Abstract
A model describing turbulent coal dust flame propagation and accelaration is based on the transient, macroscopic equations of change. The turbulent flame velocity was obtained from a simple correlative technique combining turbulence and chemical effects. Predictions indicate that a deflegrating coal dust flame can accelerate to high velocity and pressure, with increasing turbulence a major cause of the acceleration. A parametric study was conducted to identify key parameters in the model. The need for turbulent flame velocity data for particle-laden systems was identified and the effects of duct diameter, coal particle diameter, and various model parameters were described. The model is useful for describing relative effects of various parameters.
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