Design Method for Impeller of Centrifugal Pump with Guide Vanes Based On Oseen Vortex

Abstract

Centrifugal pumps with guide vanes are widely used in pump as turbine, energy storage pump station and water diversion project. In this work, a theoretical prediction model based on fluid governing equation and Oseen vortex model is proposed to predict the velocity moment downstream the impeller of centrifugal pump. Then, an optimization design method is established to optimize the impeller of centrifugal pump with guide vanes. A centrifugal pump with specific speed of 127 is used to validate the theoretical prediction model, results of velocity moment show that the deviation between predicted and simulated results is below 0.5% in average. Finally, the optimization design method is applied, results show that the average efficiency of optimal pump under the working conditions is 1.04% higher than that of baseline pump, which validates the reliability of proposed optimization method by theoretical prediction based on Oseen vortex. Analysis on velocity distribution and turbulence eddy dissipation shows that the optimization design method based on Oseen vortex can effectively improve the flow pattern and pump performance.