F. D’Ambrosio, A. Cuoci, A. Parente (ULB)

The description of particular combustion phenomena, e.g. flameless combustion, pollutants formation etc., requires the use of large kinetic mechanisms. CFD simulations of a practical system that involve also complex geometry, heat exchange, radiation, and turbulent flows are prohibitive in industrial applications due to the high computational cost. Therefore, reduction of detailed kinetic mechanisms is necessary to allow the resolution of practical problem with the required accuracy and within an affordable computation time. Usually, kinetic mechanism reduction is performed via pre-processing methods based on the analysis of the kinetic mechanism in a range of operating conditions. However, during the simulation the kinetic scheme is not adapted to the local conditions. The present work aims to couple an on-the-fly reduction method for chemistry  with two combustion solvers edcSMOKE, an open solver for turbulent combustion, and laminarSMOKE, an open solver for laminar combustion. Validation is performed through a series of 2D simulations, using large kinetic mechanisms. The sensitivity of the reduction method to the modelling parameters is also presented.