针对航空煤油典型裂解工况的裂解产物, 本文提出了以2.99％氢气、45.05％甲烷、36.96％乙烯、0.76％环己烯、8.89％甲苯和5.35％正十二烷 (摩尔分数) 的六组分煤油裂解产物替代模型, 构建了包含323个物种, 1544步反应的化学动力学机理.使用Chemkin-pro程序进行宽温度范围裂解产物的动力学模拟, 点火延迟模拟结果与实验值吻合较好;点火延迟敏感性分析的结果表明HO2+OH=H2O+O2是机理中的关键反应, 同时燃烧中间产物与氧气、HO2和OH自由基的反应也对点火影响较大.该机理模拟精度较高, 能够较好的再现航空煤油裂解产物的燃烧特性.%For the cracked products of aviation kerosene under typical pyrolysis condition, a six-component surrogate model comprising 2.99％hydrogen, 45.05％methane, 36.96％ethylene, 0.76％cyclohexene, 8.89％toluene and 5.35％n-dodecane (mole fraction) was proposed, and then a detailed reaction mechanism for the combustion of the cracked products that consists of 323 species and 1544 elementary reactions has been developed.The proposed mechanism has been validated by the kinetic simulation of ignition delay time with Chemkin-pro package.The predicted results are in good agreement with the experimental data.Moreover, sensitivity analysis reveals that HO2+OH=H2O+O2 is the key reaction and the reactions between intermediates and O2, HO2 and OH also play an important role on the ignition behavior.This mechanism can reproduce the combustion characteristics of cracked aviation kerosene with high accuracy.
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