Chen Ying, Wang Jingfu, Li Conghao, Zhang Xiaolei
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, the Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
Beijing Key Laboratory of Heat Transfer and Energy Conversion, the Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
ACS Omega. 2021 Jul 16;6(29):18559-18565. doi: 10.1021/acsomega.1c00058. eCollection 2021 Jul 27.
To study the laminar premixed flame characteristics of methane under an O/CO atmosphere in high pressure, a new simplified chemical mechanism (44 steps and 19 species) was extracted from the GRI-Mech 3.0 mechanism. The sensitivity coefficient analysis method is used to retain the elementary reactions that have great influence on the target parameters and remove other secondary elementary reactions. Meanwhile, the closeness of the simplified mechanism initially obtained was verified. The results of the laminar burning velocities, the distribution of the main species, and the ignition delay time were compared between the two mechanisms for the premixed flame and the ignition process. Overall, the simplified mechanisms performed fairly well over a wide range of pressure, equivalence ratio, and fuel mixture composition.
为研究高压下O/CO气氛中甲烷的层流预混火焰特性，从GRI-Mech 3.0机理中提取了一种新的简化化学机理（44步和19种组分）。采用灵敏度系数分析方法保留对目标参数有重大影响的基元反应，去除其他次要基元反应。同时，对最初得到的简化机理的相近性进行了验证。比较了两种机理在预混火焰和着火过程中层流燃烧速度、主要组分分布以及着火延迟时间的结果。总体而言，简化机理在较宽的压力、当量比和燃料混合物组成范围内表现良好。
