Characterization as measurement sound source of acoustic cavitation noise from bubble clusters under ultrasonic horn

被引：8
作者：
Kuroyama, Takanobu [1 ]
Ogasawara, Hanako [1 ]
Mori, Kazuyoshi [1 ]
机构：
[1] Natl Def Acad, Yokosuka, Kanagawa 2390811, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2023年 / 62卷 / SJ期
关键词：
acoustic cavitation noise; acoustic measurement; schlieren method; acoustic mirror; shockwave;
D O I：
10.35848/1347-4065/acb8a5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In order to investigate the possibility of using acoustic cavitation noise generated by ultrasonic horns as an acoustic measurement signal, its directional characteristics, autocorrelation characteristics, and frequency characteristics are investigated with a hydrophone and schlieren visualization. In addition, a parabolic mirror is used to shape the spherical acoustic cavitation noise into a plane wave. As a result, it is found that the acoustic cavitation noise consists of a spherical shockwave pulse train and has a frequency bandwidth of at least 10 MHz and sharp autocorrelation characteristics. Furthermore, it is also shown that a parabolic mirror can shape a spherical shockwave into a plane shockwave.
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页数：6
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