空化乳化机制的高速摄影实验研究

我们用高速摄影方法,对单一空化气泡的乳化过程进行了实验研究。结果表明:(1)两种基本形式的乳化均发生在空化气泡完全闭合的瞬刻,由此得出,乳化的发生是由于空化气泡完全闭合的瞬刻在液体中产生的骇波作用的结果;(2)对于A-B两液相,如在A相中产生空化,则主要形成A/B型乳化。据此,与Недужий所推想的“抽吸”模型不同。我们把空化乳化过程的物理图象归之为“挤压”模型。

EXPERIMENTAL INVESTIGATION OF THE MECHANISM OF CAVITATION EMULSIFICATION EMPLOYING HIGH-SPEED PHOTOGRAPHY

In this work results are given for the experimental investigation of the me-chanism of cavitation emulsification by means of high-speed photography. The results show that: 1) Two fundamental types of cavitation emulsification occur simultaneously at the moment of a single cavitation bubble collapse. It thus appears that: emulsifica-tion is induced by the shock waves generated in liquids at the moment of cavitation bubble collapse; 2) In contrast with the "suction" model suggested by Nedouzhii, the process of cavitation emulsification would be better described by a "crushing" model.