几种声致发光气泡在球形谐振腔中的局域化特性
Peculiarities of localization of several sonoluminescent bubbles in spherical resonators
摘要：
在玻璃壁声球谐振器中，利用外加超声源在水中产生1、2、4和6个声致发光气泡。理论研究表明，考虑到外部和内部谐振器表面上的接触介质的速度和压力相等，可以以良好的精度描述所观察到的激励频率。在描述多气泡局域化的特征时，指出了考虑角动量算符非零自值振荡的必要性。为了解释在两个气泡声致发光的情况下气泡之间的奇怪的小距离，已经提出了以下可能的解释：a）具有奇异角动量的模式的空间分裂的机制和b）当一个气泡被捕获到由高频振动产生的声陷阱中时的二次激发的机制，当另一个气泡声致发光发生时同时产生。
英文摘要：
Experiments on generation of 1, 2, 4, and 6 sonoluminescent bubbles in water with an external ultrasound source in an acoustic sphere resonator with glass walls have been carried out. Theoretical examination has shown that the observed excitation frequencies could be described with a good accuracy taking into account that the velocities and pressures of the contacting media on the external and internal resonator surfaces are equal. The necessity of accounting for oscillations with non--zero self--values of angular momentum operator has been shown when describing the features of localization of several bubbles. To explain a strangely small distance between the bubbles in the case of two--bubble sonoluminescence the following possible explanations have been proposed: a) mechanism of space splitting of a mode with a singular angular momentum and b) mechanism of secondary excitation when one of the bubbles is trapped into the acoustic trap created by high--frequency vibrations arising simultaneously when the other bubble sonoluminescence occurs.
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