FLAMES WITH SIGN-ALTERNATE SPEED IN METHANE-AIR AND METHANE-AIR-COAL SUSPENSION MIXTURES IN A VERTICAL CLOSED PIPE
A. V. Pinaev, P. A. Pinaev
Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: methane-air mixture, coal gas suspension, combustion wave, sign-variable flame speed, optical imaging of flame, flame speed pulsations
Abstract
This paper presents the results of an experimental study of flames propagating with a sign-variable speed, in methane-air and coal-methane-air mixtures in a vertically located closed pipe at coal dust concentrations of 0.10 ÷ 0.42 kg/m3. The results of the study can be useful for developing combustion models and assessing dynamic and thermal effects during combustion of methane-air suspended coal in coal mines.
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