Transport and chemical kinetics of H₂/N₂ jet flame: A flamelet modelling approach with NOx prediction

Abstract

 In this work simulation of a turbulent H₂/N₂ jet diffusion flame with flamelet modelling has been presented. The favre-averaged mixture fraction has been employed to model the combustion. Favre-averaged scalar quantities have been calculated from flamelet libraries by making use of a presumed Probability Density Function (PDF) method. The predicted flame temperature profiles and chemical species concentrations are compared with TNF experimental data obtained from Sandia/California. Predictions considering the unity Lewis number flamelet are found to be in good agreement with temperature and chemical species measurements. Predicted NO results also compared and shown with other species. This study shows that the combustion simulation using unity Lewis number flamelets are effective for predicting the flow, temperature and chemical kinetics of H₂/N₂ diffusion flame. To account for fluctuations of mixture fraction, its distribution is presumed to have the shape of a beta-function.

Keywords: Non-premixed flame, Turbulent Combustion, Flamelet modelling  

doi: 10.3329/jname.v2i1.2028

Journal of Naval Architecture and Marine Engineering 2(1)(2005)33-40