RANGA-DINESH, K.K.J. ... et al., 2012. Combustion characteristics of H 2/N 2 and H 2/CO syngas nonpremixed flames. International Journal of Hydrogen Energy, 37 (21), pp. 16186–16200.
Turbulent nonpremixed H2/N2 and H2/CO syngas flames were simulated using 3D large
eddy simulations coupled with a laminar flamelet combustion model. Four different
syngas fuel mixtures varying from H2-rich to CO-rich including N2 have been modelled.
The computations solved the Large Eddy Simulation governing equations on a structured
non-uniform Cartesian grid using the finite volume method, where the Smagorinsky eddy
viscosity model with the localised dynamic procedure is used to model the sub-grid scale
turbulence. Non-premixed combustion has been incorporated using the steady laminar
flamelet model. Both instantaneous and time-averaged quantities are analysed and data
were also compared to experimental data for one of the four H2-rich flames. Results show
significant differences in both unsteady and steady flame temperature and major
combustion products depending on the ratio of H2/N2 and H2/CO in syngas fuel mixture.