Abazar vahdat azad - Department of Mechanical Engineering, Faculty of Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran
mehdi bidabadiz - School of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Ira

A new analytical study performed to investigate the effect of the temperature difference between gas and particle in propagation of the spherical Haines. The combustible system is containing uniformly distributed volatile fiiel particles in an oxidizing gas (air) mixture. The model includes evaporation of volatile matter of dust particles to known gaseous fuel (methane) and the single-stage reaction of gas- phase combustion. The structure ofthe flame is composed of a preheat zone, reaction zone, and convection zone. The study is within the framework of large activation energy and quasi-steady assumptions. The validity of theoretical prediction is confirmed by data presented in other literature including buming velocity. The obtained results illustrate the effects of the above parameter on the variations ofthe flame speed, temperature, particle mass traction, flame temperature, concentration, and burning velocity for gas and particle

combustion,spherical falme,organic dust,burning velocity,particle temperature