一种航空煤油数值模拟替代燃料的化学反应简化机理

通过对一种航空煤油数值模拟替代燃料(正癸烷)着火与燃烧的化学反应详细机理(包括67种组分,344个反应)进行反应流与敏感性分析,建立了该替代燃料的化学反应简化机理(包括50种组分,118个反应).分别采用详细机理与简化机理对正癸烷在激波管中的着火延迟时间、在预混燃烧炉内的燃烧过程进行了数值计算,并与实验结果进行了对比分析.结果表明:与实验数据相比,采用详细机理与简化机理计算得到的着火延迟时间、反应物与主要生成物的摩尔分数与炉壁距离的整体变化趋势吻合较好.正癸烷可以作为航空煤油的一种数值模拟替代燃料,同时,所建立的化学反应简化机理能很好的描述正癸烷着火与燃烧的动力学特性. 

Reduced chemical reaction mechanism of a surrogate fuel for kerosene

The detailed reaction mechanism (including 67 species and 344 reactions) of the ignition and combustion of a surrogate fuel ( n-decane) for kerosene was reduced by adopting net reaction rate analysis and sensitivity analysis,and a reduced mechanism (including 50 species and 118 reactions) was gained.The ignition delay time of n-decane in the shock tube and the process of n-decane premixed combustion in the premixed burner were simulated by adopting the detailed and reduced reaction mechanisms,and the simulated results was compared with the experimental data.The results show that the ignition delay time,the shape of the profiles of the mole fractions of the reactants and the major combustion products simulated by the detailed mechanism and the reduced mechanism agree well with the experimental data.The n-decane can be a surrogate fuel for kerosene,and the reduced reaction mechanism can describe the kinetic characteristics of the ignition and combustion of n-decane.