Abstract
The influence of the integral length scale L of turbulence on the flame speed St has been numerically investigated by simulating the planar and statistically spherical premixed flames which propagate in homogeneous and iso-tropic turbulence. The simulations have been performed using the Turbulent Flame Speed Closure Model discussed briefly in the paper. The results of the simulations show that, for statistically spherical flames, the dependence of St on L reverses as the flame kernel grows. This prediction is supported by a survey of known experimental data.
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