Failure investigation of a Francis turbine under the cavitation conditions

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Title:	Failure investigation of a Francis turbine under the cavitation conditions
Author:	Liu, Xin; Wang, Zhengwei; Zhou, Lingjiu; Escaler Puigoriol, Francesc Xavier
Other authors:	Universitat Politècnica de Catalunya. Departament de Mecànica de Fluids; Universitat Politècnica de Catalunya. CDIF - Centre de Diagnòstic Industrial i Fluidodinàmica
Abstract:	Acoustic-Structural coupling methodology has been used to numerically investigate the failure of a Francis turbine runner that broke down within one day of operation. The goal of the work has been to determine the feasibility of a resonance condition under cavitating flow conditions. The obtained results prove that the presence of large vapor cavities increase the natural frequencies of the diametrical modes of vibration in comparison with the pure water condition. In particular, a possible tuning between the hydrodynamic excitation and the 4ND mode has been found.
Subject(s):	-Àrees temàtiques de la UPC::Enginyeria mecànica -Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids -Cavitation -Turbines -Turbine failures -Acoustic FSI -Cavitation -Resonance -Cavitació -Turbines
Rights:	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Conference Object
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