Micro-organic dust combustion considering particles thermal resistance

被引:0
|
作者
Mohammadamin Soltaninejad
Farzad Faraji Dizaji
Hossein Beidaghy Dizaji
Mehdi Bidabadi
机构
[1] Iran University of Science and Technology,School of Mechanical Engineering Department of Energy Conversion, Combustion Research Laboratory
[2] The University of Vermont,School of Engineering
[3] Islamic Azad University,Young Researchers and Elite Club, Tabriz Branch
来源
Journal of Central South University | 2015年 / 22卷
关键词
micro-organic dust; Biot number; particles thermal resistance; flame temperature; burning velocity;
D O I
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中图分类号
学科分类号
摘要
Organic dust flames deal with a field of science in which many complicated phenomena like pyrolysis or devolatization of solid particles and combustion of volatile particles take place. One-dimensional flame propagation in cloud of fuel mixture is analyzed in which flame structure is divided into three zones. The first zone is preheat zone in which rate of the chemical reaction is small and transfer phenomena play significant role in temperature and mass distributions. In this model, it is assumed that particles pyrolyze first to yield a gaseous fuel mixture. The second zone is reaction zone where convection and vaporization rates of the particles are small. The third zone is convection zone where diffusive terms are negligible in comparison of other terms. Non-zero Biot number is used in order to study effect of particles thermal resistance on flame characteristics. Also, effect of particle size on combustion of micro organic dust is investigated. According to obtained results, it is understood that both flame temperature and burning velocity decrease with rise in the Biot number and particle size.
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页码:2833 / 2840
页数:7
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