含气泡液体内的声学参数研究  

Study on Acoustic Parameter in Bubble-Liquid Medium

作　　者：姚文苇[1] 鲜晓军[2,3] 

机构地区：[1]陕西学前师范学院物理与电子技术系,陕西西安710100 [2]中国电子科技集团公司第26研究所,重庆400600 [3]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《压电与声光》2014年第4期548-551,554,共5页Piezoelectrics & Acoustooptics

基　　金：陕西学前师范学院科研基金资助项目(2013KJ012);国际科技合作计划基金资助项目(2010DFR10690)

摘　　要：基于声压与质点振动速度的边界条件,在考虑粘滞阻力、表面张力的情况下,研究了含有气泡液体内声波的传播。利用球贝塞尔及汉克尔函数,对声传播的相关参数进行了理论研究,并对声波的传播速度及衰减系数进行数值求解。结果表明,声速随气泡体积分数的增大而减小,衰减系数却增大,气泡半径对其影响较小;当声波的频率较低时,气泡的存在对声波传播的速度影响较大;而频率较高时,能量更易损失。Taking about viscous resistance and surface tension, acoustic propagation in bubble-liquid medium are studied based on pressure and radial vibration velocity in bubble wall. By using Spheric Bessel and Hankel function, the acoustic parameters are investigated; the numerical results of acoustic velocity and coefficient of attenuation are obtained. The results show that acoustic velocity will decrease and coefficient of attenuation increase following the changes of bubble volume fraction. The influence of bubble on acoustic velocity is obvious in the condition of low fre- quency; but energy loss is obvious in the condition of high frequency.

关 键 词：声传播 声压 声速 衰减系数 气泡 

分 类 号：TN912.16[电子电信—通信与信息系统] TB525[电子电信—信息与通信工程]