Investigation of the Prediction Performance of Turbulence and Combustion Models for the Turbulent Partially-premixed Jet Flame

The prediction performance of 9 model sets, which combine 3 turbulent models and 3 combustion models, was investi-gated numerically for turbulent partially-premixed jet flame. The standard κ-ε (SKE), Realizable κ-ε (RKE) and Rey-nolds stress model (RSM) were used as a turbulence model, and the eddy dissipation concept (EDC), steady laminar flamelet (SLF) and unsteady laminar flamelet model (ULF) were also adopted as a combustion model. The prediction per-formance of those 9 model sets was evaluated quantitatively and qualitatively for Sandia D flame of which flame struc-ture was measured precisely. The flame length was predicted as, from longest to shortest, RSM> SKE> RKE, and the RKE predicted the flame length of the jet flame much shorter than experiment. The flame temperature was over predicted by the combination of RSM + SLF or RSM + ULF while the flame length obtained by RSM + SLF and RSM + ULF was well agreed with the experiment. The combination of SKE + SLF and SKE + ULF predicts well the flame length as well as the temperature distribution. The SKE turbulence model was most superior to the other turbulent models, and SKE