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Study on Radiation Acoustic Field due to Cavitation Bubble near Rigid Wall
ZHANG Peng-li;LIN Shu-yu;ZHANG Hai-juan;ZHANG Tao
2012, 32 (3):
104-107.
DOI: 10.3969/j.issn.1006-1355.2012.03.024
The radiation acoustic field due to cavitation bubbles collapse near the rigid wall was studied. And the sound pressure distribution of the radiation field due to a single bubble and double bubbles near the rigid wall was obtained. This study shows that due to the impact of rigid wall the acoustic radiation of cavitation bubbles becomes some directional. The distribution of radiation pressure by double bubbles depends on the bubbles’ collapse time, the distance between bubbles, and the initial radius of the cavitation bubbles. Considering the phase superposition of sound pressures, radiation pressure at the measurement points depends on sound pressure amplitude p of the bubbles, and the sound path difference of the two bubbles to the observation point, [Δ1=l12sinθ1] and [Δ2=l22sinθ2]. This computation process and result may provide some basis for the cavitation calculation near the rigid wall, and a theoretical basis for radiation sound field analysis of multi-bubble cavitation. It is also helpful for improvement of kinematic equations of cavitation bubbles.
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