The effect of temperature on the adiabatic laminar burning velocities of CH 4−air and H 2−air flames

Abstract

The effect of temperature on the adiabatic laminar burning velocities of CH 4 + air and H 2 + air flames was analyzed. Available measurements were interpreted using correlation S L = S L0 ( T/ T 0) α . Particular attention was paid to the variation of the power exponent α with equivalence ratio at fixed (atmospheric) pressure. Experimental data and proposed empirical expressions for α as a function of equivalence ratio were summarized. They were compared with predictions of detailed kinetic models in methane + air and hydrogen + air flames. Unexpected non-monotonic behavior of α was found in rich methane + air flames. Modeling results are further examined using sensitivity analysis to elucidate the reason of particular dependences of the power exponent α on equivalence ratio.