The effect of pressure on hydrogen (H 2 ) enriched natural gas jet flames in crossflow is experimentally investigated here. Simultaneously acquired high speed OH* chemiluminescence, OH planar laser induced fluorescence (PLIF), and stereoscopic particle image velocimetry are used to study flames at conditions typical of a gas turbine premixer, i.e. at elevated pressure, preheated crossflow, and in confinement. Two different H 2 enrichment levels (40% and 20%, by volume) and pressures (10 bar and

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... 15 bar) were studied here. Flames at the higher H 2 enrichment level were found to be stabilized on the windward side, while the flames at the lower H 2 enrichment were found to be stabilized only on the leeward side. Increased H 2 enrichment was also associated with greater sootiness in the measured region. Jet centerline trajectories showed greater penetration for the higher H 2 enrichment flames, which is in agreement with existing theories on the effect of heat release from a flame on crossflow entrainment. There were no significant changes observed in the mean OH* chemiluminescence, OH-PLIF, velocity fields, and velocity fluctuation fields with changes in pressure.