Dynamics of the precessing vortex rope and its interaction with the system at Francis turbines part load operating conditions

Abstract

At part load conditions, Francis turbines experience the formation of a cavitation vortex rope at the runner outlet whose precession acts as a pressure excitation source for the hydraulic circuit. This can lead to hydro-acoustic resonances characterized by high pressure pulsations, as well as torque and output power fluctuations. This study highlights the… (More)

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