Quantitative Analysis of Flame Instabilities in a Hele-Shaw Burner

Elias Al Sarraf (1) , Christophe Almarcha (1) , Joël Quinard (1) , Basile Radisson (1) , B. Denet (1)

1 IRPHE - Institut de Recherche sur les Phénomènes Hors Equilibre

We show in this paper that a Hele-Shaw burner can be used for studying the development of premixed flame instabilities in a quasi-two dimensional configuration. It is possible to ignite a plane flame at the top of the cell, and to measure quantitatively the growth rates of the instability by image analysis. Experiments are performed with propane and methane-air mixtures. It is found that the most unstable wavelength, and the maximum linear growth rate of perturbations, directly measured in the present experiments, have the same order of magnitude as those previously measured on flames propagating freely downwards in wide tubes.

Mots clés: Premixed flames; Darrieus-Landau instability; Hele-Shaw burner

Domaines: Milieux fluides et réactifs; Mécanique des fluides [physics.class-ph]

Elias Al Sarraf, Christophe Almarcha, Joël Quinard, Basile Radisson, B. Denet. Quantitative Analysis of Flame Instabilities in a Hele-Shaw Burner. Flow, Turbulence and Combustion, 2018, 101 (3), pp.851-868. ⟨10.1007/s10494-018-9940-4⟩. ⟨hal-01820227⟩