The Distribution of Pressure and Vorticity of Impellers with Single-Rotary and Multi-Rotary

Abstract

Abstract The screw-type centrifugal pumps with different impellers are studied. The structure of single-rotary and multi-rotary impellers are designed by the CAD method. The governing equation of fluid flow and SST k-ω model are applied to simulate the internal flow field by computational fluid dynamics method. The pressure distribution and vorticity distribution are calculated and analyzed. It is found that the pressure distribution and vorticity distribution of the two types of impellers are significantly different. The pressure distribution of single-rotary impeller is relatively uniform. The vorticity of single-rotary impeller is larger than multi-rotary impeller.