Abstract
Effects of turbulence characteristics on three-dimensional structure and fractal characteristics of flame front were investigated by direct numerical simulation (DNS) of hydrogen-air turbulent premixed flame in high Reynolds number turbulence. The detail kinetic mechanism including 12 reactive species and 27 elementary reactions was used to represent the hydrogen-air reaction. Flame structure in high Reynolds number was very complicated due to strong coherent fine scale eddy and unburned mixture appeared behind flame front. Fractal characteristics of flame front were also investigated by three-dimensional box counting method. Strong correlation between the inner cutoff and the ratio of diameter of coherent fine scale eddy to laminar flame thickness has been observed.
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