Influence of structural nonlinearities in stall-induced aeroelastic response of pitching airfoils

Detalhes bibliográficos
Autor(a) principal: Pereira, Daniel A.
Data de Publicação: 2014
Outros Autores: Vasconcellos, Rui M. G. [UNESP], Marques, Flávio D.
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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spelling 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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