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中文摘要：
为了揭示低比转数离心泵内部流动特征，采用粒子图像测试（PIV）技术对3个工况6个不同相位离心泵内的流动情况进行了试验研究，获得了泵内的动压及速度矢量的分布情况．试验结果表明：设计工况下，不同相位叶轮各流道内的动压分布基本一致，且随着半径的增加，动压值也有所增加；在f一0和t=2T／6相位，相位不同工况w／u比值的最大值靠近吸力面处，而在t=4T／6相位，最大值出现在流道中间区域，这说明隔舌对于流道内的速度分布有较大影响；随着流量的增加，蜗壳内的绝对速度也随之增加，在同一工况的不同相位，蜗壳内的速度基本相同．
英文摘要：
In order to study internal flow variation of low specific speed pump, an experimental investigation of internal flow in the pump was conducted at three different flow rates on six phase position by means of PIV （particle image velocimetry）. The dynamic pressure and velocity vector distribution was obtained. The results of experiment show that dynamic pressure distribution of the impeller is in substantial agreement at design conditions for different phase position. The dynamic pressure increases with the increase of radius. The maximum of w/u ratio is near suction surface at the t=0 and t= 2T/6, but in the middle flow field at the t= tongue on the vo/u ratio are more significant. crease flow rate. The absolute velocity in th condition for different phase positions. 4T/6. The results show that the effects of t The absolute velocity in the volute increases wi e volute is in substantial agreement at the same he volute th the in- flow rate
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