掺有轻质不饱和烃的富甲烷预混合层流火焰.第1部分：丙二烯和丙炔
Rich methane premixed laminar flames doped by light unsaturated hydrocarbons - Part I : allene and propyne
摘要：
本文研究了三种层流预混富燃火焰的结构：一种纯甲烷火焰和两种分别掺有联烯和丙炔的甲烷火焰。三种火焰的气体含有20.9%（摩尔）的甲烷和33.4%的氧气，对应于纯甲烷火焰的当量比为1.25。在两种掺杂火焰中，添加2.49%的C3 H4，对应于12%的C3 H4/CH 4比率和1.55的当量比。三种火焰在压力为6.7kPa、温度为333 K、气体流速为36 cm/s的燃烧器上稳定。用石英微探针取样后，用气相色谱法测定稳定物种的浓度分布。量化的物质包括一氧化碳和二氧化碳、甲烷、氧气、氢气、乙烷、乙烯、乙炔、丙炔、丙二烯、丙烯、丙烷、1，2-丁二烯、1，3-丁二烯、1-丁烯、异丁烯、1-丁炔、乙烯基乙炔和苯。温度是使用安装在外壳内的PtRh（6%）-PtRh（30%）热电偶测量的，范围从靠近燃烧器的700 K到1850 K。为了模拟这些新的结果，我们对本实验室先前开发的C3-C4不饱和烃反应机理进行了一些改进。通过流量分析，得出了联烯和丙炔消耗和C6芳烃生成的主要反应途径。
英文摘要：
The structure of three laminar premixed rich flames has been investigated: a pure methane flame and two methane flames doped by allene and propyne, respectively. The gases of the three flames contain 20.9% (molar) of methane and 33.4% of oxygen, corresponding to an equivalence ratio of 1.25 for the pure methane flame. In both doped flames, 2.49% of C3H4 was added, corresponding to a ratio C3H4/CH4 of 12% and an equivalence ratio of 1.55. The three flames have been stabilized on a burner at a pressure of 6.7 kPa using argon as dilutant, with a gas velocity at the burner of 36 cm/s at 333 K. The concentration profiles of stable species were measured by gas chromatography after sampling with a quartz microprobe. Quantified species included carbon monoxide and dioxide, methane, oxygen, hydrogen, ethane, ethylene, acetylene, propyne, allene, propene, propane, 1,2-butadiene, 1,3-butadiene, 1-butene, isobutene, 1-butyne, vinylacetylene, and benzene. The temperature was measured using a PtRh (6%)-PtRh (30%) thermocouple settled inside the enclosure and ranged from 700 K close to the burner up to 1850 K. In order to model these new results, some improvements have been made to a mechanism previously developed in our laboratory for the reactions of C3-C4 unsaturated hydrocarbons. The main reaction pathways of consumption of allene and propyne and of formation of C6 aromatic species have been derived from flow rate analyses.
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