A review of rotating stall in reversible pump turbine

A review of rotating stall in reversible pump turbine
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可逆水泵水轮机旋转失速研究进展

DOI:
10.1177/0954406216640579
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发表时间:
2017-04
期刊:
PImechEC
影响因子:
--
通讯作者:
Yulin Wu
Yulin Wu
中科院分区:
其他
文献类型:
--
作者:
Yuning Zhang;Yuning Zhang;Yulin Wu

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目前抽水蓄能电站可逆水泵水轮机运行在众所周知的s型特征区存在较大的不稳定性问题,导致系统无法启动,压力波动较大,整个系统振动剧烈。可逆泵水轮机上述失稳的物理根源之一是发电模式非设计工况下产生的旋转失速现象。本文综述了近年来关于可逆泵水轮机旋转失速的研究,重点介绍了可逆泵水轮机的发电方式。在可逆泵水轮机中,旋转失速在失控时开始,在低流量条件下得到充分发展,特征旋转频率为叶轮旋转频率的50-70%。旋转失速引起的严重影响包括产生较大的压力波动、通道堵塞和强回流,这些都是可逆泵水轮机失稳的重要原因。并通过实例介绍了旋转失速的识别方法。最后,对今后的工作提出了几点建议。
Currently, operations of reversible pump turbines in pumped hydro energy storage plant suffer great instability problems in the well-known S-shaped characteristic regions, leading to the failure of start, significant pressure fluctuations, and severe vibrations of the whole system. One of the physical origins of the above instability of reversible pump turbines is the rotating stall phenomenon generated at off-design conditions in generating mode. In this review, recent studies on the rotating stall of reversible pump turbines are critically reviewed with a focus on the generating mode. In reversible pump turbine, the rotating stall initiates at runaway and is fully developed at low discharge condition with characteristic rotating frequency being 50–70% of the impeller rotational frequency. Notorious effects induced by rotating stall include generation of large pressure fluctuation, channel blockage, and strong backflow, all of which contribute significantly to the instability of reversible pump turbine. Methods for identification of rotating stall are also introduced with plenty of examples. Finally, several suggestions on the future work are given and discussed.
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发表时间: 2011-09
影响因子: 1.7
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