Three-dimensional Hydrodynamic Numerical Simulation for Reconstruction Project of Forebay of Pumping Station
Due to large sediment content in water source,a pumping station currently uses round sumps for water in-take.Due to its small space,the water flow pattern in sumps is disordered during operation,which is easy to cause cavi-tation damage to pumping station units.Taking three-dimensional hydrodynamic numerical simulation as main means,RNG κ-ε turbulence model was used to simulate the water flow pattern in pumping station before and after reconstruc-tion.The hydrodynamic characteristics at different positions in pumping station forebay and intake pipes were compared under different reconstruction schemes.The results show that the water flow pattern in the forebay can be significantly improved by reconstructing round sumps into a holistic rectangular pumping station forebay and changing orifice flow at the connection between the current division channels and forebay into open channel flow;The three forebay optimization layout schemes proposed have similar improvement amplitude in velocity size,velocity rotation angle and uniformity de-gree;The cross section average velocity and velocity rotation angle at intake pipe can be used to quantitatively evaluate the reconstruction project scheme of pumping station forebay.
pumping stationforebayreconstructionhydrodynamic characteristicRNG κ-ε model
万方数据
维普
