开口与空腔流激声共振及声辐射研究综述

水下航行体表面边界层流经腔口时,剪切振荡与空腔声模态耦合共振产生的线谱噪声是流激噪声的一种主要机理。文章针对腔口剪切振荡及其与空腔声场耦合共振和声辐射的机理及基本特征,归纳梳理了国内外的研究现状,概述了空腔及腔口流动和声辐射控制的主要途径和方法,并提出了流激空腔噪声研究的主要问题。

A review of acoustic resonant and radiation of aperture and cavity by flow excitation

As the turbulent boundary layer passing though the opening on the surface of underwater vehi-cle, it is considered as the dominant mechanism of the line spectrum noise of flow excitation, in which the flow induced coupling resonance of shear layer oscillation with acoustic mode of cavity occurs. In this paper, the latest study on the mechanism and basic characteristics of the coupling resonance between shear layer oscillation and acoustic mode of cavity, as well as acoustic radiation of cavity is summarized. On these ground, the control methods of flow and acoustic radiation for cavity and aperture are briefly reviewed, and the main unsolved question of cavity noise induced by flow is also put forward.