Klimov-Williams criterion

FIGURE 4.46 Characteristic parametric relationships of premixed turbulent combustion. The Klimov-Williams criterion is satisfied below the heavy line Zk = 8L. 

Below and to the right of this line, the Klimov-Williams criterion is satisfied and wrinkled laminar flames may occur. The figure shows that this region includes both large and small values of turbulence Reynolds numbers and velocity ratios (VISA) both greater and less than 1, but predominantly large Da. 

Above and to the left of the criterion line is the region in which 4 < 4.-According to the Klimov-Williams criterion, the turbulent velocity gradients in this region, or perhaps in a region defined with respect to any of the characteristic lengths, are sufficiently intense that they may destroy a laminar flame. 

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