Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder

Maxence Miguel-Brebion (1) , Daniel Mejia (1) , Pradip Xavier (1) , Florent Duchaine (2) , Benoît Bédat (1) , Laurent Selle (1) , Thierry Poinsot (1)

1 IMFT - Institut de mécanique des fluides de Toulouse
2 CERFACS - Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique

The mechanisms controlling laminar flame anchoring on a cylindrical bluff-body are investigated using DNS and experiments. Two configurations are examined: water-cooled and uncooled steel cylinders. Comparisons between experimental measurements and DNS show good agreement for the flame root locations in the two configurations. In the cooled case, the flame holder is maintained at about 300 K and the flame is stabilized in the wake of the cylinder, in the recirculation zone formed by the products of combustion. In the uncooled case, the bluff-body reaches a steady temperature of about 700 K in both experiment and DNS and the flame is stabilized closer to it. The fully coupled DNS of the flame and the temperature field in the bluff-body also shows that capturing the correct radiative heat transfer from the bluff-body is a key ingredient to reproduce experimental results.

Mots clés: Heat transfer; DNS; Laminar flame; Combustion

Domaines: Milieux fluides et réactifs

Maxence Miguel-Brebion, Daniel Mejia, Pradip Xavier, Florent Duchaine, Benoît Bédat, et al.. Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder. Combustion and Flame, 2016, 172, pp.153-161. ⟨10.1016/j.combustflame.2016.06.025⟩. ⟨hal-01557859⟩