高比转速离心泵由于流道较宽,叶片扭曲较大,基于一元理论的传统离心泵叶片设计方法并不适用。本文对一种采用速度系数法设计的高比转速(n_s=271)潜水泥泵叶轮进行了泵内三维流场的数值模拟;根据泵内流动计算结果,基于涡动力学的边界涡量流(BVF)诊断方法,通过调整叶片设计参数和轴面流线对泵的叶轮进行了优化。结果表明;优化后的泵水力性能得到了较大改善;借助BVF的流场诊断方法可有效地捕捉到泵内不良流动的根源,从而为改善叶片设计指引方向。 Centrifugal pump with high specific speed has wider twist and large blade distortion. The traditional centrifugal pump blade design method based on unary theory is not suitable. In this paper, a numerical simulation of three-dimensional flow field in a pump with a high specific speed (n_s = 271) submersible pump impeller designed by the speed coefficient method was carried out. Based on the calculation results of the flow in the pump, the boundary vorticity flow based on the eddy dynamics BVF), the impeller of the pump is optimized by adjusting the blade design parameters and axial flow lines. The results show that the optimized pump hydraulic performance has been greatly improved. With BVF flow field diagnosis method, the root causes of poor flow in the pump can be effectively captured, so as to improve the direction of blade design.