Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation

Autores
Rivetti, Arturo; Angulo, Mauricio Abel; Lucino, Cecilia Verónica; Hene, M.; Capezio, O.; Liscia, Sergio Oscar
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Blade tip cavitation is a well-known phenomenon that affects the performance of large-diameter Kaplan turbines and induces structural vibration. Injection of pressurized air has been found to yield promising results in reducing those damaging effects. In this work, the results of an experimental test of air injection on a 9.5-m-diameter Kaplan turbine are reported. Experiments were performed for several load conditions and for two different net heads. Accelerations, pressure pulsation and noise emission were monitored for every tested condition. Results show that, at the expense of a maximum efficiency drop of 0.2%, air injection induces a decrease on the level of vibration from 57% up to 84%, depending on the load condition. Such decrease is seen to be proportional to the air flow rate, in the range from 0.06 to 0.8‰ (respect to the discharge at the best efficiency point).
Facultad de Ingeniería
Materia
Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/85965
Acceder
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network_name_str SEDICI (UNLP)
spelling Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitationRivetti, ArturoAngulo, Mauricio AbelLucino, Cecilia VerónicaHene, M.Capezio, O.Liscia, Sergio OscarIngeniería HidráulicaHidromecánicaCavitationHydrofoilsAttached cavityBlade tip cavitation is a well-known phenomenon that affects the performance of large-diameter Kaplan turbines and induces structural vibration. Injection of pressurized air has been found to yield promising results in reducing those damaging effects. In this work, the results of an experimental test of air injection on a 9.5-m-diameter Kaplan turbine are reported. Experiments were performed for several load conditions and for two different net heads. Accelerations, pressure pulsation and noise emission were monitored for every tested condition. Results show that, at the expense of a maximum efficiency drop of 0.2%, air injection induces a decrease on the level of vibration from 57% up to 84%, depending on the load condition. Such decrease is seen to be proportional to the air flow rate, in the range from 0.06 to 0.8‰ (respect to the discharge at the best efficiency point).Facultad de Ingeniería2016info: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/10915/85965enginfo:eu-repo/semantics/altIdentifier/issn/1755-1307info:eu-repo/semantics/altIdentifier/doi/10.1088/1755-1315/49/2/022007info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:49:02Zoai:sedici.unlp.edu.ar:10915/85965Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:49:02.929SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
title Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
spellingShingle Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
Rivetti, Arturo
Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
title_short Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
title_full Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
title_fullStr Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
title_full_unstemmed Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
title_sort Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
dc.creator.none.fl_str_mv Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
author Rivetti, Arturo
author_facet Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
author_role author
author2 Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
topic Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
dc.description.none.fl_txt_mv Blade tip cavitation is a well-known phenomenon that affects the performance of large-diameter Kaplan turbines and induces structural vibration. Injection of pressurized air has been found to yield promising results in reducing those damaging effects. In this work, the results of an experimental test of air injection on a 9.5-m-diameter Kaplan turbine are reported. Experiments were performed for several load conditions and for two different net heads. Accelerations, pressure pulsation and noise emission were monitored for every tested condition. Results show that, at the expense of a maximum efficiency drop of 0.2%, air injection induces a decrease on the level of vibration from 57% up to 84%, depending on the load condition. Such decrease is seen to be proportional to the air flow rate, in the range from 0.06 to 0.8‰ (respect to the discharge at the best efficiency point).
Facultad de Ingeniería
description Blade tip cavitation is a well-known phenomenon that affects the performance of large-diameter Kaplan turbines and induces structural vibration. Injection of pressurized air has been found to yield promising results in reducing those damaging effects. In this work, the results of an experimental test of air injection on a 9.5-m-diameter Kaplan turbine are reported. Experiments were performed for several load conditions and for two different net heads. Accelerations, pressure pulsation and noise emission were monitored for every tested condition. Results show that, at the expense of a maximum efficiency drop of 0.2%, air injection induces a decrease on the level of vibration from 57% up to 84%, depending on the load condition. Such decrease is seen to be proportional to the air flow rate, in the range from 0.06 to 0.8‰ (respect to the discharge at the best efficiency point).
publishDate 2016
dc.date.none.fl_str_mv 2016
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/10915/85965
url http://sedici.unlp.edu.ar/handle/10915/85965
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1755-1307
info:eu-repo/semantics/altIdentifier/doi/10.1088/1755-1315/49/2/022007
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
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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score 13.13397

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