DYNAMICS AND EVAPORATION OF DROPLETS IN AN ASCENDING CONVECTIVE FLOW OF HEATED AIR

Consideration has been given to the procedure for determining the rate of evaporation of single droplets and their cluster precipitating through a high-temperature zone in a gravitational fi eld with account for a convective ascending gas fl ow. Results are presented of an experimental investigation of the rate of droplets′ evaporation in a convective fl ow: approximation dependences for temperature distribution through the heater height have been obtained for various values of its power output. A physicomathematical model has been developed for free convection inside an open cylindrical tube and gravitational precipitation of droplets in an ascending convective fl ow. An analysis has been made of the eff ects of the droplets′ size and power magnitude of the heat energy supplied to the wall on droplet temperature and mass loss.
Consideration has been given to the procedure for determining the rate of evaporation of single droplets and their cluster precipitating through a high-temperature zone in a gravitational fi eld with account for a convective ascending gas fl ow. Results are presented of an experimental investigation of the rate of droplets′ evaporation in a convective fl ow: approximation dependences for temperature distribution through the heater height have been obtained for various values of its power output. A physicomathematical model has been developed for free convection inside an open cylindrical tube and gravitational precipitation of droplets in an ascending convective fl ow. An analysis has been made of the eff ects of the droplets′ size and power magnitude of the heat energy supplied to the wall on droplet temperature and mass loss.
Author:  O. V. Matvienko, V. A. Arkhipov, V. I. Romandin, O. I. Daneiko, S. A. Basalaev, and N. N. Zolotorev
Keywords:  single droplet, cluster of droplets, gravitational sedimentation, high-temperature medium, evaporation, experimental investigation, mathematical modeling
Page:  329