Based on the concept of flamelet

the Sydney University CH4/H2 bluff-body stabilized flame was studied using steady laminar flamelet model (SLFM) and Eulerian particle flamelet model(EPFM)

respectively. The revised Reynolds stress model (RSM) was used and two different chemical reaction mechanisms were also considered. The numerical results of the turbulent flame structure

major species concentrations and nitrogen oxides predictions by using different models were compared with the experimental data. The comparison showed that the prediction of the temperature

and major species calculated with these two mechanisms were basically same

the SLFM can accurately predict the combustion field; the OH results of the EPFM in some regions were closer to the experiment. The result of the SLFM coupled with the GRI-Mesh 211 mechanism reduced by two times after being post-processed by the EPFM model can predict the NO concentration more accurately

testifying the importance of the chemical reaction mechanism and the unsteady effect on the prediction of nitrogen oxides.