An Analytical Model for Flame Propagation through Moist Lycopodium Particles with Non-unity Lewis Number

In this investigation, the structure of one-dimensional flame propagation in uniform cloud of volatile organic particles has been analyzed in which the structure of flame is divided into three zones. The firstzone is preheat zone which is divided into three subzones itself. In the first subzone (heating), particlecloud is heated until the moist particles reach to vaporization temperature (water vapor). In the next subzone (drying), particle moisture comes out, and in the final subzone the pyrolysis phenomenon takes place. The second zone is the reaction zone, and the last one is the post-flame zone. In thisresearch, an analytical method is used in order to solve the governing equations of particle cloud combustion in aforementioned zones. The overall investigation of this study leads to a non-linear burning velocity correlation. Consequently, the results show that a decrease in particle moisturecontent or an increase in equivalence ratio (j u ) or Lewis number causes to increase in moisture evaporation and devolatization rates, and consequently both flame temperature and burning velocity increase

Keywords:

Analytical Model , Lycopodium particle , Moisture content , Lewis number , Flame Temperature , Burning Velocity