Generation of High-Dispersed Liquid-Drop Systems in the High-Intensity Ultrasonic Fields

The paper is devoted to theoretical studies of process of two-stage high-dispersed dispersing of liquids. The process includes primary formation of large drops by ultrasonic influence on thin liquid film and second breakup of obtained drop under high frequency acoustic field influence in dispersed medium. The physical mechanism and physical and mathematical model of secondary drop breakup under high frequency acoustic field in dispersed medium were proposed. The model allowed to determine threshold oscillations energy at different drop sizes, properties of dispersed liquid and influence types. It is derived, that most effective method of acoustic influence is radiation of different frequency pulses at high concentration of dispersed phase (more 10 % vol.) providing conditions of intermodal dispersion. The paper shows that continuous one-frequency oscillations the radiator power can be more than 40 kW. The pulsed influence reduces the required radiator (with radiation surface area 800 cm2) power to 2 kW.