离心泵叶轮导叶动静干涉的PIV测试

发布时间：2018-05-03 02:06

本文选题：离心泵 + PIV　；参考：《中国农村水利水电》2016年07期

【摘要】：对一比转速为111的导叶式离心泵采用PIV测试技术在0.6Qd、0.8Qd、1.0Qd、1.2Qd、1.4Qd等5个不同流量工况下进行了内流测量。为了保证PIV测试精度,本研究采用了由可以避免变频器干扰信号的光纤来制作的外触发同步系统和等效标定方法两项关键技术。基于自编的PIV速度合成程序,将PIV测出的圆周速度与绝对速度合成得到相对速度。结果表明:在1.0Qd~1.4Qd范围内的流态相对0.6Qd、0.8Qd工况下较好,未出现漩涡;导叶叶片凸面没有产生回流,但存在低速区域;正对环形压水室出口的导叶流道内,导叶叶片凸面出口区域的速度较小,但没有出现明显的漩涡。
[Abstract]:The inner flow of a centrifugal pump with a specific speed of 111 is measured by PIV technique under five different flow conditions, such as 0.6 Qdl0. 8Qd1. 0Qd1. 2Qd1. 4Qd. In order to ensure the accuracy of PIV testing, two key techniques of external trigger synchronization system and equivalent calibration method are adopted in this study, which are made of optical fiber which can avoid frequency converter interference signals. Based on the self-compiled PIV velocity synthesis program, the relative velocity is obtained by combining the circular velocity measured by PIV with the absolute velocity. The results show that the flow pattern in the range of 1.0Qd~1.4Qd is better than that in the 0.6 Qdl0. 8Qd condition, and there is no swirl in the vane convex surface, but there is a low speed region in the convex surface of the guide vane, and the flow channel of the guide vane at the outlet of the annular water chamber is opposite to that of the annular water chamber outlet. The velocity at the outlet of the convex surface of the guide blade is small, but there is no obvious swirl.
【作者单位】：江苏振华泵业制造有限公司;江苏大学流体机械工程技术研究中心;江苏大学能源与动力工程学院;
【基金】：国家自然科学基金(51209105,51509109) 江苏省产学研项目(BY2014123-09)
【分类号】：TH311

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