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Numerical modal analysis of a Kaplan turbine runner

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hdl:2117/335438

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Roig Bauzà, RafelMés informació
Torre Rodríguez, Óscar de laMés informació
Jou Santacreu, EstebanMés informacióMés informacióMés informació
Escaler Puigoriol, Francesc XavierMés informacióMés informacióMés informació
Document typeConference lecture
Defense date2020
Rights accessOpen Access
Attribution-NonCommercial-ShareAlike 3.0 Spain
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution-NonCommercial-ShareAlike 3.0 Spain
ProjectAFC4Hydro - Active Flow Control system FOR improving HYDRaulic turbine performances at off-design Operation (EC-H2020-814958)
Abstract
The aim of the research has been to investigate the change of dynamic behavior of a Kaplan turbine runner when submerged in still water. More specifically, the effects of the added mass on the modes of vibration have been quantified. For that, the modes of vibration of the runner in vacuum, in air and in water have been simulated with a coupled Acoustic-Structural modal analysis and, from their comparison, the reduction of the natural frequencies and the possible changes of the mode shapes have been determined. The results show that the typically assumed invariance of all the mode shapes of a structure when submerged in a dense fluid is not fully accomplished in this particular geometry. And regards to the frequency reduction ratios, they are found to be similar for the first six modes with an average value of about 37%.
CitationRoig, R. [et al.]. Numerical modal analysis of a Kaplan turbine runner. A: IAHR Young Professionals Congress. "Proceedings of the 1st IAHR Young Professionals Congress". 2020, p. 144-145. ISBN 978-90-82484-6-63. 
URIhttp://hdl.handle.net/2117/335438
ISBN978-90-82484-6-63
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  • Departament de Mecànica de Fluids - Ponències/Comunicacions de congressos [209]
  • Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica - Ponències/Comunicacions de congressos [66]
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