Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions

To accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this strategy causes deleterious flow phenomena such as von Kármán’s vortices at t...

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Autores: Roig Bauzà, Rafel, Chen, Jian, Torre Rodríguez, Óscar de la, Escaler Puigoriol, Francesc Xavier|||0000-0002-9374-7749
Formato: artículo
Fecha de publicación:2021
País:España
Recursos:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/353081
Acesso em linha:https://hdl.handle.net/2117/353081
https://dx.doi.org/10.3390/en14196033
Access Level:acceso abierto
Palavra-chave:Cavitation
Von Kármán vortex street
Lock-in
Modal work approach
Vibration
Cavitació
Vòrtexs (Hidrodinàmica)
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
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spelling Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditionsRoig Bauzà, RafelChen, JianTorre Rodríguez, Óscar de laEscaler Puigoriol, Francesc Xavier|||0000-0002-9374-7749CavitationVon Kármán vortex streetCavitationLock-inModal work approachVibrationCavitacióVòrtexs (Hidrodinàmica)Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsTo accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this strategy causes deleterious flow phenomena such as von Kármán’s vortices at the wake of the vanes and/or blades. When their shedding frequency lies in the vicinity of a structure’s natural frequency, lock-in occurs and vibration amplitudes increase significantly. Moreover, if cavitation occurs at the centers of these vortices, the structure’s dynamic response will be modified. In order to understand this interaction and to avoid its negative consequences, the vibration behavior of a NACA 0009 hydrofoil under a torsional lock-in condition was numerically simulated for cavitation-free and cavitating-flow conditions. The results showed that the presence of vortex cavitation modified the formation and growth process of shed von Kármán vortices in the near-wake region which, in turn, caused an increase of the work performed by the hydrofoil deformation on the surrounding flow and a sharp decrease of the maximum vibration amplitude under resonance conditions.This research was funded by Horizon 2020 research and innovation program under grant agreement No 814958.Peer Reviewed20212021-09-2220212021-10-06journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/353081https://dx.doi.org/10.3390/en14196033reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 814958 Active Flow Control system FOR improving HYDRaulic turbine performances at off-design Operationopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttps://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3530812026-05-27T15:37:01Z
dc.title.none.fl_str_mv Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
title Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
spellingShingle Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
Roig Bauzà, Rafel
Cavitation
Von Kármán vortex street
Cavitation
Lock-in
Modal work approach
Vibration
Cavitació
Vòrtexs (Hidrodinàmica)
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
title_short Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
title_full Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
title_fullStr Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
title_full_unstemmed Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
title_sort Understanding the influence of wake cavitation on the dynamic response of hydraulic profiles under lock-in conditions
dc.creator.none.fl_str_mv Roig Bauzà, Rafel
Chen, Jian
Torre Rodríguez, Óscar de la
Escaler Puigoriol, Francesc Xavier|||0000-0002-9374-7749
author Roig Bauzà, Rafel
author_facet Roig Bauzà, Rafel
Chen, Jian
Torre Rodríguez, Óscar de la
Escaler Puigoriol, Francesc Xavier|||0000-0002-9374-7749
author_role author
author2 Chen, Jian
Torre Rodríguez, Óscar de la
Escaler Puigoriol, Francesc Xavier|||0000-0002-9374-7749
author2_role author
author
author
dc.subject.none.fl_str_mv Cavitation
Von Kármán vortex street
Cavitation
Lock-in
Modal work approach
Vibration
Cavitació
Vòrtexs (Hidrodinàmica)
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
topic Cavitation
Von Kármán vortex street
Cavitation
Lock-in
Modal work approach
Vibration
Cavitació
Vòrtexs (Hidrodinàmica)
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
description To accelerate the integration of fluctuating renewable energy technologies in the power systems, it is necessary to increase the flexibility of hydropower by operating turbines at off-design conditions. Unfortunately, this strategy causes deleterious flow phenomena such as von Kármán’s vortices at the wake of the vanes and/or blades. When their shedding frequency lies in the vicinity of a structure’s natural frequency, lock-in occurs and vibration amplitudes increase significantly. Moreover, if cavitation occurs at the centers of these vortices, the structure’s dynamic response will be modified. In order to understand this interaction and to avoid its negative consequences, the vibration behavior of a NACA 0009 hydrofoil under a torsional lock-in condition was numerically simulated for cavitation-free and cavitating-flow conditions. The results showed that the presence of vortex cavitation modified the formation and growth process of shed von Kármán vortices in the near-wake region which, in turn, caused an increase of the work performed by the hydrofoil deformation on the surrounding flow and a sharp decrease of the maximum vibration amplitude under resonance conditions.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-09-22
2021
2021-10-06
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/353081
https://dx.doi.org/10.3390/en14196033
url https://hdl.handle.net/2117/353081
https://dx.doi.org/10.3390/en14196033
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://doi.org/10.13039/100010661 Horizon 2020 Framework Programme 814958 Active Flow Control system FOR improving HYDRaulic turbine performances at off-design Operation
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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