A NUMERICAL STUDY ON THE COMBUSTION OF A SINGLE CARBON PARTICLE ENTRAINED IN A STEADY FLOW

The two-dimensional, unsteady, laminar conservation equations for mass , momentum, energy, and gas-phase species transport are solved numeric ally in spherical coordinates. The particle mass, momentum, and energy equations are also solved simultaneously with the gas-phase equations in order to study the effects of particle entrainment on heat and mas s transfer, and combustion around a single spherical carbon particle. The numerical solution for the case of single particle combustion give s the particle temperature and diameter variation as well as the gas-p hase velocity, temperature and species concentrations as a function of time. The results with particle entrainment are compared with those w ithout particle entrainment and in a quiescent environment. The effect s of particle size, preexponetial factor, initial relative velocity, a nd free-stream oxygen concentration on the combustion of a single part icle are also explored.