, Volume 23, Issue 9, pp 2417-2423
Date: 13 Sep 2009

Novel analytical model for predicting the combustion characteristics of premixed flame propagation in lycopodium dust particles

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Abstract

This paper presents the effects of the temperature difference between gas and particle, different Lewis numbers, and heat loss from the walls in the structure of premixed flames propagation in a combustible system containing uniformly distributed volatile fuel particles in an oxidizing gas mixture. It is assumed that the fuel particles vaporize first to yield a gaseous fuel, which is oxidized in a gas phase. The analysis is performed in the asymptotic limit, where the value of the characteristic Zeldovich number is large. The structure of the flame is composed of a preheat zone, reaction zone, and convection zone. The governing equations and required boundary conditions are applied in each zone, and an analytical method is used for solving these equations. The obtained results illustrate the effects of the above parameters on the variations of the dimensionless temperature, particle mass friction, flame temperature, and burning velocity for gas and particle.

This paper was recommended for publication in revised form by Associate Editor Dongshin Shin
M. Bidabadi received his B.S degree in Mechanical Engineering from the Iran University of Science and Technology, and the M.S and Ph.D degrees from the University of Sharif, Iran and McGill University, Canada respectively. He has been a Faculty Member at Iran University of Science and Technology. His Ph.D research involved an experimental and analytical study of laminar dust flame propagation. He’s core research interests are dust flame propagation mechanisms, development of a new experimental apparatus to produce laminar, and optimization of the smoke wind tunnel. These interests have led to publish several research papers in the dust combustion. His recent study includes combustion, wind tunnel and gas dynamics.
A. Rahbari received his B.S degree in Mechanical Engineering from the Azad University in Sep. 2005, and the M.S degrees in Mechanical Engineering from the Sharif University of Technology in Sep. 2007. Now, He is a PhD candidate in Mechanical Engineering in Iran University of Science and Technology. His Ph.D research involved the analytical study of laminar dust flame propagation. His research focuses on the dust combustion, HCCI Engine, micro-combustors, heat transfer and boundary layer transition. These interests have led to publish several research papers in the mentioned subjects.