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

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 tes...

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Detalles Bibliográficos
Autores principales: Rivetti, Arturo, Angulo, Mauricio Abel, Lucino, Cecilia Verónica, Hene, M., Capezio, O., Liscia, Sergio Oscar
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85965
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85965
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
spellingShingle Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
topic_facet Ingeniería Hidráulica
Hidromecánica
Cavitation
Hydrofoils
Attached cavity
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).
format Articulo
Articulo
author Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
author_facet Rivetti, Arturo
Angulo, Mauricio Abel
Lucino, Cecilia Verónica
Hene, M.
Capezio, O.
Liscia, Sergio Oscar
author_sort Rivetti, Arturo
title Implementation of pressurized air injection system in a Kaplan prototype for the reduction of vibration caused by tip vortex cavitation
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
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/85965
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