With the development of the industry, the application of the pump is is expanding gradually. It is becoming more strict in hydraulic performance and operation stability. The impeller, as a major flowing-through parts, whose working performance and efficiency are playing a vital part in the working performance of the centrifugal pump. On the other hand, the impellers are involved in the complicated combination of the centrifugal force and water pressure. The numerical simulation and finite-element analysis a...