Experimental and Theoretical Study of Combustion of a Coal Dust Particle-Air Mixture in a Closed Spherical Volume

Experimental data are presented on pressure variation rate during the combustion of a coal dust particle-air mixture in a closed spherical volume at various mass concentrations of coal dust. A physical-mathematical model of the combustion of a coal dust particle-air mixture in a closed spherical volume is formulated on the basis of equations of mechanics of dispersed media in a one-velocity one-temperature approximation. The combustion wave propagation velocity relative to a gas suspension and the burning rate of a coal dust particle are model parameters determined by matching computational results with experimental data. There is good agreement between them. The proposed approach can be used to assess the effect of coal dust combustion on shock wave intensity in coal mines during accidental methane explosions involving coal dust.

Automated summary

This study presents experimental data and a physical-mathematical model to investigate the pressure variation rate during the combustion of a coal dust particle-air mixture in a closed spherical volume. The model parameters, including combustion wave propagation velocity and burning rate, are determined by matching computational results with experimental data. The proposed approach can be used to assess the impact of coal dust combustion on shock wave intensity in coal mine methane explosions.