A model is formulated describing die dependence of the turbulent-flame speed on die extent of chemical-heat release. It is shown that the turbulent-flame speed varies inversely with die 3/2 power of the temperature ratio across the flame when the temperature ratio is large. The results, which are valid for flame propagation in weakly turbulent flow (where the propagation speed is proportional to the square of the turbulence intensity upstream of the flame) extend earlier predictions that were limited to die regime of low-to-moderate chemical heat release. The model presented herein does not account for effects of intrinsic flame instability and is appropriate for conditions where influences of buoyancy and flame stretch on flame dynamics are negligible.
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