Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation

Autores
Rivetti, Arturo; Angulo, Mauricio Abel; Lucino, Cecilia Verónica; Liscia, Sergio Oscar
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Tip leakage vortex cavitation in axial hydro-turbines may cause erosion, noise and vibration. Damage due to cavitation can be found at the tip of the runner blades on the low pressure side and the discharge ring. In some cases, the erosion follows an oscillatory pattern that is related to the number of guide vanes. That might suggest that a relationship exists between the flow through the guide vanes and the tip vortex cavitating core that induces this kind of erosion. On the other hand, it is known that air injection has a beneficial effect on reducing the damage by cavitation. In this paper, a methodology to identify the interaction between guide vanes and tip vortex cavitation is presented and the effect of air injection in reducing this particular kind of erosion was studied over a range of operating conditions on a Kaplan scale model. It was found that air injection, at the expense of slightly reducing the efficiency of the turbine, mitigates the erosive potential of tip leakage cavitation, attenuates the interaction between the flow through the guide vanes and the tip vortex and decreases the level of vibration of the structural components.
Facultad de Ingeniería
Materia
Ingeniería Hidráulica
Cavitation
Erosion
Hydraulic turbines
Leakage
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/3.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/86167

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network_name_str SEDICI (UNLP)
spelling Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitationRivetti, ArturoAngulo, Mauricio AbelLucino, Cecilia VerónicaLiscia, Sergio OscarIngeniería HidráulicaCavitationErosionHydraulic turbinesLeakageTip leakage vortex cavitation in axial hydro-turbines may cause erosion, noise and vibration. Damage due to cavitation can be found at the tip of the runner blades on the low pressure side and the discharge ring. In some cases, the erosion follows an oscillatory pattern that is related to the number of guide vanes. That might suggest that a relationship exists between the flow through the guide vanes and the tip vortex cavitating core that induces this kind of erosion. On the other hand, it is known that air injection has a beneficial effect on reducing the damage by cavitation. In this paper, a methodology to identify the interaction between guide vanes and tip vortex cavitation is presented and the effect of air injection in reducing this particular kind of erosion was studied over a range of operating conditions on a Kaplan scale model. It was found that air injection, at the expense of slightly reducing the efficiency of the turbine, mitigates the erosive potential of tip leakage cavitation, attenuates the interaction between the flow through the guide vanes and the tip vortex and decreases the level of vibration of the structural components.Facultad de Ingeniería2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/86167enginfo:eu-repo/semantics/altIdentifier/issn/1742-6588info:eu-repo/semantics/altIdentifier/doi/10.1088/1742-6596/656/1/012069info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 Unported (CC BY 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:49:08Zoai:sedici.unlp.edu.ar:10915/86167Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:49:08.892SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
title Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
spellingShingle Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
Rivetti, Arturo
Ingeniería Hidráulica
Cavitation
Erosion
Hydraulic turbines
Leakage
title_short Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
title_full Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
title_fullStr Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
title_full_unstemmed Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
title_sort Pressurized air injection in an axial hydro-turbine model for the mitigation of tip leakage cavitation
dc.creator.none.fl_str_mv Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Liscia, Sergio Oscar
author Rivetti, Arturo
author_facet Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Liscia, Sergio Oscar
author_role author
author2 Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Liscia, Sergio Oscar
author2_role author
author
author
dc.subject.none.fl_str_mv Ingeniería Hidráulica
Cavitation
Erosion
Hydraulic turbines
Leakage
topic Ingeniería Hidráulica
Cavitation
Erosion
Hydraulic turbines
Leakage
dc.description.none.fl_txt_mv Tip leakage vortex cavitation in axial hydro-turbines may cause erosion, noise and vibration. Damage due to cavitation can be found at the tip of the runner blades on the low pressure side and the discharge ring. In some cases, the erosion follows an oscillatory pattern that is related to the number of guide vanes. That might suggest that a relationship exists between the flow through the guide vanes and the tip vortex cavitating core that induces this kind of erosion. On the other hand, it is known that air injection has a beneficial effect on reducing the damage by cavitation. In this paper, a methodology to identify the interaction between guide vanes and tip vortex cavitation is presented and the effect of air injection in reducing this particular kind of erosion was studied over a range of operating conditions on a Kaplan scale model. It was found that air injection, at the expense of slightly reducing the efficiency of the turbine, mitigates the erosive potential of tip leakage cavitation, attenuates the interaction between the flow through the guide vanes and the tip vortex and decreases the level of vibration of the structural components.
Facultad de Ingeniería
description Tip leakage vortex cavitation in axial hydro-turbines may cause erosion, noise and vibration. Damage due to cavitation can be found at the tip of the runner blades on the low pressure side and the discharge ring. In some cases, the erosion follows an oscillatory pattern that is related to the number of guide vanes. That might suggest that a relationship exists between the flow through the guide vanes and the tip vortex cavitating core that induces this kind of erosion. On the other hand, it is known that air injection has a beneficial effect on reducing the damage by cavitation. In this paper, a methodology to identify the interaction between guide vanes and tip vortex cavitation is presented and the effect of air injection in reducing this particular kind of erosion was studied over a range of operating conditions on a Kaplan scale model. It was found that air injection, at the expense of slightly reducing the efficiency of the turbine, mitigates the erosive potential of tip leakage cavitation, attenuates the interaction between the flow through the guide vanes and the tip vortex and decreases the level of vibration of the structural components.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/86167
url http://sedici.unlp.edu.ar/handle/10915/86167
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1742-6588
info:eu-repo/semantics/altIdentifier/doi/10.1088/1742-6596/656/1/012069
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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