EXPERIMENTAL CHARACTERIZATION OF A H2-FUELED DUAL-SWIRL BURNER

This study investigates flame morphology, NOx emissions, and stability in a Rich-Premixed, Air-Staged, Hydrogen-fueled Dual-Swirl burner (RAPIDS-H). The flame consistently shows an M-shaped profile, with the central V-shaped region flattening as the premix equivalence ratio (PHI p) increases. Flame length and NOx emissions (EINo = 1.7 - 2.8 g/kgH2) decrease with lower global equivalence ratio (PHI g), likely due to cooler and more compact flames. Both mild and strong flashback events are observed, but flashback can be reversed without flame extinction. Future work will aim to enhance flashback resistance and analyze flow structure and NOx formation for performance optimization.