- PII
- 10.31857/S0207401X24070071-1
- DOI
- 10.31857/S0207401X24070071
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume 43 / Issue number 7
- Pages
- 73-82
- Abstract
- Numerical simulations of autoignition of lean (6% H2), stoichiometric, and rich (90% H2) hydrogen–air mixtures have been performed to examine the influence of third-body efficiency (chaperon efficiency, CE) on the value of ignition delay, τ. The temperature ranges explored in the computations are 850–1000 K for P0 = 1 bar and 1000–1200 K for P0 = 6 bar. By using a detailed kinetic mechanism, it has been found that the sensitivity of ignition delay to CE is the highest for the reaction step H + O2 + M = HO2 + M, which can lead to a variation in τ by a factor of 2 to 3. A pressure increase or deviation from stoichiometry reduces the sensitivity. The influence of CE is qualitatively different and weaker for the reaction step OH + OH + M = H2O2 + M.
- Keywords
- водородно-воздушная смесь численное моделирование химическая кинетика задержка воспламенения детальный кинетический механизм эффективность по соударению с третьим телом
- Date of publication
- 15.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 5
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