Interaction of a pulsating vortex rope with the local velocity field in a Francis turbine draft tube

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At part load conditions, Francis turbines are subject to the emergence of a hydrodynamic instability in their draft tube, referred to as precessing vortex rope. It induces pressure pulsations in the water passages at the precession frequency of the vortex, ...

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Hydroelectric units can be operated in synchronous condenser mode to provide reactive power to the electrical power system (EPS) for voltage regulation. In this operating mode, the hydraulic turbine consumes active power and in case of hydroelectric units ...

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Interaction of a pulsating vortex rope with the local velocity field in a Francis turbine draft tube

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