چكيده به لاتين
Due to the important advantageous of non-premixed flames such as desirable controllability and low explosion probability, reliable and accurate analysis of the flames can be highly beneficial for different industries. The main goal of this study is to develop a promising analytical model for non-adiabatic counter-flow non-premixed flames fueled by volatile biomass particles using an asymptotic method. In order to introduce a proper model for the structure and propagation of the flames, a multi-zone combustion including preheat zone, drying zone, vaporization zone, reaction zone and oxidizer zone, is considered. In this analysis, lycopodium particles and air are introduced as the volatile biomass fuel and oxidizer, respectively. Initially, dimensionalized and non-dimensionalized forms of mass and energy conservation equations are comprehensively derived for each zone taking into account a heat loss term and reliable dimensionless parameters. Afterwards, non-dimensionalized equations are solved by applying accurate boundary and jump conditions. Mathematica and Matlab software are used for solving the governing equations. Finally, variations of flame temperature, flame sheet position, fuel and oxidizer mass fractions with fuel and oxidizer Lewis numbers, mass particle concentration, particle size, equivalence ratio and heat loss effect are elaborately discussed.
