67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

P0036: Experimental two dimensional cellular flames

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Authors

• CHRISTOPHE ALMARCHA, Aix Marseille Universite, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, France
• JOEL QUINARD, Aix Marseille Universite, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, France
• BRUNO DENET, Aix Marseille Universite, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, France
• ELIAS AL-SARRAF, Aix Marseille Universite, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, France
• JEAN-MARIE LAUGIER, Aix Marseille Universite, CNRS, PIIM UMR 7345, 13397, Marseille, France
• EMMANUEL VILLERMAUX, Aix Marseille Universite, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, France

DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.P0036

Premixed flames, where fuel and oxidizer are mixed prior to combustion, are widely used, for example in gas turbines or internal combustion engines like vehicle gasoline engines, as they give a practical mean to control the rate of combustion and pollutant formation. However, thermal and hydrodynamical effects distort the global flame front, which presents a collection of cells, separated by cusps, merging and birthing at random, and having a broad distribution of sizes.

Thanks to an original experimental facility that allows quantitative imaging, the shape and dynamics of these flames propagating between two glass plates separated by a thin gap of 5mm in width is analyzed. We study both the formation and merging of the cells to understand the steady statistical features of the front, features which sets its propagation speed and may influence the formation of pollutants.

Physics of Fluids summary