N-decane-air end-gas auto-ignition induced by flame propagation in a constant volume chamber: Influence of compression history
| Autor: | Hugo Quintens, Camille Strozzi, Ratiba Zitoun, Marc BELLENOUE |
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| Přispěvatelé: | Bellenoue, Marc, Institut Pprime (PPRIME), Université de Poitiers-ENSMA-Centre National de la Recherche Scientifique (CNRS) |
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| Zdroj: | HAL 8th european combustion meeting 8th european combustion meeting, Apr 2017, Dubrovnik, Croatia |
| Popis: | International audience; The present study aims at characterizing the end-gas auto-ignition of n-decane – air mixtures induced by a flame propagation in a constant volume chamber. A numerical tool is developed, and the study is first focused on academic compressions, e.g. at constant rate of pressure rise. Thermodynamic conditions of transition from deflagration to auto-ignition are first determined, and the involved physical processes are highlighted. A square section combustion chamber is then employed: a deflagration front is initiated at high pressure (2-5 bar) and low temperature (425 K) at the top of the chamber. As it propagates downwards, auto-ignition can occur near the end wall depending on the conditions. The end-gas compression and auto-ignition phenomenon are numerically modelled. The study confirms the strong influence of compression history on the auto-ignition delay values. |
| Databáze: | OpenAIRE |
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