Aerodynamics and Heat and Mass Transfer of Fluidized Particle Beds in Vortex Chambers

Abstract

This article is devoted to the results of studying the heat and mass transfer pr“particle-gas” systems proceeding in a bed fluidized in the field of centrifugal force. It has been shown that the processes are essentially intensified under these conditions as compared to those in fluidized beds. Under fluidization in the field of centrifugal force it is possible to obtain a steady uniform vortical layer of particles, which is uniformly blown through by gas with relative velocities exceeding the velocity of the particle swirling in a carrying medium. There exists a possibility of controlling this layer and the residence time of particles This article presents the results of experimental and computational studies of aerodynamics and heat and mass transfer of vortex chambers with a fluidized bed of particles. The peculiarities of the particle bed formation depending on the bed mass, dispersed composition, aerodynamics, and geometric characteristics of vortex chambers have been analyzed. The study of the heat and mass transfer between the heat carrier flux and particles is carried out for the case of particle bed healing in the vortex chamber and the evaporation of the surface moisture from a dispersed material The problems of the use of centrifugal fluidization in different technological processes are discussed.