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Published on: May 26, 2014
Development and Verification of the New Simplified Mechanism for CH4/O2/CO2 Laminar Premixed Flame under High
Ying Chen1,2, Jingfu Wang1,2, Conghao Li1,2
1MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, the Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
Abstract:
To study the laminar premixed flame characteristics of methane under an O2/CO2 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.
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