Laminar flame speeds and oxidation kinetics of iso-octane-air and n-heptane-air flames

摘要: Laminar flame speeds of iso-octane-air and n-heptane-air mixtures were determined experimentally over an extensive range equivalence ratios at room temperature atmospheric pressure, employing the counterflow twin configuration. Using both linear nonlinear extrapolations, effect stretch was minimized by extrapolating reference speed to vanishing stretch, with nonlinearly extrapolated values being typically 2 cm/s smaller. The laminar iso-octane found be lower than those n-heptane throughout experimental ratios. Predictions, using a detailed kinetic model based on works Held et al, Curran, Pitz., Westbrook, agreed quite well data, especially lean ratios, while yielding somewhat stoichiometric rich Since kinetics in previously compared flow-reactor present also oxidation experiment. accurately predicted fuel decay profile as propene iso-butene, which are two major intermediates formed initially conditions. analysis suggests that high-temperature reaction pathways proposed Curran al describe indicates development comprehensive requires additional studies iso-butene.