空腔可压缩流致噪声问题研究进展

空腔是一种常见的飞行器结构，高速来流条件下，空腔流致噪声成为重要噪声源，制约飞行器性能的提高。针对空腔可压缩流致噪声问题的研究进展进行综述，分析空腔流激振荡及其诱导噪声的产生机制、参数影响规律与噪声控制技术发展趋势。基于空腔非定常流动及其诱导噪声特性，总结空腔可压缩流致噪声产生、传播规律以及相关研究方法，从来流参数、空腔形态、结构振动等关键参数出发，阐述空腔可压缩流致噪声的参数影响规律，总结空腔噪声控制技术的研究现状以及存在不足。最后，对空腔可压缩流致噪声问题研究面临的挑战和发展趋势进行展望。

Progress of research on noise induced by compressible flow over cavities

The cavity is commonly employed in designing an aircraft. Nevertheless, the cavity flow, especially under high-speed conditions, is usually an important noise source, restricting the performance of the aircraft. The research progress on the cavity noise is summarized, including characteristics of the cavity oscillation, generation of the aeroacoustic noise, parameters which influence the cavity flow, and control of the cavity noise. The generation and propagation of the noise induced by the compressible flow over cavities are analyzed based on the characteristics of the unsteady cavity flow. Parameters that determine the cavity flow and noise are classified according to flow conditions, cavity geometry and structural vibrations. Furthermore, effects of these parameters on the cavity noise are considered, and the passive and active control techniques are summarized. Finally, challenges and future directions of researches on the cavity noise are outlined.