naa a22 4500 510762522 CHVBK 20180411083144.0 cr unu---uuuuu 180411e20131101xx s 000 0 eng 10.1134/S0040601513110116 doi (NATIONALLICENCE)springer-10.1134/S0040601513110116 The influence of the gas-distributing grid diameter on the transition velocity and hydrodynamics of the bottom layer in circulating fluidized bed installations [Elektronische Daten] [V. Tuponogov, A. Baskakov] The dependences of dimensionless fluidization velocities separating bubble, transition, and fast fluidization regimes on the properties of dispersed material for particles belonging to groups B and D (according to D. Geldart's classification) are presented. Correspondence between the considered dependences and experimental data obtained by different researchers and their correlation with critical fluidization velocities and particle terminal velocities are shown. The hydrodynamic mechanisms governing the saturation of fluidized bed with bubbles on reaching the transition fluidization velocity in installations having different sizes are considered. Factors due to which a bottom bubble layer disappears in narrow installations and is retained on large-diameter grids in an intense channel forming mode are explained. Experimental data are presented from which it is seen that the bubble layer hydrodynamics depends on the gas-distributing grid diameter and that this diameter has an insignificant influence on the fluidization velocity during the transition from a bubble to fast fluidization regime. Pleiades Publishing, Inc., 2013 fluidization regimes nationallicence transition velocities nationallicence bottom layer nationallicence bubbles nationallicence gas-distributing grid nationallicence Tuponogov V. Ural Federal University, ul. Mira 19, 620002, Yekaterinburg, Russia aut Baskakov A. Ural Federal University, ul. Mira 19, 620002, Yekaterinburg, Russia aut Thermal Engineering Springer US; http://www.springer-ny.com 60/11(2013-11-01), 808-812 0040-6015 60:11<808 2013 60 11509 https://doi.org/10.1134/S0040601513110116 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0040601513110116 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tuponogov V. Ural Federal University, ul. Mira 19, 620002, Yekaterinburg, Russia aut NATIONALLICENCE 700 1- Baskakov A. Ural Federal University, ul. Mira 19, 620002, Yekaterinburg, Russia aut NATIONALLICENCE 773 0- Thermal Engineering Springer US; http://www.springer-ny.com 60/11(2013-11-01), 808-812 0040-6015 60:11<808 2013 60 11509 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer