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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.
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]
Copyright of Journal of Engineering Physics & Thermophysics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193684734
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PubType: Academic Journal
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  Data: 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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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Engineering+Physics+%26+Thermophysics%22">Journal of Engineering Physics & Thermophysics</searchLink>. Mar2026, Vol. 99 Issue 2, p508-515. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Lean+combustion%22">Lean combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Reaction+mechanisms+%28Chemistry%29%22">Reaction mechanisms (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Shock+waves%22">Shock waves</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Flame%22">Flame</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Engineering Physics & Thermophysics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10891-026-03330-3
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        Text: English
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        Type: general
      – SubjectFull: Reaction mechanisms (Chemistry)
        Type: general
      – SubjectFull: Shock waves
        Type: general
      – SubjectFull: Sensitivity analysis
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      – TitleFull: 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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              Text: Mar2026
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              Y: 2026
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