【摘要】 以甲烷掺混乙烯对冲扩散火焰为研究载体，基于火焰多参数试验测量数据，分析了两种常用于模拟预测多环芳烃（polycyclic aromatic hydrocarbon, PAH）及碳烟生成的反应动力学机理，即气相化学反应机理（KAUST PAH mechanism 2,KM2）和AramcoMech机理.研究结果表明：两种机理均能较准确地预测甲烷掺混乙烯扩散火焰的热化学结构；两种机理关于甲烷掺混对PAH及碳烟生成的影响预测效果不佳；两种机理均未能预测甲烷掺混对乙烯火焰中PAH及碳烟生成的抑制行为；通过比较两种机理中PAH及碳烟生成路径的异同，发现两种机理均高估了炔丙基自由基（C₃H₃·）生成对甲烷掺混的敏感性；火焰多参数测量数据有助于进一步优化和验证甲烷燃料的反应机理.更多还原

【Abstract】 The reaction kinetics mechanisms of KAUST PAH mechanism 2（KM2） and AramcoMech are commonly used to simulate and predict the generation of polycyclic aromatic hydrocarbon（PAH） and soot. The two kinetics mechanisms were evaluated based on the flame multi-parameter measurement data using methane mixed with ethylene opposed diffusion flame as research carrier. The results show that the two mechanisms can accurately predict the thermochemical structure of methane mixed with ethylene diffusion flame. However, the prediction performance of the influence of methane mixing on PAH and soot generation is poor. Neither mechanism fails to predict the inhibition of PAH and soot generation in methane mixed with ethylene flame. Comparing the similarities and differences of PAH and soot generation paths between the two mechanisms, it is found that both mechanisms overestimate the sensitivity of propargyl radical（C₃H₃·）generation to methane blending. The flame multi-parameter measurement data are helpful to further optimize and verify the reaction mechanism of methane fuel.更多还原