| A two-dimensional model for describing local characteristics of turbulent, pulverized coal flames was completed and analyzed. The model describes local gas and particle properties in cylindrical, axi-symmetric reactors using finite difference techniques. The gas-phase combustion model is based on micro-mixing limitations, and not chemical kinetics. Mean gas properties are calculated using turbulence-based probability density considerations. Coal properties are calculated on a Lagrangian basis. Both devolatilization and char oxidation kinetics are included.; A numerical analysis of the computer model was performed, and numerical improvements were made to decrease computational time requirements. Model predictions were extensively analyzed by comparison with experimental data from both reacting and non-reacting systems. Good agreement was demonstrated for many systems, indicating possible applications for the model. Disagreements were explained, and areas for future theoretical and experimental research were suggested. |
