Numerical and Experimental Study of Axial Force and Hydraulic Performance in a Deep Well Centrifugal Pump With Different Impeller Rear Shroud Radius

Abstract

A multistage deepwell centrifugal pump (DCP) with different impeller rear shroud radius have been investigated both numerically and experimentally under multiconditons, which aims at studying the influence of impeller rear shroud radius to the axial force and pump hydraulic performance. During this study, a twostage DCP equipped with three different impellers was simulated employing the commercial computational fluid dynamics (CFD) software ANYSYFluent to solve the NavierStokes equations for threedimensional steady flow. Highquality structured grids were meshed on the whole computational domain. Test results were acquired by prototype experiments, and then compared with the predicted pump performance and axial force. The static pressure distribution in the pump passage obtained by numerical simulation was analyzed. The results indicated that the appropriate impeller rear shroud radius could improve the pump performance and lower the axial force significantly.