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Indexed by:期刊论文

Date of Publication:2017-11-01

Journal:SAINS MALAYSIANA

Included Journals:SCIE

Volume:46

Issue:11,SI

Page Number:2143-2148

ISSN No.:0126-6039

Key Words:Coal self-heating; flow field; pore scale; self-heating point; temperature field

Abstract:The air supply velocity is an important factor affecting the spontaneous combustion of coal. The appropriate air velocity can not only provide the oxygen required for the oxidation reaction, but maintains the good heat storage environment. Therefore, it is necessary to study the influence of the actual air velocity in the pore space on the self-heating process of coal particles. This paper focuses on studying the real space piled up by spherical particles. CFD simulation software is used to establish the numerical model from pore scale. Good fitness of the simulation results with the existing results verifies the feasibility of the calculation method. Later, the calculation conditions are changed to calculate and analyze the velocity field and the temperature field for self-heating of some particles (the surface of the particles is at a certain temperature) and expound the effect of different air supply velocities on gathering and dissipating the heat.