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。
Inner flow in a double-blade impeller, whose specific speed is 111, is measured under 0.6Qd、0.8Qd、1.0Qd、1.2Qd、1.4Qd working conditions by using PIV test technology. In order to ensure the accuracy of PIV test, the external trigger synchronization system made with fiber optic and equivalent calibration method is applied. In Visual C＋＋2005 platform,, according to the velocity triangle, PIV velocity synthetic procedure is compiled to obtain the relative velocity synthesized by the absolute velocity and the circu lar velocity. The results show that the flow pattern in the 1.0Qd-1.4Qd range relative 0.6Qd-0.8Qd, does not produce whirlpool. There is a low velocity region blade convex seeker, but there is no return.
出处
《中国农村水利水电》
北大核心
2016年第7期112-115,共4页
China Rural Water and Hydropower
基金
国家自然科学基金(51209105
51509109)
江苏省产学研项目(BY2014123-09)
