Kinetic effects of methyl radicals on PRF lean ignition: a comparative study of skeletal mechanisms
| Autor: | Yohan Blacodon, Ernesto Sandoval, André Nicolle, Romain Aloy, Myriam Belmekki |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Chemical Engineering Radical Kinetics General Physics and Astronomy Energy Engineering and Power Technology Thermodynamics 02 engineering and technology Combustion 01 natural sciences law.invention chemistry.chemical_compound 020401 chemical engineering law 0103 physical sciences Reactivity (chemistry) Physics::Chemical Physics 0204 chemical engineering 010304 chemical physics Methyl radical General Chemistry Ignition system Fuel Technology chemistry Scientific method Stoichiometry |
| Zdroj: | Combustion and Flame. 232:111547 |
| ISSN: | 0010-2180 |
| DOI: | 10.1016/j.combustflame.2021.111547 |
| Popis: | Despite considerable achievements of combustion kinetics, the chemical kinetic impacts of trace promoting species on practical fuel combustion has been hitherto handled seperately either as ignition or extinction-related effects, overlooking the impact of the extinction process on re-ignition kinetics. We herein demonstrate the applicability of oscillatory stirred reactor configuration to quantify the combined impacts of the methyl radical on ignition/extinction of primary reference fuels (PRF) in stoichiometric and ultra-lean conditions, thereby complementing steady-state configurations for kinetic mechanism validation. A new convenient reactivity metric is proposed based on the matching of temperature Fourier spectrum of additivated fuels with corresponding PRF. Using a new skeletal mechanism obtained from calibration on a variety of ignition experiments, we characterize ignition regimes by CEMA analysis and highlight the key reactions of the C1-C3 reaction subsets that should be included in minimal skeletal mechanisms used in reactive CFD modeling to properly describe re-ignition phenomena over a variety of new combustion applications involving methyl radical injection. |
| Databáze: | OpenAIRE |
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