FOCUSING OF HIGH POWER ULTRASOUND BEAMS AND LIMITING VALUES OF SHOCK WAVE PARAMETERS.
FOCUSING OF HIGH POWER ULTRASOUND BEAMS AND LIMITING VALUES OF SHOCK WAVE PARAMETERS.
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DOI：
10.1134/s1063771009040034
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发表时间：
2009-07-21
影响因子：
0.8
通讯作者：
Crum LA
中科院分区：
文献类型：
--
作者：
Bessonova OV;Khokhlova VA;Bailey MR;Canney MS;Crum LA
在这项工作中，非线性和衍射效应对聚焦超声系统的放大因子的影响进行了研究。研究了高功率超声聚焦获得声场参数的极限值。数值建模采用Khokhlov-Zabolotskaya-Kuznetsov（KZK）方程。在弱耗散介质中，得到了对应于声束聚焦区激波形成前和激波形成后条件的输出水平下的非线性声场解。数值解与实验数据以及与已知的分析预测进行了比较。
In this work, the influence of nonlinear and diffraction effects on amplification factors of focused ultrasound systems is investigated. The limiting values of acoustic field parameters obtained by focusing of high power ultrasound are studied. The Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation was used for the numerical modeling. Solutions for the nonlinear acoustic field were obtained at output levels corresponding to both pre- and post- shock formation conditions in the focal area of the beam in a weakly dissipative medium. Numerical solutions were compared with experimental data as well as with known analytic predictions.