Effects of Dilution on Laminar Burning Velocity of Premixed Methane/Air Flames
Effects of Dilution on Laminar Burning Velocity of Premixed Methane/Air Flames
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DOI：
10.1021/ef101482d
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发表时间：
2011-03-01
期刊：
影响因子：
5.3
通讯作者：
Dagaut, P.
中科院分区：
文献类型：
--
作者：
Galmiche, B.;Halter, F.;Dagaut, P.
通过层流燃烧速度的实验和数值模拟研究了稀释对预混合甲烷/空气燃烧的影响。实验在大气压下进行，使用 GRI 机制和 Chemkin 包的 Premix 代码获得 393 K(j) 计算结果。层流燃烧速度是针对几种稀释剂（氮气、二氧化碳、蒸气水、代表废气、氦气和氩气的前三种气体的混合物）和不同的稀释百分比来确定的。当量比保持恒定等于化学计量。实验数据和计算结果之间取得了很好的一致性。由于热容似乎对层流火焰具有主要影响，因此提出了稀释剂热容与层流燃烧速度之间的明确相关性。
Effects of dilution on premixed methane/air combustion are investigated through experiments and numerical simulations on laminar burning velocities. Experiments are carried out at atmospheric pressure and 393 K(j) computed results are obtained using the GRI mechanism and the Premix code of the Chemkin package. Laminar burning velocities are determined for several diluents (nitrogen, carbon dioxide, vapor water, a mixture of the three previous gases representative of exhaust gases, helium, and argon) and for different dilution percentages. The equivalence ratio is kept constant equal to stoichiometric. Excellent agreements between experimental data and computed results are obtained. Because heat capacity seems to possess the predominant effect on the laminar flame, an explicit correlation between the heat capacity of the diluent and the laminar burning velocity is proposed.