Ignition in nonpremixed counterflowing hydrogen versus heated air: Computational study with detailed chemistry☆
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2020, International Journal of Hydrogen EnergyCitation Excerpt :At elevated temperature, exceeding the auto-ignition temperature, lifted flames were also observed in jets in a hot co-flow [23] and in Direct Numerical Simulation [24]. However, it is unclear if the same trend would persist with increasing ambient pressure and temperature, as the ignition falls to a different ignition limit regime associated with different chemical kinetics and reaction paths [25,26]. In CI engine-relevant conditions, there are very few studies of H2 ignition and flame structure.
Effects of hydrogen addition on non-premixed ignition of iso-octane by hot air in a diffusion layer
2019, Combustion and FlameCitation Excerpt :They observed that the incipient ignition spot is always associated with the most reactive fraction and it is nearly independent of turbulence intensity. Similar observations were made in counterflow diffusion flames [16–18]. Besides, effects of different molecular diffusion models [9,10], initial gradient of fuel composition and strain rate [11,12,19, 20] on non-premixed ignition were also examined.
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This work was supported by the Army Research Office (DAAL03-90-G0-0220) under the technical monitoring of Dr. D. Mann.