Abstract
We have performed the chemical kinetic simulations for multi-fuel HCCI combustion with alkane, alcohol and ether. Sub fuels were added at premixed conditions and after low temperature oxidation. From the analysis using contribution matrix, the ingition delay times of neat and multi-fuel depend on heat release by H2O2 Loop. For alcohol oxidation, the reaction of HO2 with fuel inhibits the heat release by H2O2 loop. The mixing effects of fuels appear in the H2O2 and CH2O concentrations those related to heat release by H2O2 Loop and the concentrations of these species are mainly from lower octane number fuel. Thus the larger variation of ignition delay times can be attained with premixed mixtures between higer octane number main fuel and lower octane number sub fuel.
