Flow Patterns in River-type Reservoirs of Pumped Storage Power Stations
In this paper,a combination of model tests and numerical simulations is used to study the flow patterns and hydrodynamic characteristics of the river-type reservoir in a pumped storage power station.Based on the identified issues in the original plan,an optimized solution is proposed.The results indicate that under the original plan,at the design flow rate for both power generation and pumping operations at dead water level,the flow at the inlet/outlet is smooth,and the reservoir surface remains stable,with no significant adverse flow patterns such as strong recirculation or air-entraining vortices.However,under 2.5 times the design flow rate during pumping operations,the reservoir surface experiences significant fluctuations,and intermittent air-entraining vortices appear on the water surface above the inlet/outlet.The optimized plan effectively eliminates these vortices by either extending the boundary of the left-side slope of the forebay or installing baffles above the structure,thus preventing the formation of the first and second stages of air-entraining vortices.
pumped storage power stationsflow patterns in reservoirair-entraining vorticesmodel testsnumerical sim-ulations
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