1D hydro-electric models are useful to predict dynamic behaviour of hydro-power plants. Regarding vortex rope and cavitation surge in Francis turbines, the 1D models require some inputs that can be provided by numerical simulations. In this paper, a 2D cavitating Venturi is considered. URANS computations are performed to investigate the dynamic behaviour of the cavitation sheet depending on the frequency variation of the outlet pressure. The results are used to calibrate and to assess the reliability of the 1D models.
Détails
Titre
Identification of the wave speed and the second viscosity of cavitation flows with 2D RANS computations - Part I
Auteur(s)/ trice(s)
Decaix, Jean (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO University of Applied Sciences Western Switzerland) Alligné, S. (Power Vision Engineering Sàrl, Ecublens, Switzerland) Nicolet, Christophe (Power Vision Engineering Sàrl, Ecublens, Switzerland) Avellan, François (EPFL, Lausanne, Switzerland) Münch-Alligné, Cécile (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO University of Applied Sciences Western Switzerland)
Date
2015-12
Publié dans
Proceedings of 9th International Symposium on Cavitation (CAV2015), 6–10 December 2015, Lausanne, Switzerland ; Journal of Physics: Conference Series
Volume
2015, vol. 656, article no. 012060
Editeur
Lausanne, Switzerland, 6-10 December 2015
Pagination
4 p.
Présenté à
9th International Symposium on Cavitation (CAV2015), Lausanne, Switzerland, 2015-12-06, 2015-12-10
