Flow measurement in helical inducer and estimate of fluctuating blade force in cavitation surge phenomena
Flow measurement in helical inducer and estimate of fluctuating blade force in cavitation surge phenomena
复制标题
螺旋诱导轮中的流量测量和空化喘振现象中脉动叶片力的估计
DOI：
10.1299/kikaib.67.2420
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Watanabe
中科院分区：
文献类型：
--
作者：
A. Furukawa;K. Ishizaka;S. Watanabe
附加诱导体是提高涡轮泵空化性能的有效方法。本文重点研究了部分流量下，在较大的吸力压力下发生的空化喘振现象。采用锁相采样的全头偏航仪，在轴向旋转或空化振荡的一个周期内，对固体度为2.0、叶尖角为11°的平板螺旋诱导器进出口段进行了流量测量。通过观察空化现象，阐明了振荡过程中流动分布的时间变化。将这些结果与振动前后条件下的结果进行比较，从这些条件下测量的机匣壁压力的叶片到叶片的分布估计出叶片力的波动。
An attachment of inducer is a powerful method to improve the cavitation performance of a turbo-pump. Cavitation surge phenomena, occurring under the severe suction pressure at a partial flow rate, is focused in the present paper. Flow measurements were carried out at the inlet and outlet sections of a flat-plate helical inducer with the solidity of 2.0 and tip blade angle of 11° by using a total-head yaw-meter with a phase locked sampling method in one period of the shaft rotation or the cavitation oscillation. Time variation of the flow distributions during the oscillation is clarified with observed cavitation behaviors. After these results are compared with those in conditions just before and after the oscillations, the fluctuating blade forces are estimated from the blade to blade distributions of casing wall pressures measured in these conditions.