欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
超卢场中气泡除径向振动外,还可能会平动并且相互影响。本文以考虑邻近气泡次级声辐射影响后的球形气泡径向振动模型为基础,结合气泡在声场中受到的力,利用数值方法研究了平面波声场中不同尺寸的两气泡径向振动和平动规律。发现尺寸较大气泡的径向振动具有一定的本征性特征且具有较大平动位移。利用高速摄影系统定性地观察了气泡运动和泡群分布状态。实验表明大气泡以较快的速度平动同时伴有小幅径向脉动。我们还观察到了气泡相互吸引聚合的现象,此类行为可归结为次级声辐射的影响。
英文摘要：
The dynamic responses of bubbles in ultrasonic field include the radial vibration,translation,and their interactions.Based on the radial vibration modal where the secondary radiation of neighboring bubbles was considered, and interaction forces of bubbles,the coupled motion of two bubbles with different size in a plane ultrasonic field was simulated numerically.The results show that the radial vibration of a big bubble has natural properties and its translation velocity is rapid relatively.The behavior and distribution of bubbles were observed experimentally by using high speed photography.It is shown that the big bubbles translate rapidly in bubble clouds and vibrate radially with small-amplitude.On the other hand,the phenomena of attraction and coalescence among bubbles are observed,which may be attributed to the effect of secondary radiation between neighboring bubbles.
同期刊论文项目
同项目期刊论文
Analysis on the resonance frequency of a radial composite piezoelectric ceramic ultrasonic transduce
Electro-mechanical equivalent circuit of a piezoelectric ceramic thin circular ring in radial vibrat
期刊信息
位置：