The method of dual-frequency influence on gaseous media to increase the efficiency of coagulation.

The article is devoted to the development of a new method of dual-frequency ultrasonic influence on a gas-dispersed flow using an ultrasonic tubular emitter. In this case, the emitter oscillates on two neighboring vibration modes, one of which generates diametrical vibrations of the entire radiator with an average sound pressure level of more than 180 dB, and the neighboring second mode generates flexural-diametric vibrations with an average sound pressure level of more than 160 dB. Diametral oscillations form an ultrasonic standing wave with predominantly cylindrical nodal zones into which particles are transferred. A change in the operating mode of oscillations leads to the formation of a standing wave, with additional transverse nodal regions into which particles are moved. Along with this, vortex flows are formed, which also increase the efficiency of interaction between particles. A periodic change in the oscillation mode leads to a change in the shape of the nodal regions, which in turn leads to the possibility of controlling the position of particles inside the radiator and the formation of zones of increased concentration, in which a significant increase in the efficiency of particle coagulation occurs. [ABSTRACT FROM AUTHOR]