Modeling of the flame propagation in coal-dust- methane air mixture in an enclosed sphere volume.

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Yu Krainov, A.^1 ; Moiseeva, K.M.^1

Tomsk State University, Tomsk

634050, Russia^1

关键词: Coal particle size;    Conversation equations;    Flame propagation;    Flame-front propagation;    Mass conversation;    Methane-air mixture;    Particle surface;    System of equations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/5/052003/pdf
DOI  :  10.1088/1742-6596/754/5/052003

来源: IOP

【 摘 要 】

The results of the numerical simulation of the flame front propagation in coal-dust- methane-air mixture in an enclosed volume with the ignition source in the center of the volume are presented. The mathematical model is based on a dual-velocity two-phase model of the reacting gas-dispersion medium. The system of equations includes the mass-conversation equation, the impulse-conversation equation, the total energy-conversation equation of the gas and particles taking into account the thermal conductivity and chemical reactions in the gas and on the particle surface, mass-conversation equation of the mixture gas components considering the diffusion and the burn-out and the particle burn-out equation. The influence of the coal particle mass on the pressure in the volume after the mixture burn out and on the burn-out time has been investigated. It has been shown that the burning rate of the coal-dust methane air mixtures depends on the coal particle size.