Simulations of flame acceleration and deflagration-to-detonation transitions in methane-air systems.
Kessler-DA; Gamezo-VN; Oran-ES
Combust Flame 2010 Nov; 157(11):2063-2077
Flame acceleration and deflagration-to-detonation transitions (DDT) in large obstructed channels filled with a stoichiometric methane-air mixture are simulated using a single-step reaction mechanism. The reaction parameters are calibrated using known velocities and length scales of laminar flames and detonations. Calculations of the flame dynamics and DDT in channels with obstacles are compared to previously reported experimental data. The results obtained using the simple reaction model qualitatively, and in many cases, quantitatively match the experiments and are found to be largely insensitive to small variations in model parameters.
Flammable-gases; Methanes; Gases; Gas-mixtures; Acceleration; Ignitability; Explosive-gases; Mining-industry; Mine-gases; Explosive-atmospheres; Confined-spaces; Natural-gas;
Author Keywords: Deflagration-to-detonation transition; Methane-air explosions; Flame acceleration; Obstructed channels
D.A. Kessler, Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC, USA
Combustion and Flame