The geometric parameters of two cavities are optimally seeked out so as to make the eigenfrequency between the cavities couple each other and impel out fluid resonance.

• 虽然串联喷嘴阻力损失的增加，使射流平均能量有所降低，但射流的瞬时能量得到了调制，激励出更大的流体振荡。