Effect of Radial Guide Vane Optimization on the Performance of Multistage Centrifugal Pump

Abstract

The optimization of radial guide vane structure is the key measure to reduce the hydraulic loss of the component. The research model for this paper is a multistage centrifugal pump with a radial guide vane. Based on the SST k–ω turbulence model and using CFD numerical simulation technology to imitate and forecast multistage pump performance. The influences of radial guide vane blade numbers and return guide vane circumferential distribution position optimization on the multistage pump transportability are studied. The internal fluidity characteristics and transport performance of multistage centrifugal pumps with different guide vane structures are obtained. The results show that the hydraulic efficiency increases by 1.11% when the number of return guide blades is 9. When the return guide vane rotated 8° axially, had best performance optimization result, the efficiency and head of centrifugal pump are increased by 0.54% and 1.54% respectively. The change of circumferential distribution position will increase the ratio of hydraulic loss of radial guide vane, while the ratio of hydraulic loss of volute decreases. The research results can provide reference for radial guide vane optimal design of multistage centrifugal pump.