Based on the observation and analysis of flow visualization the mechanis of the vortex street has been recognized to be a flow instability probler.
本文根据水洞观察的结果，分析了圆柱体尾流中，卡门涡街形成的原因是由于流动的不稳定性所产生。
2
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。
3
The forming and maintaining of K-H instability was an important reason of causing vortex on the shear line maintain, strengthen, and causing rainstorm.