Open AccessDevelopment and Verification of the New Simplified Mechanism for CH4/O2/CO2 Laminar Premixed Flame under High Pressure
Author(s) -
Ying Chen,
Jingfu Wang,
Conghao Li,
Xiaolei Zhang
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c00058
Subject(s) - laminar flow , laminar flame speed , premixed flame , ignition system , equivalence ratio , methane , elementary reaction , thermodynamics , flame structure , diffusion flame , chemkin , materials science , chemistry , analytical chemistry (journal) , mechanics , combustion , organic chemistry , physics , classical mechanics , kinetics , combustor
To study the laminar premixed flame characteristics of methane under an O 2 /CO 2 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.