Abstract

The results of studies into the coagulation process of submicron particles (smaller than 1–2.5 μm) under various conditions of ultrasonic exposure are presented to identify the possibility of increasing the efficiency of coagulation. An analysis of the peculiarities of the coagulation process both with a sinusoidal effect and with shock-wave (pulsed) action has made it possible to establish that the shock-wave action provides a coagulation rate of submicron particles that is up to 20 times higher when compared with the sinusoidal effect at the same total energy of exposure. It is shown that the cause of the acceleration of the process is nonlinear effects arising from shock-wave action and affecting the coagulation rate of particles (a change in the cross-sectional area of collision, local medium compaction, and mutual diffusion of the gas surrounding the particle during the transitional flow regime between the free and continuous molecules).

中文翻译：

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在超声作用下提高亚微米颗粒的凝结效率

摘要

提出了在各种超声暴露条件下对亚微米颗粒（小于1–2.5μm）进行凝结过程的研究结果，以确定提高凝结效率的可能性。对具有正弦波效应和冲击波（脉冲）作用的混凝过程的特殊性进行分析，可以确定，冲击波作用提供的亚微米颗粒的凝结速率最高可达到20倍。在相同的总暴露能量下与正弦效应相比。结果表明，该过程加速的原因是由冲击波作用引起的非线性影响，并且影响了颗粒的凝结率（碰撞截面积的变化，局部介质的压实，