Volume 96,   №3

ON THE VELOCITY OF PROPAGATION OF A FLAME IN A COAL–METHANE–AIR SUSPENSION



A numerical investigation of the velocity of propagation of a fl ame in the coal dust suspended in a poor methane–air mixture has been performed with the use of the two-velocity model of a two-phase reactive disperse gas medium. It is shown that the presence of a small amount of methane in the air in which a coal dust is suspended increases the velocity of propagation of a fl ame in the air suspension. An increase in the size of the coal-dust particles suspended in a poor methane–air mixture ambiguously infl uences the velocity of propagation of a fl ame in it: the velocity of a fl ame in a methane–air mixture containing a small amount of coal particles decreases and the velocity of a fl ame in such a mixture with a large amount of coal particles increases with increase in their size concentration. The ranges of application of the model of combustion of a coal–methane–air mixture, developed, were determined
 
 
Author:  gas suspension, coal dust, methane–air mixture, combustion, numerical simulation
Keywords:  K. M. Moiseeva, A. Yu. Krainov, D. A. Krainov
Page:  678

gas suspension, coal dust, methane–air mixture, combustion, numerical simulation.  ON THE VELOCITY OF PROPAGATION OF A FLAME IN A COAL–METHANE–AIR SUSPENSION //Journal of engineering physics and thermophysics. . Volume 96, №3. P. 678 .


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