13. ソノルミネッセンスによる超音波反応場への影響因子の考察

概要

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Sonoluminescence (SL) intensity from cavitation-bubble fields has been measured for a well-defined standing-wave sound field in a rectangular cell filled with distilled water, when ultrasonic frequency, the water height and temperature were systemically changed. Optics was designed to ensure all the sonoluminescencing positions in the cell were detectable by a PMT. The temperature was controlled by a cooling bath, in which the cell was sunk. In order to obtain an overall view of SL intensity dependence on resonance situation in cell, a 3D SL intensity-water height-ultrasonic frequency contour map was obtained. The SL intensity is strongly influenced by the modes of acoustic standing wave formed in the cell and resonance properties of transducer. Although the basic trend was confirmed that the SL intensity decreases when the temperature increases, it was found that SL intensity was further modulated by the appearance of resonance mode of standing wave during the rise of temperature. [Work supported by Japan Small Business Corporation through Creative and Fundamental R&D Program for SMEs].
日本ソノケミストリー学会の論文
1997-10-01