SONOLUMINESCENCE AND BUBBLE DYNAMICS FOR A SINGLE, STABLE, CAVITATION BUBBLE
SONOLUMINESCENCE AND BUBBLE DYNAMICS FOR A SINGLE, STABLE, CAVITATION BUBBLE
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DOI：
10.1121/1.402855
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发表时间：
1992-06-01
影响因子：
2.4
通讯作者：
ROY, RA
中科院分区：
文献类型：
--
作者：
GAITAN, DF;CRUM, LA;ROY, RA
在声学驻波系统中观察到了单个气泡在几种甘油和水混合物中的高幅径向脉动，声压幅值为150kpa(1.5atm)，频率为21-25 kHz。声致发光(SL)是一种通常归因于空化气泡破裂过程中产生的高温的现象，它被观察到为每个声周期发生一次的短光脉冲。通过显微镜观察，可以看到这些排放是从气泡的几何中心开始的。观察到，光发射与气泡坍塌同时发生。利用激光散射技术，得到了实验的半径-时间曲线，证实了表面波的存在，预计在100kPa以上的压力幅度下不存在表面波。[S.Horsburgh，密西西比大学博士论文(1990)]。还根据这些半径-时间曲线，测量了脉动幅度、主要气泡破裂的时间和反弹次数，并与几种理论进行了比较。讨论了这项研究对当前对空化相关现象的理解的意义，如整流扩散、表面波激发和声致发光。
High-amplitude radial pulsations of a single gas bubble in several glycerine and water mixtures have been observed in an acoustic stationary wave system at acoustic pressure amplitudes on the order of 150 kPa (1.5 atm) at 21-25 kHz. Sonoluminescence (SL), a phenomenon generally attributed to the high temperatures generated during the collapse of cavitation bubbles, was observed as short light pulses occurring once every acoustic period. These emissions can be seen to originate at the geometric center of the bubble when observed through a microscope. It was observed that the light emissions occurred simultaneously with the bubble collapse. Using a laser scattering technique, experimental radius-time curves have been obtained which confirm the absence of surface waves, which are expected at pressure amplitudes above 100 kPa. [S. Horsburgh, Ph.D. dissertation, University of Mississippi (1990)]. Also from these radius-time curves, measurements of the pulsation amplitude, the timing of the major bubble collapse, and the number of rebounds were made and compared with several theories. The implications of this research on the current understanding of cavitation related phenomena such as rectified diffusion, surface wave excitation, and sonoluminescence are discussed.