Spatial Distribution of Acoustic Cavitation Bubbles at Different Ultrasound Frequencies

摘要: Images of sonoluminescence, sonophotoluminescence and sonochemiluminescence are recorded in order to semi-quantitatively compare the spatial distribution cavitation activity at three different ultrasound frequencies (170 kHz, 440 kHz 700 kHz) various acoustic amplitudes. At all investigated, sonochemically active zones much larger than where sonoluminescence is observed. Also, bubbles observed relatively lower amplitudes that required for appear. The power observation initial increases with an increase frequency. uniformly throughout reactor 170 whereas they located away from transducer higher used this study. While these observations highlight complexities involved cavitation, possible reasons results discussed.