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离心泵叶轮内二维PIV非定常流动测量

, PP. 56-60

Keywords: 离心泵,叶轮,PIV测量,非定常

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Abstract:

采用二维PIV对离心泵蜗舌附近旋转叶轮内的流场进行了测量,获得了5个不同相位的二维相对速度场。结果显示:在流量Q/Qbep=0.52时,叶轮内压力面存在逆时针方向的回流,叶片在靠近蜗舌时,吸力面存在顺时针方向的回流。在流量Q/Qbep=1.0时,叶轮出口存在射流/尾迹现象。研究表明:小流量工况下,蜗舌对叶轮内的相对速度场有显著影响,而在最优工况下影响较弱。

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