Experimental and Numerical Studies of the Ignition of Ultralean and Lean Mixtures of Hydrogen with Air at Normal and Elevated Pressure.
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| Title: | Experimental and Numerical Studies of the Ignition of Ultralean and Lean Mixtures of Hydrogen with Air at Normal and Elevated Pressure. |
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| Authors: | Krivosheyev, P. N.1 (AUTHOR) krivosheyev.pavlik@gmail.com, Kisel, Yu. S.1 (AUTHOR), Skilond′, A. V.1 (AUTHOR), Tereza, A. M.2 (AUTHOR) |
| Source: | Journal of Engineering Physics & Thermophysics. Mar2026, Vol. 99 Issue 2, p508-515. 8p. |
| Subjects: | Lean combustion, Reaction mechanisms (Chemistry), Shock waves, Sensitivity analysis, Flame |
| Abstract: | The ignition of ultralean (φ = 0.1) and lean (φ = 0.5) mixtures of hydrogen with air in the temperature range of 895–1597 K and a pressure behind the reflected shock wave of 1 and 5 atm was studied experimentally. Numerical modeling of the concentration profiles of the electron-excited OH* radical was performed using several available and widely used detailed kinetic mechanisms (FFCM-2, AramcoMech 3.0, Tereza et al., Keromnes et al., and Konnov 2019). Good agreement (both quantitative and qualitative) between the experimentally observed and calculated ignition delay values τ was demonstrated. A sensitivity analysis was performed, and the key chemical reactions influencing the formation of τ were identified, and it was found out how the nature and degree of influence of these reactions change with increasing temperature and pressure. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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