Modeling Soot Formation Using Reduced Polycyclic Aromatic Hydrocarbon Chemistry in n-Heptane Lifted Flames With Application to Low Temperature Combustion

摘要: A numerical study of in-cylinder soot formation and oxidation processes in n-heptane lifted flames using various inception species has been conducted. In a recent by the authors, it was found that growth regions were not adequately represented acetylene alone as species. Comparisons with conceptual model available experimental data suggested location could be better if polycyclic aromatic hydrocarbon (PAH) considered alternatives to for processes. Since local temperatures are much lower under low temperature combustion conditions, is believed significant mass contribution can attributed PAH rather than acetylene. To quantify validate above observations, reduced chemistry mechanism extended include up four fused rings (pyrene). The resulting integrated into multidimensional computational fluid dynamics code KIVA-CHEMKIN modeling constant volume chamber. investigation revealed simpler only considers phenanthrene (three rings) good possibilities predictions. present work highlights illustrates research challenges toward accurate qualitative quantitative predictions new emission strategies internal engines.