Premixed flame instability in a Hele-Shaw burner

Abstract eng:
Experiments were performed with propane- and methane-air mixtures in a 2D-Hele-Shaw burner to determine the characteristic scales of the premixed flame instability that can be used to define an evolution equation for the front. It is found that the most unstable wavelength, depending on the Lewis number of the mixture, and the linear rate of growth of perturbations, directly measured in the present experiments, have the same order of magnitude than those previously measured on planar flames propagating freely downwards in wide tubes.

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