随着腔内平板长度的增加，剪切层振荡的程度有所减小。
The oscillation of the shear layer decreases with the increase of the plate length.
本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。
The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range.
因而引起振荡模式的变化，腔的失稳，激光输出功率变化的复杂化。
As a result, it induces oscillating mode change, laser cavity unstable, and the complicated change of laser output power.
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