Study on Characteristics of Flow Aggregation and Dispersion Near Inlet/Outlet of Pumped Storage Power Station
The study of the hydrodynamic characteristics of the inlet/outlet area of pumped storage power station has guiding significance for ensuring the sand prevention and safe operation of the power station.The hydrodynamic character-istics of the inlet/outlet of the lower reservoir of MQ pumped storage power station are numerically simulated by using a two-dimensional unsteady hydrodynamic mathematical model.The results show that in the pumping condition,the up-stream"convergence"effect gradually decreases,and the downstream increases accordingly;In the process of releasing wa-ter to generate electricity,the upstream"dispersion"effect gradually decreases,and the downstream increases according-ly.Under the pumping condition,the flow pattern of the water near the inlet/outlet is generally smooth,and the circula-tion appears on the opposite bank,and gradually spreads and moves upstream.In the process of releasing water to gener-ate electricity,a circulation is formed on both sides of the inlet/outlet discharge flow,the upstream side circulation moves to the opposite bank and spreads upstream,and the downstream side circulation spreads downstream.The flow state of generation power condition is more complex than the pumping condition,and the number and scale of circulation are grea-ter than that of the pumping condition.The result can provide a basis for water intake and sand prevention and hydraulic design of the power station,as well as provide a reference for the construction of other types of PSPSs.
pumped storage power stationinlet/outletconvergencedispersionmathematical model
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维普
