An Analytical Model for Flame Propagation through Moist Lycopodium Particles with Non-unity Lewis Number
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-27-5_008
تاریخ نمایه سازی: 17 خرداد 1393
Abstract:
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
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Authors
m Bidabadi
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
s.a Mostafavi
Department of Mechanical Engineering, Faculty of Engineering, Arak University, Iran
f Faraji Dizaji
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
h Beidaghy Dizaji
Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran