The present investigation describes an experimentally verified full chemistry CFD model for an axial reacting Jet-in-Crossflow at a pressure of five atmospheres. The lean headend regime was investigated for the fuel methane to create a study highly relevant to optimize gas turbine combustors applied industrially. Premixed combustion was investigated with slightly lean, near-stoichiometric and slightly rich equivalence ratio in the axial fuel line. Effect of preheating the fuel line as well as varying the axial diluent were simulated and their outcomes verified with experimental data. A jet pre-heated to 500K showed the flame position to move closer to the jet point of contact with crossflow, minimizing flame lift-off and aiding flame stability. Changing the diluent from air to pure nitrogen or carbon monoxide resulted in significantly lower axial reaction rates due to the absence of additional oxidizer. Flame characteristics were compared with operating conditions of similar reaction rate, allowing to extend existing knowledge on jet-in-crossflow dependencies with the tuning options analyzed.
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