Some Laws Governing Twisted Two-Phase Flows in the over-Bed Space of a Fluidized Bed of Finely Divided Particles

Motion of Particles in a Gas Stream in the Presence of Tangential and Axial Blowing

“…In the experiments mentioned above [9], the zone of quasi-solid rotation of gas occupied the greater part of the vortex chamber (Fig. 2).…”

“…1. As the gas velocities U φ , U r , and U z we used the experimental distributions of these quantities obtained in [9] in a vertical cylindrical chamber of diameter 0.393 m and height 0.408 m, in which a vortex zone was located above a bubbling bed (of height 0.15 m) of crushed corn particles (d = 0.88·10 -3 m). Figure 2 presents calculated radial distributions of the particle velocities V φ , V r , and V z , as well as of the total velocity magnitude V = ,…”

“…obtained in [9] based on the analysis of experimental data on decrease in the kinetic energy of the gas in the presence of particles with d = 0.88·10 -3 m that escape into the vortex zone from the bubbling bed. As is seen, the values of the particle velocities depend substantially on their diameter, with the velocities of the fi ne particles of diameter 6·10 -6 m practically coinciding with the gas velocities.…”