Large Eddy Simulation of Vented Deflagration

Pierre Quillatre (1) , Olivier Vermorel (1) , Thierry Poinsot (1) , Philippe Ricoux (2)

1 CERFACS - Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique
2 TOTAL S.A.

In order to understand gas explosion phenomena in industrial buildings, a reduced-scale vented combustion 6 chamber is investigated numerically. In this configuration, a flame is ignited in an initially quiescent flammable mixture and 7 propagates past solid obstacles, generating a strong pressure increase. The aim of this numerical study is twofold: The first 8 objective is to show how large eddy simulation manages to reproduce the parameters of critical relevance for this multiscale 9 problem, in particular the overpressure generated during the flame propagation. The second objective is to highlight that, even if 10 large- to small-scale turbulence effects play a crucial role in the flame development and the resulting overpressure, it is also 11 needed to correctly account for thermo-diffusive scale phenomena.

Mots clés: Explosion simulation vented

Domaines: Mécanique [physics]

Pierre Quillatre, Olivier Vermorel, Thierry Poinsot, Philippe Ricoux. Large Eddy Simulation of Vented Deflagration. Industrial and engineering chemistry research, 2013, vol. 52, pp.11414-11423. ⟨10.1021/ie303452p⟩. ⟨hal-00949063⟩