Performance Enhancement of a Pump Impeller Using Optimal Design Method

摘要

This paper presents a parametric study on the effect of the blade shape of a regenerative pump by using computational fluid dynamics(CFD) and design of experiment(DOE).Two design parameters defined the shape of a pump impeller are introduced to enhance a pump performance.To analyze three-dimensional flow field in the pump, general analysis code, CFX, is employed in the present work.SST turbulence model is employed to estimate the eddy viscosity.The experimental apparatus with an open-loop facility is set up for measuring the pump performance.The numerical model is validated by comparison of pressure rise with the results of experimental data.In the present study, throughout the shape optimization of the pump at the operating flow condition, the pump efficiency is successfully increased by 2.5 ％ point compared to reference one.It is found that the torque reduction of the pump impeller is relatively effective to improve the pump efficiency compared to pressure increase.Effects of the pump blade shapes on the efficiency are also investigated and discussed in detail.