Oscillational instabilities in single-mode acoustic levitators
Oscillational instabilities in single-mode acoustic levitators
复制标题
单模声悬浮器的振荡不稳定性
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
M. Barmatz
中科院分区：
文献类型：
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作者：
J. Rudnick;M. Barmatz
对单模谐振室中物体上的声学力的标准结果进行扩展，可以预测当物体悬浮或定位在这些腔室中时振荡不稳定性的发生。结果与实验研究一致。本方法考虑了时间延迟对空腔对其内部物体运动的响应的影响。研究了不稳定性的定量特征。讨论了样品稳定性、样品振荡饱和、滞后效应和悬浮能力丧失所需的实验条件。
An extension of standard results for the acoustic force on an object in a single‐mode resonant chamber yields predictions for the onset of oscillational instabilities when objects are levitated or positioned in these chambers. The results are consistent with experimental investigations. The present approach accounts for the effect of time delays on the response of a cavity to the motion of an object inside it. Quantitative features of the instabilities are investigated. The experimental conditions required for sample stability, saturation of sample oscillations, hysteretic effects, and the loss of the ability to levitate are discussed.