【作者】 张风珍； 李桂娟； 王纪会； 马福强；

【Author】 ZHANG Feng-zhen;LI Gui-juan;WANG Ji-hui;MA Fu-qiang;Science and Technology on Underwater Test and Control Laboratory;

【机构】 水下测控技术重点实验室；

【摘要】 研究和掌握水下超空泡航行体的辐射噪声特性,对于实现其水下声自导、探测、隐身等具有重要意义。本文介绍了超空泡航行体的空化形成机理,指出其空化噪声主要来源是空泡尾部闭合区空泡破碎后形成的小空泡群的溃灭。有针对性的建立了单空泡崩溃辐射噪声模型,仿真和分析了不同空泡半径、崩溃反弹指数、所处环境等参数条件下的单空泡空化噪声波形和频谱特性,并结合特定的空泡群半径分布特点,进一步仿真和分析了空泡群崩溃辐射噪声特性。仿真结果显示,超空泡航行体空化噪声是一种中频较强、低频和高频逐渐变弱的"钟形"频谱的宽带辐射噪声。更多还原

【Abstract】 The noise characteristics study of the underwater supercavitation vehicle has important significance to its underwater acoustic guiding, detecting, stealthing, etc. The cavitation theory and formation mechanism are introduced in the paper. It is point out that the collapse of the small bubbles group which come from the breakdown of the supercavitation tail is the main source of the cavitation noise. The noise model of the single bubble collapse is established, and the cavitation noise waveform and spectrum of the single bubble are simulated and analyzed under various conditions. Moreover, the bubble group noise characteristics is simulated and analyzed for a special bubbles radius distribution. The results show that the cavitation noise of the supercavitation vehicle is a kind of wideband noise including strong mid-frequency components and gradually weaken low-frequency and high-frequency components.更多还原