... total load rejection and are forced to shut down immediately. The turbine runner accelerates to runaway speeds in a few seconds, inducing high-amplitude, unsteady pressure loading on the blades. This sometimes results in a failure of the turbine components. Moreover, the unsteady pressure loading...

..., 2012. Assoc. Editor: Frank C. Visser. 09 03 2012 24 10 2012 A numerical model that considers the interaction between the ring gate and its neighboring components was used to simulate the emergency shutdown process of a ring gate in hydraulic turbine runaway. The three-dimensional...

... pump-turbine turbine brake operation numerical simulation CFD measurement runaway speed no load variable boundary conditions flow separation Reversible pump-turbines utilize excess energy available in electrical grids for pump mode operation and produce peak energy in turbine mode...