Combustion scenarios for hydrogen microjets (a review)
V.V. Kozlov1,2, M.V. Litvinenko3, Yu.A. Litvinenko3, A.S. Tambovtsev3
1S.A. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences (SB RAS, Novosibirsk, Russia
2S.S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences (SB RAS)
3S.A. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences (SB RAS), Novosibirsk, Russia
Keywords: hydrogen diffusion combustion, micro-jet combustion, round micro-jet, planar micro-jet, hydrodynamic stability, supersonic air jet, flame "locking" effect, "flame constriction region, " combustion regimes, gravitational acceleration vector, shadowgraphy
Abstract
This review summarizes the results of recent experimental studies on the diffusion combustion of hydrogen microjets. It examines the influence of nozzle geometry, jet profile and exit velocity, and gravitational factors on flame structure. Particular attention is paid to the combustion of hydrogen mixtures and the interaction mechanisms between a circular supersonic air jet and a coaxial (co-flowing) hydrogen stream.
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