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Humidi ed gas turbines using steam generated from excess heat feature increased cycle e ciencies. Injecting the steam into the combustor reduces NOx emissions, ame temperatures and burning velocities, promising a clean and stable combustion of highly reactive fuels, such as hydrogen or hydrogen-methane blends. This study presents laminar burning velocities for methane, and hydrogen-enriched methane (10mol% and 50mol%) at steam contents up to 30% of the air mass ow. Experiments were conducted on prismatic Bunsen ames stabilized on a slot-burner employing OH planar laserinduced uorescence for determining the ame front areas. The experimental burning velocities agree well with results from one dimensional simulations using the GRI 3.0 mechanism. Burning velocities are increased with hydrogen enrichment, and reduce non-linearly with ascending steam molar fractions, showing the potential of steam dilution for a stable combustion of these fuels over a wide ammability range.

1154 BURNING VELOCITIES OF HYDROGEN-METHANE-AIR MIXTURES AT HIGHLY STEAM-DILUTED CONDITIONS