期刊
COMBUSTION AND FLAME
卷 140, 期 4, 页码 267-286出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2004.11.009
关键词
HCCI; homogeneous charge compression ignition; auto-ignition; fuel chemistry; primary reference fuels; n-heptane; toluene; co-oxidation; CHEMKIN
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. (c) 2004 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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