Modeling of Spherical Flame Propagation of Cloud Organic Particles Considering Pyrolysis Term

In this paper, a comprehensive analytical method is developed to model of premixed spherical flame propagation of cloud organic particles (lycopodium) considering pyrolysis term (char), including fuel particles vaporize and char particles from pyrolysis smoothly distributed. For this purpose, the structure of flame contains a Preheat zone, flame reaction zone over of radius of flame and combustion zone. The governing equations written in each zone become dimensionless and in the end, simplified differential equations for predicting the burning velocity, flame propagation speed and flame temperature has been reached. Analytical solution is the asymptotic limit and measure of the equivalent ratio ( ≥ 1 based on available fuel in the fuel particles) is considered. As a result, with the increase available equivalence ratio in reaction flow and in fixed radius of particles, the flame temperature and burning velocity and flame propagation speed is increased. In addition, with taking this pyrolysis term, burning velocity and flame temperature will be shifted to higher values

کلیدواژه ها:

Analytical Method ، Burning Velocity ، Cloud Particles ، Pyrolysis ، Spherical Flame