Oscillation often occurs in a cavitating highspeed pump because of reciprocal action of inlet reverse flow and cavitation under low flow rate and low suction pressure.
水泵在小流量、低进口压力情况下容易受进口回流和空泡的相互作用而发生低频空泡脉动现象，严重影响供水系统的安全运行。
The effects of the impeller geometrical parameters mentionedabove on the inlet reverse flow diffusio.
根据实验结果，讨论了回流的发生机理，提出了利用准三元流场计算和前盖板上紊流边界层计算相结合的方法，来预估常规叶片数的闭式叶轮进口回流发生点。
The inlet reverse flow onset points of those impellers were also observed.
弄清了上述叶轮参数对进口回流初始流量和进口流场的影响。