Numerical Simulation On The Vertical Pipe Intake Of Pumped Storage Plants

The vertical pipe intake with plate will be adopted in the upper reservoir of Xilongchi Pumped Storage Plant. There is not a practical project of vertical pipe intake with plate in upper reservoir of pumped storage plant in China until now. The intake at upper reservoirs of pumped storage plant is an important component of the water conveyance system. Because the hydraulic characteristics of this type intake are complex, hydraulic characteristics shoud be studied elaborately.The hydraulic characteristics of a vertical pipe intake with plate in the upper reservoir of a pumped storage plant in the pumping condition and powering condition were investigated suing k-εturbulent model. The 2-D k-εturbulent model have been used to study the flow distribution of the pumping condition and powering condition. The flow distribution, velocity distribution at outlets, and flow characteristics in the vertical pipe intake are studied by changing the vertical pipe intake. The results of numerical simulation are coincident with the results of physical model test. It is predicted that the bend shape is very important to the flow distribution.The 3-D k-εturbulent model have been used to study the hydraulic characteristics of the pumping condition and powering condition. The head loss, velocity distribution and pressure distribution in the vertical pipe intake are studied. The reason of reverse flow has been discovered by numerical calculation method. The results of numerical calculation are coincident with the results of physical model test. Based on the original intake pattern, twelve intake patterns are simulated and the optimum pattern is put forward.