An Optimal Design for Low-Specific-Speed Impeller

The efficiency of a centrifugal pump is determined on the Hydraulic Model of impeller,disk friction loss of impeller is proportional to outlet diameter loss of 5-power,and reducing outlet diameter is an important method for improving efficiency of a pump.This paper uses impeller parameters to modify and optimize geometrical parameters of impeller blades,and calculate outlet angles of blade according to literature when outlet diameter of impeller is minimum.This approach maximizes the efficiency of impellers.