轴流泵叶轮出口轴面速度和环量的试验研究  

Experimental investigation of meridional velocity and circulation in axial-flow impeller outlet

作　　者：张德胜[1] 李通通[1] 施卫东[1] 张华[1] 张光建[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,镇江212013

出　　处：《农业工程学报》2012年第7期73-77,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(51109093;51079063);江苏省自然科学基金(BK2011503);国家博士后科学基金(2011M500117);江苏省博士后基金(1101019B);东南大学水声信号处理教育部重点实验室开放研究基金(UASP1006);江苏大学高级人才启动基金(11JDG038)

摘　　要：为了研究系列高效轴流泵叶轮出口轴面速度和环量分布规律,设计了叶轮出口流场测量装置。基于流体绕流圆球理论,采用微型五孔探针对高效轴流泵叶轮出口轴面速度和环量进行了试验测量。试验结果表明,在最优工况下,系列高效轴流泵模型叶轮出口轴面速度呈二次抛物线流型,其最大值出现在叶片中部,且轮缘侧较小的轴面速度提高了汽蚀性能;系列高效轴流泵叶轮出口呈非线性环量分布规律,在轮毂侧环量稍小,在叶片中部较为平直,在轮毂侧环量降低至中部的0.8倍左右,而轮缘侧增大至1.2倍左右;同时叶轮出口轴面速度分布呈现抛物线流型,叶片中部速度最大。测量的轴面速度和环量分布数据拟合成多项式数学模型,可为轴流泵叶轮水力设计提供参考。In order to investigate the meridional velocity and circulation distribution in axial-flow impeller outlet,the measuring device was designed to measure a series of high efficiency axial flow pump models.A miniature five-hole spherical probe based on flow around a sphere the principle was used to measure the meridional velocity and circulation in axial-flow impeller outlet in multi-conditions.The experimental results show that meridional velocity distribution in axial-flow impeller outlet is parabolic flow pattern in optimal conditions.The maximum meridional velocity is located in the middle of blade,while meridional velocity decreases near the hub and flange region.Non-linear circulation distribution occurs in the flow field of impeller outlet,the circulation curve is relatively flat in the central of blade,while it reduces to about 0.8 times near hub and increases to about 1.2 times near tip.The measurement data of axial velocity and circulation is synthesized polynomial equations,which will provide reference for the axial-flow impeller hydraulic design.

关 键 词：轴流 泵 试验 叶轮 环量 轴面速度 五孔探针 

分 类 号：TH311[机械工程—机械制造及自动化]