The result shows that the boundary layer radial vortex becomes an important factor for causing compressor flow instability.
结果表明，附面层径向涡是该压气机转子流动失稳的一个很重要的原因。
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.
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；
Before the vortex breakdown, the aeroelastic instability presents itself as just a simple flutter.
涡破裂前，气动弹性失稳表现为单纯的颤振问题。
Before the vortex breakdown, the aeroelastic instability presents itself as just a simple flutter.
涡破裂前，气动弹性失稳表现为单纯的颤振问题。
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