Dynamic Behavior of an Iron Particle in (Iron-Air) DustSuspension Crossing the Flame Zones of Combustion

At present study dynamics of fuel particles according to a particle free body diagram in combustion chamber crossing the flame zones, have been studied. Gravity forces, drag force from gas and thermopherotic force are these forces on a fuel particle in combustion chamber. By existing of these forces on a particle, acceleration will be inducted to a particle in flame zones. By solving the differential equation which derived from the dynamic analysis of a fuel particle with continues boundary condition in velocity curve of the fuel dusts versus the distance from the flame, it has been estimated across the flame propagation. Considering the mass continues law in combustion chamber, concentration profile of fuel dusts has been derived across the flame zones. Theoretical estimations of velocity and concentration profiles in this study have been compared to an experimental study on velocity and concentration profiles of iron particles (diameters are distributed from 1μm to 5µm and concentration is1.05kg /m3 ) across the upward flame propagation through the particles cloud in (Iron-Air) suspension.

Keywords:

Fuel Particle , Velocity Profile , Concentration , Flame Zones