通过稳态涡流场的声信号数值模拟与分析  

Numerical simulation and analysis of acoustic signal through steady eddy current field

作　　者：王献忠[1] 罗传增 喻敏[1] 胡丽 WANG Xianzhong;LUO Chuanzeng;YU Min;HU Li(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Systems Engineering Research Institute,China State Shipbuilding Corporation limited,Beijing 100094,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]中国船舶集团有限公司系统工程研究院,北京100094

出　　处：《华中科技大学学报（自然科学版）》2024年第10期78-84,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(52271349)。

摘　　要：基于射线声学理论提出一种计算移动介质中声波声压幅值的方法,实现了通过移动介质的声信号数值模拟.从声能守恒定律出发,计算相邻射线组成射线管的横截面积,进而推导出声压幅值表达式.针对Burgers涡和立轴旋涡展开研究,将数值模拟结果与文献算例和实验数据分别对比,验证了本文声信号数值模拟结果的准确性.在此基础上,分析了不同涡流场和声源条件下通过涡流场的声信号幅值比和相位差的变化规律,结果表明:通过涡流场的声信号幅值与马赫数和涡核特征半径相关,根据通过涡流场的声信号相位和幅值变化可对涡流场特征参数进行估计;在满足声波波长远小于涡核半径的情况下,通过涡流场的声信号幅值和时延变化与频率无关.A methodology was proposed based on the theory of ray acoustics to calculate sound pressure amplitude in moving media and achieve numerical simulation of sound signal propagation through such media.The cross-sectional area of a ray tube composed of neighboring rays was calculated starting from the law of conservation of acoustic energy,and the expression for the amplitude of acoustic pressure was then deduced.The accuracy of acoustic signal simulations was validated by comparing the numerical simulation results with existing literature examples and experimental data for the Burgers vortex and vertical vortex.Building on this foundation,an analysis was conducted on the amplitude ratio and phase difference of sound signals passing through eddy current fields under different conditions of both eddy current fields and sound sources.Results show that the amplitude of sound signals passing through eddy current fields is influenced by Mach number and vortex core characteristic radius,enabling estimation of characteristic parameters for eddy current fields based on observed variations in phase and amplitude during sound signal transmission.In cases where the wavelength of the acoustic wave is much smaller than the radius of the vortex core,both amplitude and time-delay changes of the sound signals passing through the vortex field are independent from frequency.

关 键 词：声信号 立轴旋涡 幅值计算 射线声学 数值模拟 

分 类 号：TB566[交通运输工程—水声工程]