Performance Curve Instability of a Diffuser Pump Due to a Rotating Stall and Some Control Methods
Performance Curve Instability of a Diffuser Pump Due to a Rotating Stall and Some Control Methods
复制标题
旋转失速引起的扩压泵性能曲线不稳定性及一些控制方法
DOI：
--
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
J. Kurokawa
中科院分区：
文献类型：
--
作者：
J. Kurokawa
利用34尿（cid:631）l的单级扩压泵，研究了带叶片扩压器的低比速泵性能曲线的不稳定性。测量结果表明，性能曲线的不稳定性是由扩压叶片的旋转失速引起的，而水头曲线的急剧下降是由扩压器入口处强烈的周期性逆流引起的流速突然减速引起的。叶轮向吸力侧的位移使得不稳定性显著。随着泵的减少而稳定
SUMMARY Perforuance curve instability of a low specific speed pump with vaned-dif- fuser is studied using a single-stage diffuser pump of 34 urin(cid:631)l The measurements revealed that the performance curve instability is caused by a rotating stall in the diffuser vanes, 'and that a sharp drop of head curve is caused by a sudden deceleration of flow velocity due to strong periodic reverse flow at the diffuser inlet. The impeller displacement toward suction side makes the instability reuarkable. stable with decrease in pump