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首页> 外文期刊>Combustion, Explosion, and Shock Waves >Comparative Study of the Influence of CO2 and H2O on the Chemical Structure of Lean and Rich Methane-Air Flames at Atmospheric Pressure
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Comparative Study of the Influence of CO2 and H2O on the Chemical Structure of Lean and Rich Methane-Air Flames at Atmospheric Pressure

机译：大气压下CO2和H2O对稀薄和浓甲烷空气火焰化学结构影响的比较研究

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摘要

A comparative study of the influence of CO2 and H2O on both lean and rich CH4-air laminar flames is performed. Six premixed flames are stabilized on a flat flame burner at atmospheric pressure: lean (with the equivalence ratio maintained constant at φ = 0.7) and rich (with the equivalence ratio maintained constant at φ = 1.4) CH4-air, CH4-CO2-air, and CH4-H2O-air flames. These flames are studied experimentally and numerically. The [CQ2]/[CH4] and [H20]/[CH4] ratios are kept equal to 0.4 for both flames series. Species mole fraction profiles are measured by gas chromatography and Fourier transform infrared spectroscopy analyses of gas samples withdrawn along the vertical axis by a quartz microprobe. Flames structures are computed by using the Chemkinll/Premix code. Four detailed combustion mechanisms are used to calculate the laminar flame velocities and species mole fraction profiles: GRI-Mech 3.0, Dagaut, UCSD, and GDFkin~R3.0.
机译：进行了CO2和H2O对稀薄和浓CH4空气层流火焰影响的比较研究。在大气压力下，将六种预混火焰在平焰燃烧器上稳定：稀（当量比保持恒定在φ= 0.7）和浓（当量比恒定保持在φ= 1.4）CH4-空气，CH4-CO2-空气和CH4-H2O-空气火焰。对这些火焰进行了实验和数值研究。对于两个火焰系列，[CQ2] / [CH4]和[H20] / [CH4]的比率保持等于0.4。通过气相色谱法和傅立叶变换红外光谱法分析石英微探针沿垂直轴抽取的气体样品，可测量物种的摩尔分数分布。火焰结构是使用Chemkinll / Premix代码计算的。四种详细的燃烧机制用于计算层流火焰速度和物质摩尔分数分布：GRI-Mech 3.0，Dagaut，UCSD和GDFkin〜R3.0。

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