基于分缝翼型设计的贯流泵水力特性研究

Study on Hydraulic Characteristics of Axial Flow Pump Based on Split Airfoil Design

沿海地区泵站运行扬程受潮水影响涨幅变化大,小流量工况下贯流泵水力性能难以保证,为有效解决传统单一工况设计的贯流泵叶轮性能难以满足多工况条件下的使用需求问题,在不改变叶轮基本参数的基础上,参照飞机襟翼设计方法,运用ANSYS CFX模拟仿真软件对叶轮截面翼型进行分缝设计及优化。计算结果表明,采用分缝设计的叶轮能有效抑制“马鞍区”的形成,可有效提高小流量工况下贯流泵的水力性能。

The running head of pumping stations in coastal areas varies greatly under the influence of tide,and the hydraulic performance of the axial flow pump is difficult to guarantee at low flow rates.In order to ensure the performance of axial flow pump impeller to meet the requirements of either single condition or multiple conditions,the section of impeller airfoil,referring to the design method of aircraft flaps,is segmentally designed and optimized by ANSYS CFX simulation software without changing the basic parameters of the impeller.The results show that the segmented impeller can effectively inhibit the formation of“saddle zone”,and the hydraulic performance of axial flow pumps is improved effectively at low flow rates.