Numerical Simulation of Internal Flow in "S" Shaped Outlet Conduit

Base on the stander k-e turbulent model and Reynolds Navier-Stokes equation, the hydraulic performance of the S-shaped shaft pumping station is simulated with the commercial CFD software, and the experiment results are compared with the CFD results. By comparing the relationship of the average swirl angel in the inlet and the hydraulic loss coefficient of the outlet conduit, the hydraulic performance of S-shaped outlet conduct is analyzed, we find that there is a optimal average swirl angel value for hydraulic loss coefficient. In this paper, the optimal average swirl angel is 5.3 degree, and the hydraulic loss coefficient is 0.000162. By analyzing the static pressure and total pressure distribution curve, the conclusion below can be drawn: the reason for the large hydraulic loss is average swirl angel value is large at the small discharge, on the contrary the reason for the large hydraulic loss is velocity at large discharge.