Development of a detailed kinetic model for gasoline surrogate fuels

• A detailed chemical kinetic model to describe the autoignition of gasoline surrogate fuels is presented consisting of the fuels isooctane, n-heptane, toluene, diisobutylene and ethanol. Model predictions have been compared with shock tube ignition delay time data for surrogates of gasoline over practical ranges of temperature and pressure, and the model has been found to be sensitive to both changes in temperature and pressure. Moreover, the model can qualitatively predict the observed synergistic and antagonistic non-linear blending behaviour in motor octane number (MON) for different combinations of primary reference fuels (PRFs) and non-PRFs by correlating calculated autoignition delay times from peak pressures and temperatures in the MON test to experimental MON values. The reasons for the blending behaviour are interpreted in terms autoignition chemistry.

Nyckelord

autoignition

surrogate fuels

gasoline

diisobutylene

ethanol

shock-tube

high-pressures

combustion systems

chemical-kinetics

octane numbers

delay times

ignition

autoignition

oxidation

mixtures

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)