This paper studied ignition and burnout characteristics of methane-air premixed flame with H2 added,using chemical reaction mechanism.The effect of hydrogen on methane combustion and ignition temperature,burning rate and burnout time are discussed through analyzing the calculated results.Results show that the hydrog en in methane/air mixture not only decreases the ignition temperature greatly,bu t increases the burning rate and shortens the burnout time notably.These calcula ted results are identical with the experimental results.%利用化学反应动力学机理研究了甲烷-空气预混火焰添加H2的着火和燃尽特性。通过分析计算，讨论了氢气对甲烷燃烧过程及着火温度、燃烧速率、燃尽时间的影响。结果表明，甲烷火焰中少量氢气的存在不仅可以降低甲烷的着火温度，而且可以显著增大燃烧速率，缩短燃尽时间。这些结果与已有的实验结果吻合。
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