سال انتشار: ۱۳۹۱

محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک

تعداد صفحات: ۴

نویسنده(ها):

Mehdi Bidabadi – School of Mechanical Engineering Department of Energy Conversion, Iran University of Science and Technology
Farzad Faraji Dizaji – School of Mechanical Engineering Department of Energy Conversion, Iran University of Science and Technology
Hossein Beidaghy Dizaji – School of Mechanical Engineering Department of Aerospace Engineering, Iran University of Science and Technology, Combustion Research Laboratory
Moslem Safari Ghahsareh – School of Mechanical Engineering Department of Energy Conversion, Iran University of Science and Technology

چکیده:

In order to develop application of Stirling engines which is using micro-scale biomass particle, it is essential to study combustion of organic particles. In this article, we study flame instability to calculate effect of various prominent parameters on initiation of instability in organic dust combustion. Effective parameters on initiation of instability, which are investigated in this article, are moisture content, Damköhler number, Lewisnumber and Zeldovich number. To calculate effect of these parameters, a one dimensional model is used. The flame structure is divided into three zones: preheat zone, reaction zone and post-flame zone. Governing equations are also rewritten in dimensionless space-time (z ,h ,t ) coordinates, conseq-uently a new set of equations are appeared. By solving these newly achieved governing equations and combining them, a new expression, dispersion equation, is obtained. By solving this equation it is possible to predict effect of different parameters on initiation of instability in organic dust flame.