中文摘要：

主要目的是探索详细化学反应模型引入油气热爆燃的热力学模型中的方法。首先建立了油气热爆燃的详细化学模型,即基于化学位确定系统组分,根据油气热爆燃起爆的特点确定控制热着火的主要化学链,基于组分的Arrhenius速度公式和热力学参数之间的关系,确定组分的消耗和生成速度以及组分化学反应放热率。然后以低马赫数、可压缩方程作为流场控制方程组,耦合详细化学模型和辐射模型,建立了基于化学动力学和热力学统一的油气热着火起燃过程的数学模型,即统一模型。基于该模型,对绝热受限空间内油气连续接触温升热壁条件下的热着火过程进行了数值仿真研究,并把计算结果和SCRS系统、零维模型以及实验值进行对比分析,研究结果表明：统一理论模型综合考虑了详细化学反应、复杂边界条件、流体流动,能较好解决油气热着火起燃过程的数值模拟问题。

英文摘要：

The way how to draw detailed chemical reactions of gasoline-air mixture into the thermal explosion model is studied in this paper.First and above,We establish detailed chemical reaction model of gasoline-air mixture thermal ignition.That is to say,species are determined based on chemical-digit;chemical reaction chains of controlling of thermal ignition are got according to the characteristic of gasoline-air mixture;based on the relation between chemical reaction rate of species and thermodynamic parameters,both the rate of species consumption or production and the heat release rate of species＇ chemical reaction are got.Then using low mach,compressible equation as control equations,coupling P-1 radiation model and the detailed chemical reaction model, the mathematical model of gasoline-air mixture thermal ignition process,namely comprehensive model,is established on the basis of unification of chemical kinetics and thermodynamics.In the end,taking gasoline-air mixture thermal deflagration due to contacting with hot wall continuously where temperature is raising in a confined insulation space as example,We complete the numerical simulation analysis based on the comprehensive model.The result is demonstrated by the experiment data,and compared with SCRS system and zero dimensional system.The research result shows that the comprehensive model,in which fluid field,boundary conditions and detailed chemical reaction control together is efficient for gasoline-air mixture thermal ignition.