Combustion and Detonation Waves in Gas Mixtures of CH4/Air, CH4/O2, O2 with Bituminous Coal Dust
A. V. Pinaev, P. A. Pinaev
Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: methane, coal dust, mine explosions, combustion, detonation, explosion hazard
Abstract
The combustion, explosion, and detonation in hybrid systems containing gas mixtures of CH4/Air, CH4/O2, and O2 with bituminous coal particles up to 200 μm in size with an average volume density of up to 700 g/m3 were studied on a vertical shock tube. X-ray diffraction patterns of the initial coal powder and coal samples subjected to high-temperature waves were analyzed. Data were obtained on the structure and parameters of waves in hybrid mixtures and in the same gas mixtures without coal dust. It is shown that in hybrid systems, coal dust has a weaker effect on the parameters of combustion and detonation waves than methane and methane in these waves is more reactive than coal dust.
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