Combustion and Radiation Modeling of Non-premixed Turbulent DLR-A Flame

In this work, combustion and radiation models are employed to simulate a non-premixed turbulent DLR-A flame in OpenFOAM. In a DLR-A flame, the low-velocity air co-flow surrounds an axisymmetric methane flame. The mean flow was calculated using k-ε turbulence model. The Eddy Dissipation Concept (EDC) with GRI-Mech 3.0, to model turbulence-chemistry interactions (TCI), is applied. The flame temperature is validated against the experimental results. The discrete ordinates method (DOM) and the P1 model are used to calculate the wall radiative heat flux for the gray gas mixture. The gas absorption constant has a significant impact on the radiative flux. H2O and CO2 are the primary radiative gases in the DLR-A flame. The weighted-sum-of-gray-gases (WSGG) and \(k\) -distribution approaches are implemented to evaluate the radiative flux.