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Abstract
The unbumed gas region of wrinkled laminar flame stabilized on a Bunsen burner was visualized by a laser tomography and the fractal analysis was applied to the boundaries of unbumed gas to characterize the geometry of wrinkled laminar flame. The fractal dimension of the wrinkled laminar flame front is independent of any scale of the unbumed mixture turbulence. It increases with the turbulence intensity from 2.20 to 2.32 and approaches at high intensity turbulence to 2.36 which is the fractal dimension of the non-reactive turbulent flow. The existence of inner and outer cut-offs is clearly shown. Both cut-ofls are also independent of any scale of unbumed mixture turbulence. The inner cut-off coincides with the scale of wrinkles caused by the laminar flame instability and the outer cut-off is determined by the flame base diameter.