Numerical simulation of three-dimensional flow field in centrifugal pump with deviated short splitter vanes

Improving hydraulic properties to elevate the efficiency is an important research content in optimization design of centrifugal pumps. Based on the Reynolds time averaged N-S equations (RANS) and RNG κ-ε turbulence models, the three-dimensional flow field of the IS65-40-250 centrifugal pump with deviated short splitter vanes was simulated in Fluent software. The velocity and pressure of the flow in the centrifugal pump were analyzed and the internal flow rule was revealed. The result showed that by design of short splitter vane, the velocity and uniformity of pressure distribution in the centrifugal pump were improved, and the pressure pulse of impeller exit decreased, and the loss of impact was reduced. According to calculation of head and waterpower efficiency of the improved pump, the head and waterpower efficiency increased by 3.46% and 1.7% respectively, and the purpose of energy saving was achieved.