微通道内声传播格子Boltzmann建模及其特性研究  

Modeling and characterization of sound propagation in microchannels using lattice Boltzmann method

作　　者：杨雨 余江波 苏娜娜 张新翠 单鸣雷[4] 韩庆邦[4] YANG Yu;YU Jiangbo;SU Nana;ZHANG Xincui;SHAN Minglei;HAN Qingbang(Nanjing Forestry University,Nanjing 210037,China;Jinling University of Science and Technology,Nanjing 211169,China;ZTE Communication Co.,Ltd.,Nanjing 210012,China;Hohai University,Changzhou 213022,China)

机构地区：[1]南京林业大学,南京210037 [2]金陵科技学院,南京211169 [3]中兴通讯股份有限公司,南京210012 [4]河海大学,常州213022

出　　处：《应用声学》2025年第2期312-323,共12页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(12404530)。

摘　　要：吸声材料在抑制噪声污染方面发挥重要作用,其吸声性能受到内部微通道结构影响。然而微通道尺寸小且结构复杂,有必要采用合适的数值工具来研究微通道内声传播特性。该文采用介观的格子Boltzmann方法构建了微通道内声传播模型,并引入了声学无反射边界以消除声波反射的影响。通过构建单/双层微通道声传播模型,探究了波长、通道宽度对声传播的影响及水平声压幅值的分布情况。进而通过在微通道上放置凹凸固体块模拟粗糙微通道环境,研究声波经过粗糙微通道后的变化,分析固体块的长度对声传播的影响,并将声波经过两种固体块的声压幅值差进行对比。研究结果证明格子Boltzmann方法可以有效地描述微观尺度下通道内声波的传播过程,从流体力学角度描述声场的分布,为声流固耦合相关领域的模拟计算的应用提供参考。Sound-absorbing materials play an important role in suppressing noise pollution,and their sound absorbing performance is affected by the internal micro-channel structure.However,microchannels are small and complex structures,so it is necessary to use appropriate numerical tools to study the acoustic propagation characteristics in microchannels.This paper uses the mesoscopic lattice Boltzmann method(LBM)to construct an acoustic propagation model in a microchannel.An acoustic non-reflective boundary is introduced to elimi nate the influence of acoustic wave reflection.By constructing a single-layer microchannel sound propagation model,the effects of wavelength and channel width on sound propagation and the distribution of horizon tal sound pressure were explored.Then,a rough microchannel environment was simulated by placing a concave and convex solid block on the microchannel,and the changes in sound waves after passing through the rough microchannel were studied.The effect of the length of the solid block on sound propagation was analyzed,and the sound pressure drop of the sound wave passing through the two solid blocks was compared.The research results demonstrate that LBM can effectively describe the propagation process of sound waves in the channel at the microscopic scale,describe the distribution of the sound field from the perspective of fluid mechanics,and provide a reference for the application of simulation calculations in fields related to acoustic-fluid-structure coupling.

关 键 词：格子BOLTZMANN方法 微通道 声传播 多松弛模型 

分 类 号：O426.2[理学—声学]