Numerical analysis of the effect of CO2 on combustion characteristics of laminar premixed methane/air flames

The freely-propagating laminar premixed flames of (CH4+CO2)/air mixtures were calculated with the PREMIX code at various CO2 contents (0–0.35) and equivalence ratios (0.7–1.3). The chemical reaction mechanism GRI-Mech 3.0 was chosen to determine the effects of CO2 addition. The chemical effects of CO2 and the changes of the mole fraction on the important active radicals CH3, OH, H and O and the sensitivity of the main reactions contributing to...