This article is cited in 15 papers

Combustion and detonation waves in gas mixtures of $\mathrm{CH}_4/\mathrm{Air}$, $\mathrm{CH}_4/\mathrm{O}_2$, $\mathrm{O}_2$ with bituminous coal dust

A. V. Pinaev, P. A. Pinaev

Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russia

Abstract: The combustion, explosion, and detonation in hybrid systems containing gas mixtures of $\mathrm{CH}_4/\mathrm{Air}$, $\mathrm{CH}_4/\mathrm{O}_2$, and $\mathrm{O}_2$ with bituminous coal particles up to 200 $\mu$m in size with an average volume density of up to 700 g/m$^3$ 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.

Keywords: methane, coal dust, mine explosions, combustion, detonation, explosion hazard.

UDC: 534.222.2+536.46+622.814

Received: 18.12.2019
Revised: 21.02.2020
Accepted: 01.06.2020

DOI: 10.15372/FGV20200606

 English version: Combustion, Explosion and Shock Waves, 2020, 56:6, 670–681

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