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首页> 外文期刊>Combustion, Explosion, and Shock Waves >Modeling Combustion of Lycopodium Particles by Considering the Temperature Difference between the Gas and the Particles
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Modeling Combustion of Lycopodium Particles by Considering the Temperature Difference between the Gas and the Particles

机译：考虑气体与颗粒之间的温差，对番茄属颗粒的燃烧进行建模

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摘要

The effect of the temperature difference between the gas and the particles on propagation of premixed flames in a combustible mixture containing volatile fuel particles uniformly distributed in an oxidizing gas mixture is analyzed in this paper. It is presumed that the fuel particles vaporize first to yield a gaseous fuel,which is oxidized in the gas phase. The analysis is performed in the asymptotic limit,where the value of the characteristic Zel'dovich number is large,which implies that the reaction term in the preheating zone is negligible. Required relations between the gas and the particles are derived from equations for premixed flames of organic dust. Subsequently,the governing equations are solved by an analytical method. Finally,the variation of the dimensionless temperatures of the gas and the particles,the mass fraction of the particles,the equivalence ratio φ_g as a function of φ_u,the flame temperature,and the burning velocities of the gas and the particles are obtained. The analysis shows that the calculated value of φ_g is smaller than unity for certain cases,even though φ_u ≥1.
机译：本文分析了气体和颗粒之间的温差对在混合气体中均匀分布的挥发性燃料颗粒的可燃混合物中预混火焰传播的影响。假定燃料颗粒首先汽化以产生气态燃料，该气态燃料在气相中被氧化。该分析在渐近极限中进行，特征Zel'dovich数的值较大，这表明在预热区中的反应项可忽略不计。气体与颗粒之间的必要关系从有机粉尘的预混火焰方程式导出。随后，通过解析方法求解控制方程。最后，获得了气体和颗粒的无量纲温度，颗粒的质量分数，当量比φ_g作为φ_u的函数，火焰温度以及气体和颗粒的燃烧速度的变化。分析表明，即使φ_u≥1，在某些情况下φ_g的计算值也小于1。

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