Reference : Reduced chemical reaction mechanisms: experimental and HCCI modelling investigations ...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Energy
Reduced chemical reaction mechanisms: experimental and HCCI modelling investigations of autoignition processes of iso-octane in internal combustion engines
Machrafi, Hatim mailto [> > > >]
Lombaert, K. [> > > >]
Cavadias, S. [> > > >]
Guibert, P. [> > > >]
Amouroux, J. [ > > ]
Elsevier Sci Ltd
Yes (verified by ORBi)
United Kingdom
[en] autoignition ; iso-octane ; engine ; HCCI
[en] A semi-reduced (70 species, 210 reactions) and a skeletal (27 species, 29 reactions) chemical reaction mechanism for iso-octane are constructed from a semi-detailed iso-octane mechanism (84 species, 412 reactions) of the Chalmers University of Technology in Sweden. The construction of the reduced mechanisms is performed by using reduction methods such as the quasi-steady-state assumption and the partial equilibrium assumption. The obtained reduced iso-octane mechanisms show, at the mentioned conditions, a perfect coherence with another more detailed iso-octane mechanism of ENSIC-CNRS (2411 reactions and 473 species) and the semi-detailed iso-octane mechanism of Chalmers. The validity of this mechanism with regard to the ignition delay is determined for several engine parameters adhering to HCCI conditions: inlet temperature (303-363 K), equivalence ratio (0.2-0.7) and compression ratio (10-16). The ignition delay is found to be decreased by an increase in the inlet temperature, a decrease in the equivalence ratio and an increase in the compression ratio. In order to validate the effects of the inlet temperature, compression ratio on the auto-ignition delay, experiments are performed on a CFR engine. A good agreement is obtained between experimental results and calculations. (c) 2005 Elsevier Ltd. All rights reserved.
Researchers ; Students

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