Simulation and Verification of Hydraulic Performance in the Enclosed Suction Sump of the Axial Flow Pumping System

The internal flow characteristics and performance prediction of the axial flow pumping system is simulated by using N-S equation combined with k-ε standard turbulence model through the commercial Computation Fluid Dynamic（CFD）applications. The experimental test data of pumping system is obtained from the flow range of 22～40 kg/s,and 7 flow values are selected. The results show that a good agreement is achieved between the small flow condition and the design flow conditions.The large flow condition is complicated under the enclosed suction sump,in which a considerable difference with experimental data exists. Meanwhile,the results indicate that the obvious wall vortex is captured at the same position above the horn tube,which verifies the effectiveness and reliability of the numerical simulations.