Laboratory of Chemical Reactor Engineering, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands.
Ultrason Sonochem. 2013 Jan;20(1):1-11. doi: 10.1016/j.ultsonch.2012.04.013. Epub 2012 May 24.
The physics and chemistry of nonlinearly oscillating acoustic cavitation bubbles are strongly influenced by the dissolved gas in the surrounding liquid. Changing the gas alters among others the luminescence spectrum, and the radical production of the collapsing bubbles. An overview of experiments with various gas types and concentration described in literature is given and is compared to mechanisms that lead to the observed changes in luminescence spectra and radical production. The dissolved gas type changes the bubble adiabatic ratio, thermal conductivity, and the liquid surface tension, and consequently the hot spot temperature. The gas can also participate in chemical reactions, which can enhance radical production or luminescence of a cavitation bubble. With this knowledge, the gas content in cavitation can be tailored to obtain the desired output.
非线性振荡声空化泡的物理和化学性质强烈地受到周围液体中溶解气体的影响。改变气体除其他外会改变发光光谱和崩溃气泡的自由基生成。本文综述了文献中描述的各种气体类型和浓度的实验，并将其与导致观察到的发光光谱和自由基生成变化的机制进行了比较。溶解气体类型改变了气泡的绝热比、热导率和液体表面张力，从而改变了热点温度。气体也可以参与化学反应，从而增强空化气泡的自由基生成或发光。有了这些知识，就可以调整空化中的气体含量以获得所需的输出。
