A Model for Flame Propagation in Low Volatile Coal Dust-Air Mixtures

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Abstract
A model describing steady, laminar flame propagation in low volatile coal dust-air mixtures is presented. The model includes radiative transport, a two-phase energy equation, and heterogeneous carbon gasification of the coal particles. The differential approximation (or method of spherical harmonics) was used to represent the one-dimensional radiant energy transport. The equations were numerically integrated and predictions of flame structure and the adiabatic flame speed are presented. The effects of radiation properties and coal particle size are presented and discussed. The influence on the temperature profiles of heat released in the solid phase is also described.

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