摘要
设计了一副5叶片的低比转数离心泵叶轮,并应用二维粒子图像速度仪(P IV)成功地测试了转速1250 r.m in-1下5个不同工况以及相同流量、转速分别为1 000,750 r.m in-1工况下叶轮内的瞬时流场.测试结果充分揭示了叶轮内相对速度矢量场的特征及其分布规律.结果表明:离心泵叶轮通道内液体受曲率、旋转产生的离心力和科里奥力作用,相对速度由叶片进口吸力面高、压力面低滑移为出口压力面高、吸力面低,叶轮内部的流动呈现非对称、非均匀特点;相同流量不同转速下叶轮内部流场的规律基本相似,但流动偏转角(Δβ)随转速增大而增大.
A five-blade centrifugal pump impeller was designed for experiment. Detailed 2D PIV measurements of flow fields about five different flux inside the same rotating blade to blade passage have been successfully performed in conjunction with the overall pump performance measured separately under rotation speed 1 250 r · min^-1. The complex internal flow patterns were acquired and the relative velocity varying law near the suction side and pressure side were also revealed. According to results, the conclusion comes to light that higher relative velocity on the suction surface than on the pressure surface near entry region converts to lower relative velocity on the suction surface than on the pressure surface near blade outlet due to the effects of centrifugal force and Coliros force. At different rotation speeds 1 000 r · min^-1 and 750 r · min^-1, the internal flow characteristics about the same flux is similar and the varying angle （△β） is larger at higher speed.
出处
《扬州大学学报（自然科学版）》
CAS
CSCD
2006年第1期74-78,共5页
Journal of Yangzhou University：Natural Science Edition
基金
江苏省重点实验室开放基金项目(KJS02035)
扬州大学科研基金资助项目(G0211086)
关键词
低比转数
离心泵
粒子图像测速仪
内部流动特性
low specific speed
centrifugal pump
particle image velocimetry
internal flow characteristics
