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首页> 外文会议>International Symposium on Combustion; 20060805-11; University of Heidelberg(DE) >The effect of reformate gas enrichment on extinction limits and NO_x formation in counterflow CH_4/air premixed flames
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The effect of reformate gas enrichment on extinction limits and NO_x formation in counterflow CH_4/air premixed flames

机译：重整气富集对逆流CH_4 /空气预混火焰中消光极限和NO_x形成的影响

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The reformate gas enriched counterflow lean premixed CH_4/air flames were studied by numerical simulation in this paper. The reformate gas was assumed to be the product of partial oxidation of methane by air, and it consists of H_2, CO and N_2. Detailed chemistry and complex thermal and transport properties were employed. The results indicate that the addition of the reformate gas enlarges the flammable region, and extends the lean flammability limit of counterflow CH_4/air premixed combustion. When the reformate gas is added, the formation of NO is reduced in a near-stoichiometric flame, and increased in an ultra-lean flame at a constant equivalence ratio. The more significant advantage of the reformate gas enriched lean premixed combustion is that it greatly reduces the formation of NO by allowing a combustor to operate at leaner condition without any effect on flammable range. Further, the addition of the reformate gas decreases the formation of NO_2 and N_2O at a constant equivalence ratio.
机译：通过数值模拟研究了重整气富集的逆流贫油预混CH_4 /空气火焰。假定重整气体是甲烷被空气部分氧化的产物，它由H_2，CO和N_2组成。使用了详细的化学以及复杂的热和传输性能。结果表明，重整气的加入扩大了可燃区域，并扩大了逆流CH_4 /空气预混燃烧的稀薄燃烧极限。当添加重整气体时，在恒定化学当量比的情况下，在近化学计量的火焰中NO的形成减少，而在超稀薄火焰中NO的形成增加。重整气体富集的稀薄预混燃烧的更显着优点是，它通过允许燃烧器在稀薄条件下运行而对可燃范围没有任何影响，从而大大减少了NO的形成。此外，重整气体的添加以恒定的当量比减少了NO_2和N_2O的形成。

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