Numerical simulation for 3D turbulent flow and hydraulic loss of inlet conduit for pumping station

Consistent with the method of separately testing hydraulic performance of inlet conduit,a new method to separately calculate hydraulic performance of inlet conduit is put forward.Problems relative to the numerical simulation,such as calculation region,boundary conditions,grid generation etc.are introduced.Examples about the flow pattern simulation and hydraulic loss calculation of 3 types of inlet conduit,including elbow inlet,bell-like inlet and dustpan-like inlet are illustrated.Numerical calculation results are compared with those from model tests.The results indicate that the method of 3-D numerical calculation can calculate the hydraulic loss of inlet conduit with good accuracy and the loss can be verified conveniently by model test.Furthermore,the method could be applied to examine and evaluate the hydraulic performance of inlet conduit,which will create a necessary condition for the hydraulic optimum design with multi-plans.