet |
Pereira, Daniel A. Vasconcellos, Rui M. G. [UNESP] Marques, Flávio D. |
author_role |
author |
author2 |
Vasconcellos, Rui M. G. [UNESP] Marques, Flávio D. |
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 |
Pereira, Daniel A. Vasconcellos, Rui M. G. [UNESP] Marques, Flávio D. |
dc.subject.por.fl_str_mv |
Aeroelasticity Stall-induced vibrations Dynamic stall Nonlinear dynamics Nonlinear vibrations |
topic |
Aeroelasticity Stall-induced vibrations Dynamic stall Nonlinear dynamics Nonlinear vibrations |
description |
Stall-induced vibrations are a relevant aeroelastic problem for very flexible aero-structures. Helicopter blades, wind turbines, or other rotating components are severely inflicted to vibrate in stall condition during each revolution of its rotor. Despite a significant effort to model the aerodynamics associated to the stall phenomena, non-linear aeroelastic behavior prediction and analysis in such flow regime remain formidable challenges. Another source of nonlinearity with influence to aeroelastic response may be associated to structural dynamics. The combination of both separated flow aerodynamic and structural nonlinearities lead to complex dynamics, for instance, bifurcations and chaos. The purpose of this work is to present the analysis of stall-induced vibrations of an airfoil in pitching when concentrated nonlinearities are associated to its structural dynamics. Limit cycles oscillations at higher angles of attach and complex non-linear features are analyzed for different nonlinear models for concentrated restoring pitching moment. The pitching-only typical section dynamics is coupled with an unsteady aerodynamic model based on Beddoes-Leishmann semi-empirical approach to produce the proper framework for gathering time series of aeroelastic responses. The analyses are performed by checking the content of the aeroelastic responses prior and after limit cycle oscillations occur. Evolutions on limit cycles amplitudes are used to reveal bifurcation points, thereby providing important information to assess, characterize, and qualify the nonlinear behavior associated with combinations of different forms to represent concentrated pitching spring of the typical section. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01 2015-11-03T18:25:39Z 2015-11-03T18:25:39Z |
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://paginas.fe.up.pt/~eurodyn2014/CD/program.html Eurodyn 2014: Ix International Conference On Structural Dynamics. Munich: European Assoc Structural Dynamics, p. 3153-3160, 2014. 2311-9020 http://hdl.handle.net/11449/130366 WOS:000354786604025 0347992247517442 0000-0001-7288-5408 |
url |
http://paginas.fe.up.pt/~eurodyn2014/CD/program.html http://hdl.handle.net/11449/130366 |
identifier_str_mv |
Eurodyn 2014: Ix International Conference On Structural Dynamics. Munich: European Assoc Structural Dynamics, p. 3153-3160, 2014. 2311-9020 WOS:000354786604025 0347992247517442 0000-0001-7288-5408 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Eurodyn 2014: Ix International Conference On Structural Dynamics 0,165 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
3153-3160 |
dc.publisher.none.fl_str_mv |
European Assoc Structural Dynamics |
publisher.none.fl_str_mv |
European Assoc Structural Dynamics |
dc.source.none.fl_str_mv |
Web of Science 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 |
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1808128156286058496 |