Hydraulic structure optimization of centrifugal pump based on orthogonal test

Abstract

Abstract To reduce global carbon emissions and reduce the energy consumption of pumps, it is necessary to continuously improve the performance efficiency of pumps. In this paper, the blade wrapping angle, inlet mounting angle and outlet mounting angle are selected as the design variables, and the hydraulic structure of the pump is orthogonally optimized. Through experiments and simulations, the internal flow bonding and external energy characteristics of the centrifugal pump under different orthogonal test combinations were compared, and finally the impeller wrapping angle was 130 degrees, the outlet installation angle was 20 degrees, and the inlet installation angle was 40 degrees. It is found that compared with the original design scheme, the efficiency of the optimized scheme under the design flow rate is increased by 2.775%, and the hydraulic loss in the impeller is reduced by 1.18%. The main and secondary orders of influence of parameter factors on lift and efficiency are impeller wrapping angle, impeller outlet mounting angle, and impeller inlet mounting angle. The internal flow of the optimized impeller is significantly improved, and the flow loss is reduced. The research results provide a design basis for further improving the hydraulic performance of centrifugal pumps.