The Simulation of Internal Flow Field in Low-Specific-Speed Centrifugal Pump

The three-dimensional flow field of the low-specific-speed pump is analyzed numerically based on the Reynolds-Averaged Navier-Stokes equation and the Spalart-Allmaras turbulence model.The velocity and pressure distribution of complex-impeller pump is obtained.Under different flow-rate,the simulation results of impeller and volute reveal the important features of pump and verify the asymmetry of the internal flow due to the interaction of impeller and volute.The results also indicate that the structure of internal flow field and performance of pump with complex-impeller can be predicted by the simulation of flow field exactly.