Francis turbine high load instabilities – Model test and CFD simulation

When operating under high load conditions, Francis turbines tend to develop a typical central vortex located under the runner cone. Usually, this central vortex has an axisymmetric main part with helicoidal tail. Under cavitating conditions, this central vapor cavity may become unstable, generating...

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Detalles Bibliográficos
Autores principales:	Rodríguez, Daniel Amancio, Rivetti, Arturo, Angulo, Mauricio Abel, Lucino, Cecilia Verónica, Liscia, Sergio Oscar
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2019
Materias:	Ingeniería Physics Vortex Computational fluid dynamics Cavitation Instability Francis turbine Scale (ratio) Rotational symmetry Mechanics Flow (psychology)
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/125021
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-125021
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ingeniería Physics Vortex Computational fluid dynamics Cavitation Instability Francis turbine Scale (ratio) Rotational symmetry Mechanics Flow (psychology)
spellingShingle	Ingeniería Physics Vortex Computational fluid dynamics Cavitation Instability Francis turbine Scale (ratio) Rotational symmetry Mechanics Flow (psychology) Rodríguez, Daniel Amancio Rivetti, Arturo Angulo, Mauricio Abel Lucino, Cecilia Verónica Liscia, Sergio Oscar Francis turbine high load instabilities – Model test and CFD simulation
topic_facet	Ingeniería Physics Vortex Computational fluid dynamics Cavitation Instability Francis turbine Scale (ratio) Rotational symmetry Mechanics Flow (psychology)
description	When operating under high load conditions, Francis turbines tend to develop a typical central vortex located under the runner cone. Usually, this central vortex has an axisymmetric main part with helicoidal tail. Under cavitating conditions, this central vapor cavity may become unstable, generating synchronic pressure pulsations (known as self-excited oscillations) which propagate into the entire machine. The volume of the vapor cavity is a relevant feature as it influences the frequency of these pressure pulsations. Numerical flow simulations together with model test measurements and visualizations allow the characterization of the high load vortex pattern developed under different operating and Sigma plant conditions. In this work, model tests and transient two-phase CFD simulations were carried out for a medium-head Francis model scale operating under high load conditions. The vortex instability zone measured and numerical simulated on model scale is presented.
format	Articulo Articulo
author	Rodríguez, Daniel Amancio Rivetti, Arturo Angulo, Mauricio Abel Lucino, Cecilia Verónica Liscia, Sergio Oscar
author_facet	Rodríguez, Daniel Amancio Rivetti, Arturo Angulo, Mauricio Abel Lucino, Cecilia Verónica Liscia, Sergio Oscar
author_sort	Rodríguez, Daniel Amancio
title	Francis turbine high load instabilities – Model test and CFD simulation
title_short	Francis turbine high load instabilities – Model test and CFD simulation
title_full	Francis turbine high load instabilities – Model test and CFD simulation
title_fullStr	Francis turbine high load instabilities – Model test and CFD simulation
title_full_unstemmed	Francis turbine high load instabilities – Model test and CFD simulation
title_sort	francis turbine high load instabilities – model test and cfd simulation
publishDate	2019
url	http://sedici.unlp.edu.ar/handle/10915/125021
work_keys_str_mv	AT rodriguezdanielamancio francisturbinehighloadinstabilitiesmodeltestandcfdsimulation AT rivettiarturo francisturbinehighloadinstabilitiesmodeltestandcfdsimulation AT angulomauricioabel francisturbinehighloadinstabilitiesmodeltestandcfdsimulation AT lucinoceciliaveronica francisturbinehighloadinstabilitiesmodeltestandcfdsimulation AT lisciasergiooscar francisturbinehighloadinstabilitiesmodeltestandcfdsimulation
bdutipo_str	Repositorios
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Francis turbine high load instabilities – Model test and CFD simulation

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