The autoignition of practical fuels at HCCI conditions: High-pressure shock tube experiments and phenomenological modeling

► Measured shock tube ignition delays for heptane and two kerosenes. ► Both kerosenes contain e.g. aromatics and cyclo-alkanes. ► Conditions tailored to those found in HCCI engines (lean, high EGR). ► Arrhenius correlation successfully describes first stage and main ignition delays. ► Correlation between fuel composition and ignition behavior identified.