Relationship between hydraulic performance of centrifugal pump and shape of impeller shroud

To study the flow behavior of centrifugal pump with different shapes of impeller under different operating conditions, CFD simulations were conducted, in which Reynolds Averaged Navier Stokes Equations are discretized by finite volume method, and the pressure-velocity relation was coupled by SIMPLE algorithm. According to the contours of static and dynamics pressure, it was found that different shape of impeller had much influence on the performance curve of centrifugal pump. The results indicate that the hydraulic model with linear shroud has higher head than that with circular shroud at design flow rate. And the value of head decreases while the flow rate increases. The performance curve has no hump. This study provides references for engineering applications.