Comparison of methane combustion mechanisms using laminar burning velocity measurements

نویسندگان

چکیده

Large amount of experimental data for laminar burning velocity (LBV) measurements methane (+ H2/CO) ? oxygen diluent mixtures (5500 points in 646 datasets) covering wide ranges equivalence ratio, cold side temperature and pressure were collected from 111 publications. The diluents included N2, H2O, CO2, Ar He. files are available on the ReSpecTh site (http://respecth.hu). Performances 12 combustion mechanisms reproducing these LBV analyzed according to experiment types conditions. Most could predict well LBVs stoichiometric fuel-lean ratios higher than 60%. performances several relatively poor at other Focusing operating conditions natural gas engines, we recommend application FFCM-I-2016, SanDiego-2014, NUIG1.1-2021 engine simulations. Mechanisms Aramco-II-2016, Konnov-2009, Caltech-2015 Glarborg-2018 have lowest average errors reproduction all data. Using local sensitivity analysis most accurate mechanisms, identified 29 important elementary reactions, which, however, not present mechanisms. We also large directly measured theoretically calculated rate coefficients reactions compared them with used Reactions found any Konnov-2009 but missing Glarborg-2018, Caltech-2015, FFCM-I-2016 added six investigate if extended mechanism performs better original one. Some became best performing

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ژورنال

عنوان ژورنال: Combustion and Flame

سال: 2022

ISSN: ['1556-2921', '0010-2180']

DOI: https://doi.org/10.1016/j.combustflame.2021.111867