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以往关于层流火焰速度的理论分析均只考虑单组分燃料,本文对双组分燃料的平面火焰进行了大活化能渐近理论分析。在理论分析中,将火焰结构分为预热区、化学反应区和平衡区,并在大活化能假设下对各个区域分别求解了关于温度与燃料质量分数的微分方程。根据每两个区域分界面上满足的结合条件,本文推导出了双组分燃料的层流火焰速度模型。该模型表明双组分燃料层流火焰速度的平方为各个单组分燃料层流火焰速度平方的加权平均。
In the past, theoretical analysis of laminar flame only considered single-component fuel. In this paper, the asymptotic theory of large activation energy of planar flame of two-component fuel was analyzed. In the theoretical analysis, the flame structure is divided into the preheating zone, the chemical reaction zone and the equilibrium zone, and the differential equations about the temperature and the fuel mass fraction are respectively solved for each zone under the assumption of large activation energy. Based on the satisfying conditions at the interface between every two regions, the laminar flame velocity model of two-component fuel is deduced. The model shows that the square of the two-component fuel laminar flame velocity is the weighted average of the squared flame velocities for each individual component fuel layer.