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.
出处
《压电与声光》
CSCD
北大核心
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)
关键词
声传播
声压
声速
衰减系数
气泡
propagation of acoustic
acoustic pressure
acoustic velocity
coefficient of attenuation
bubble
