Measurements of Rotating Stall Inside a Centrifugal Pump Impeller
Measurements of Rotating Stall Inside a Centrifugal Pump Impeller
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DOI：
10.1115/fedsm2005-77313
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
David A Johnson;N. Pedersen;C. Jacobsen
中科院分区：
文献类型：
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作者：
David A Johnson;N. Pedersen;C. Jacobsen
对蜗壳式离心泵进行了速度测量。用激光多普勒测速仪（LDV）对带冠叶轮的叶片通道和蜗壳区域进行了测量。通过在蜗壳周向安装压力传感器获得了补充测量结果。通过叶轮的流量是在设计负载和几个非设计条件下测量的，包括严重的非设计条件。结果表明，在设计条件下的流动行为Qd表现良好。在非设计流量减小条件下（0.25Qd），测得的流型发生了显著变化，显示出交替的稳定静止失速和非失速通道。从LDV探头和压力探头的数据的频谱分析表明，在频谱的失速现象发生显着的变化。这一结果与先前的研究人员所报道的部分失速流道或旋转失速条件形成对比，在旋转失速条件下，失速模式相对于叶轮以规则的频率旋转。
Velocity measurements have been obtained in a centrifugal pump with a volute. The measurements have been obtained between the blade passages of a shrouded impeller and in the volute region using laser Doppler velocimetry (LDV). Complimentary measurements have been obtained with pressure transducers circumferentially mounted on the volute. The flow through the impeller is measured at both design load and at several off-design conditions including severe off-design conditions. Results show that flow behaviour at design conditions Qd is well behaved. At reduced flow off-design conditions (0.25Qd ) the measured flow pattern was altered significantly showing alternating stable stationary stalled and unstalled passages. Spectral analysis of the data from the LDV probe and the pressure probes showed a marked change in the spectrum as the stall phenomena occurs. This result is in contrast with previous researchers who have reported partially stalled flow passages or rotating stall conditions where the stall pattern rotated relative to the impeller with a regular frequency.Copyright © 2005 by ASME