中文摘要：

基于甲烷燃烧详细化学动力学机理Gri—Mech3．0，分别采用良搅拌反应模型以及层流预混火焰模型计算甲烷／空气预混燃烧过程．通过对详细机理的计算结果进行敏感性分析以及产物速率分析，提取骨干机理，再根据准稳态假设进一步简化，最终得到包含14种组分18个基元反应的简化机理．拓宽计算条件，将该18步简化机理与详细机理进行对比，结果表明，该简化机理在预测点火延迟时间方面具有较高精度，能够在较大热力学参数变化范同内较好地预测甲烷／空气预混燃烧现象．

英文摘要：

Based on the detail chemical kinetic mechanism of methane combustion, Gri-Mech3.0, methane/air premixed combustion process in some special cases was computed in this paper by perfectly stirred reaction model and premixed laminar flame model, respectively. Skeletal mechanism was then extracted from the detail mechanism through sensitivity analysis and rate-of-production analysis of the computed results. According to the quasi-steady state assumption, further reduction was carried out, and finally a reduced mechanism with 14 species and 18 elementary reactions was obtained. More cases were computed using this 18-step reduced mechanism in order to compare it with the detail mechanism. It is seen that the reduced mechanism shows good accuracy in predicting ignition delay, and besides, it can also predict the methane/air premixed combustion well within a wide range of thermodynamic parameters.