Return Vane Installed in Multistage Centrifugal Pump

Abstract

The effects of the diffuser vane on the performances of the multistagecentrifugal pump were investigated experimentally, taking accountof the interactions among the diffuser vane, the return vane, andthe next stage impeller. It is very important to match well the diffuservane with the return vane, for improving the hydraulic efficiencyof the pump. The efficiency may be more improved by making the cross-sectionalarea of the channel from the diffuser vane outlet to the return vaneinlet larger, as much as possible.