Physical mechanisms analysis of ultrasonic high amplitude cleaning

Abstract

Abstract The article discusses physical factors that have the greatest impact on the high-amplitude ultrasonic cleaning process course. It has been revealed that an increase in oscillations amplitude a piston ultrasonic transducer over 10 … 12 μm leads to qualitatively new effects formation, which make it possible to expand ultrasonic cleaning technological capabilities. Usually, dynamic effects organization during ultrasonic cleaning is associated with cavitation bubbles action capable collapsing with local shock waves formation, pressure of which reaches 1000 atmospheres, narrow cumulative liquid streams directed toward the solid surface, and new fragmentation bubbles-germ. In high-amplitude regimes, various scale hydrodynamic flows play a decisive role for cavitation effects distribution functions formation in working capacity and for occurrence in it of spatial self-organization certain manifestations. Different-scale acoustic flows effect influence on ultrasonic treatment zone erosion activity has been analyzed. Studies have revealed technological zones presence specific for this type of treatment. Ultrasonic cleaning features with direct collapsing cavitation bubbles use are given in the articles. Possibility for expanding active cavitation erosion zone with high-amplitude ultrasonic cleaning is considered. Research conducting allowed to create effective specific technologies and several technological devices, as well as introduce them at leading industrial enterprises.