Turbulent Flame Speed of a Gasoline surrogate in conditions representative of modern downsized Spark-Ignition engine

The downsized spark ignition (SI) engine is considered as one promising technology to reduce pollutants and greenhouse gas emissions. By boosting the intake air pressure, this operating mode achieves higher efficiency, thus reducing pollutant Modeling combustion process in these drastic conditions (high high temperature dilution rate) remains challenging, however, since most of models premixed turbulent seem insufficiently robust because regime might be out classical flamelet regime. Two different setups, a spherical vessel one-shot engine, were used study turbulence-flame interaction representative modern SI i.e. under controlled turbulence. Turbulent flame speed measured wide range Damkohler Karlovitz number. Several correlations from literature are also tested compared complete experimental dataset gathered on both setups.