Numerical Simulation of Kerosene Combustion in Porous Media

This paper presents a numerical simulation of liquid fuel droplets combustion suspended in air in porous media. Solving the equations of conservation of energy and chemical components numerically، combustion in a porous medium is modeled. Fuel droplets vaporize and mix thoroughly in the preheating zone filled with air and then enter the combustion zone. Singlestage and five-stage combustion mechanisms were used for calculating the rate of change in the concentration of chemical constituents. For modeling of radiation heat flux of porous medium corresponding differential equations are used. Thermodynamic properties are obtained from the curves suggested in references. In this numerical model the effects of the absorption coefficient on temperature distribution، radiant flux and mass fraction of numerical components، droplet size، and the amount of pollutant are shown. The results indicate that in the porous medium with low absorption coefficient، the radiation flux is increased and thus can be used for larger diameter of the fuel droplets. As a consequence of using porous media with low absorption coefficient، the small size fuel droplets are produced more easily.