Cooxidation in the auto-ignition of primary reference fuels and n-heptane/toluene blends
2005 (English)In: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 140, no 4, 267-286 p.Article in journal (Refereed) Published
Auto-ignition of fuel mixtures was investigated both theoretically and experimentally to gain further understanding of the fuel chemistry. A homogeneous charge compression ignition (HCCI) engine was run under different operating conditions with fuels of different RON and MON and different chemistries. Fuels considered were primary reference fuels and toluene/n-heptane blends. The experiments were modeled with a single-zone adiabatic model together with detailed chemical kinetic models. In the model validation, co-oxidation reactions between the individual fuel components were found to be important in order to predict HCCI experiments, shock-tube ignition delay time data, and ignition delay times in rapid compression machines. The kinetic models with added co-oxidation reactions further predicted that an n-heptane/toluene fuel with the same RON as the corresponding primary reference fuel had higher resistance to auto-ignition in HCCI combustion for lower intake temperatures and higher intake pressures. However, for higher intake temperatures and lower intake pressures the n-heptane/toluene fuel and the PRF fuel had similar combustion phasing.
Place, publisher, year, edition, pages
2005. Vol. 140, no 4, 267-286 p.
HCCI, homogeneous charge compression ignition, auto-ignition, fuel chemistry, primary reference fuels, n-heptane, toluene, co-oxidation, CHEMKIN
IdentifiersURN: urn:nbn:se:kth:diva-7570DOI: 10.1016/j.combustflame.2004.11.009ISI: 000227865300003ScopusID: 2-s2.0-14744268733OAI: oai:DiVA.org:kth-7570DiVA: diva2:12637
QC 201011092007-11-062007-11-062010-12-20Bibliographically approved