水下对转桨无空化噪声调制理论分析与试验研究  

Theoretically analysis and experimental research on non-cavitation noise modulation mechanism of underwater counter-rotation propeller

作　　者：曾赛[1] 杜选民[1] 范威[1] ZENG Sai DU Xuanmin FAN Wei(Science and Technology on Underwater Acoustic Antagonizing Laboratory,Shanghai Marine Electronic Equipment Research Institut)

机构地区：[1]上海船舶电子设备研究所水声对抗技术重点实验室,上海201108

出　　处：《声学学报》2017年第6期641-651,共11页Acta Acustica

基　　金：国防科技重点实验室基金项目(9140C290304140C29133);青年科学基金项目(11704345)资助

摘　　要：水下对转桨无空化噪声由流场-桨叶相互作用引起,调制特性是水下对转桨无空化噪声的重要特征,本文研究了水下对转桨无空化辐射噪声调制机理。首先利用广义声类比方法得到了无空化条件下水下对转桨的远场声压谱,建立了水下对转桨无空化噪声的调制模型,然后数值仿真了模型对转桨无空化噪声的功率谱和调制谱,最后在空泡水筒中进行了模型对转桨的无空化噪声测量试验,数值仿真结果和试验验证了调制模型的准确性。该模型对于水下对转桨无空化噪声调制特性预报及目标识别具有重要价值.The underwater counter-rotation propeller non-cavitation noise has an obvious modulation characteristic which is due to the interaction of flow and blade. A modulation mechanism is presented in this paper. A sound pressure spectrum model is presented to describe its non-cavitation noise with application of generalized acoustic analogy method,the modulation mechanism is expressed with the improvement of sound pressure model. The power spectrum and modulation spectrum are presented by numerical simulation. Theoretically analysis and numerical simulation results are verified by the cavitation tunnel experiment. The modulation model of counter-rotation propeller is beneficial to the prediction modulation characteristics and identification of underwater high-speed vehicles.

关 键 词：无空化 噪声调制 调制特性 空化噪声 数值仿真 调制深度 噪声测量 制谱 理论分析 目标识别 

分 类 号：TB56[交通运输工程—水声工程]