Numerical Simulation On Hydrodynamic Characteristics Of Bu-type Bifurcated Pipe In Pumped Storage Power Station

In this paper, I combined the studies of high-pressure water pumped-storage power station fork tube with three-dimensional numerical simulation method and three-dimensional k ?εturbulence model to explore and demonstrate the unit under the various possible ways of running on the hydraulic characteristics of bifurcated pipes.The main bifurcated pipe's diameter is 8.1m, the branch pipe'diameter is 3.6m, in early state, given the stand-alone electrical flow is 73 m3/s, maximum pumping head stand-alone flow is 63 m3/s.(1) study the bifurcated pipe's head loss under a variety of operating conditions of the power generation and water pumping. For the generating electricity conditions, three machines are running under a rated flow, 1 # branch pipe's head loss is 0.523m, 2 # branch pipe head loss is 1.361m, 3 # branch pipe's head loss is 1.521m. For the pumping conditions, the three machines rated flow of run-time, 1 # branch pipe's head loss is 0.427m, 2 # branch pipe's head loss is 0.723m, 3 # branch pipe's head loss is 1.365m.(2) study the power generation and water pumping in various of operating conditions on the velocity of distribution inside of the fork tubes. The main pipe and the branch pipes'flow evenly distributed.(3) study the power generation and water pumping in various of operating conditions bifurcated flow's pattern inside of the fork tubes. Bifurcated pipes have a smooth and stable flow pattern.(4) analyse the simulation results, the bifurcated pipe's size of the high-pressure water pumped storage power station designed is accord with hydraulic requirements.