wake vorticity
... 尾涡 wake vortex 尾涡度 wake vorticity 尾随台风 wake-following typhoon ...
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此外，发现开度较小时尾水管内存在明显的涡带和回流涡结构，容易导致机组运行的不稳定；
Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine.
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