Optimization design of stainless steel stamping well pump based on response surface method

Combined with the technological features of stamping and welding pump, this research was taken on raising the efficiency of stamping well pump, using hydraulic design of impeller and flow field computation technology of the modern CFD and the quadratic regression orthogonal test method. The experiment was designed with three factors including outlet angle, outlet width and outlet slope. 16 impellers were designed. The whole flow field of two-stage well pump at the operating point for design was simulated by FLUENT using the standard model, SIMPLEC algorithm, second-order upwind scheme. 16 groups of efficiency in the design schemes were obtained. Use quadratic regression equation to fit the function relationship between the response values and each factor. Through the analysis of the regression equation, the optimal combination of geometric parameters can be found. The result would be instructive to the design of stamping well pump which is designed by the impeller diameter maximum approach.