Mixing rules for state relationships of methane and acetylene/air diffusion flames

Measurements of concentrations of major gas species in laminar diffusion flames burning mixtures of CH 4 and C 2H 2 in air are reported. The results are interpreted in terms of the laminar flamelet concept. Two methods of estimating the state relationships of fuel mixtures were evaluated. Overall, a mixing rule that utilizes the information concerning the state relationships of the individual fuels provides better estimates of species concentrations in flames burning fuel mixtures than the generalized state relationships.