LAUSR

The ignition delay for pure cyclohexane and two quaternary gasoline surrogate fuels CTRF1 (isooctane/n-heptane/toluene/cyclohexane, 37.070/11/40.076/11.854 by mole fraction), CTRF2 (isooctane/n-heptane/toluene/cyclohexane, 30.538/11/43.077/15.385 by mole fraction) with the same research octane number of 95 (RON = 95) in air is measured under lean, stoichiometric, and rich conditions behind reflected shock waves, at temperatures of 1027 K–1400 K, and pressures of 10, 15, and 19 bar/20 bar. To analyze the effects of exhaust gas recirculation upon ignition, CTRF1/air mixtures are diluted with CO2 to simulate different exhaust gas recirculation (EGR) loadings (0, 20%, 40%, and 60%). The experimental data are compared to the predictions calculated by a detailed chemical kinetic mechanism with 526 species and 2763 reactions generated in this work, which is also validated by the autoignition characteristics of pure cyclohexane, iso-octane, n-heptane, toluene, and their binary and ternary mixtures. The simulation...