The effects of hydrogen enrichment in the SGT-800 3rd generation DLE burner fitted in an atmospheric combustion rig have been numerically investigated. Three different mixtures with 0%, 60% and 80% hydrogen enrichment to methane have been studied. In this study a URANS (Unsteady Reynolds Averaged Navier-Stokes) approach is applied. The chemistry is included through the use of laminar flamelet libraries in combination with a presumed PDF (Probability Density Function). The mean reaction rate is acting as a source term to a reaction progress variable, and is modelled using a fractal combustion model. In the methane simulations two turbulence models, k–ω SST and k–ω SST-SAS, were evaluated. The latter model was found to predict results in good agreement with measurement data. The dynamic behaviour of the flame is captured by the SST-SAS model but not by the standard SST model. For the hydrogen enriched methane simulations the validated SST-SAS model with a calibrated model constant for the mean reaction rate from the methane simulations was used. The overall results such as flame position and global pressure drop are in good agreement with experimental data. The time averaged flame stabilization point is moving upstream towards the burner exit nozzle when the hydrogen enrichment is increasing. The total pressure drop over the burner is increasing with the increasing hydrogen level.

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