静态声空化泡内外的质量交换

Mass exchange on the wall of static acoustic cavitation bubble

研究表明声空化泡内外存在着不可忽略的质量交换,但目前的研究主要针对激烈脉动型的声空化泡.本文利用驻波声场的Bjerkes力稳定悬浮非激烈脉动型声空化泡(静态声空化泡)来研究泡壁处气液间的质量交换特性.结合实验结果,我们分析了驱动声压、气体种类、液体的黏度、表面张力,饱和蒸汽压等因素对静态声空化泡内外质量交换特性的影响.同时,我们设计的实验系统也为气液传质特性测量提供了一种方法.

Study shows that unegligible mass exchange does exist on the wall of acoustic cavitation bubble, but present study mainly focuses on violently pulsant acoustic cavitation bubble. We levitate nonviolently pulsant acoustic cavitation bubble （static acoustic cavitation bubble） using Bjerkes force of standing acoustic field, and study the mass exchange characteristic between liquid and gas on the bubble＇s wall. With the experiments result, we analysis the impact of acoustic pressure, gas species, liquid viscosity, liquid surface tension and liquid volatility on the mass exchange characteristic of static acoustic cavitation bubble. Furthermore, we provide a method to measure the gas-liquid mass transfer characteristic.