华中科技大学学报（自然科学版）2024，Vol.52Issue(10)：78-84,7.DOI:10.13245/j.hust.240921
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
摘要
Abstract
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Key words
acoustic signal/vertical vortex/amplitude calculation/ray acoustics/numerical simulation分类
通用工业技术引用本文复制引用
王献忠,罗传增,喻敏,胡丽..通过稳态涡流场的声信号数值模拟与分析[J].华中科技大学学报（自然科学版）,2024,52(10):78-84,7.基金项目
国家自然科学基金资助项目(52271349). （52271349）
