摘要
实验表明，在不稳定的涡流场中，外部声激励将会对内部流场中的不稳定涡流产生影响，形成声涡相互耦合的感应性，声控的效果依赖于激励声波的大小和频率。本文从流体力学普遍方程出发，建立在单频声激励下，声场和流场相互耦合的理论模式。利用摄动方法，讨论了声涡相互耦合的感应性，从理论上论证了声激励存在声涡共振频率。
Experiments show that external acoustic excitation has an effect on unstable turbulence of internal flows, and makes sensitivity of sound and turbulence each other, intensity and frequency of sound wave acts on effect of acoustic excitation. On basic equations of flow mechanics, this paper gives a theoretic model of sound and flow making an effect each other by a frequency acoustic excitation. By perturbation method, this paper proves that there is co vibration frequency of sound and turbulent in theory.
出处
《华东船舶工业学院学报》
EI
1999年第2期28-32,共5页
Journal of East China Shipbuilding Institute(Natural Science Edition)
基金
国家自然科学基金
关键词
分离流动
声激励
共振频率
声涡
声场
separated flow
acoustic excitation
resonant frequency
