Abstract
Large Eddy Simulation (LES) is applied to the auto-ignition of an hydrogen jet issuing into a turbulent co-flowing air stream. A 19 step, 9 species detailed mechanism is used for modelling the chemical reactions. The influence of sub-grid fluctuations is accounted for by a sub-grid joint probability density function (PDF) for the reactive scalars. A Eulerian Stochastic Field method is used to solve the modelled form of the PDF transport equation. The model is able to reproduce ignition lengths and different regimes observed experimentally without adjustment of the sub-grid scale model parameters.
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