基于粒子图像测速的离心泵叶轮内流动分离测试与分析

被引：6

作者：

吴贤芳 ^{[1
]}

刘厚林 ^{[2
]}

杨洪镔 ^{[2
]}

谈明高 ^{[2
]}

王凯 ^{[2
]}

机构：

[1] 江苏大学能源与动力工程学院

[2] 江苏大学流体机械工程技术研究中心

来源：

农业工程学报 | 2014年 / 30卷 / 20期

关键词：

离心泵; 叶轮; 速度; 流动分离; 粒子图像测速;

D O I：

暂无

中图分类号：

TH311 [离心泵];

学科分类号：

摘要：

离心泵在小流量工况下运行极易产生流动分离,严重影响泵的运行稳定性。为了揭示离心泵小流量工况下叶轮内流动分离的变化规律,对一比转数为73的离心泵小流量工况下叶轮内部流动进行了PIV测试和分析,并以流动偏移角和回流强度为参数对测试结果做了量化分析。不同工况的测试结果表明,0.6Qd工况下叶轮内开始出现流动分离,到0.2Qd工况下流动分离已发展充分;随着流量的降低分离泡向流道中部和出口方向移动发展。0.2Qd工况下不同相位的试验结果显示叶轮流道接近隔舌时会出现分离泡,经过隔舌后分离泡迅速发展,远离隔舌后分离泡逐渐消失。流动偏移角的量化分析能够准确反映出叶轮流道内分离泡的数目;回流强度的量化分析表明叶片旋转过隔舌135°后,动静干涉对流动分离的作用明显减弱。

引用

页码：51 / 57

页数：7

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