Article (Scientific journals)
Reduced chemical reaction mechanisms: experimental and HCCI modelling investigations of autoignition processes of iso-octane in internal combustion engines
Machrafi, Hatim; Lombaert, K.; Cavadias, S. et al.
2005In Fuel, 84 (18), p. 2330-2340
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Keywords :
autoignition; iso-octane; engine; HCCI
Abstract :
[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.
Disciplines :
Chemical engineering
Energy
Author, co-author :
Machrafi, Hatim 
Lombaert, K.
Cavadias, S.
Guibert, P.
Amouroux, J.
Language :
English
Title :
Reduced chemical reaction mechanisms: experimental and HCCI modelling investigations of autoignition processes of iso-octane in internal combustion engines
Publication date :
2005
Journal title :
Fuel
ISSN :
0016-2361
eISSN :
1873-7153
Publisher :
Elsevier Sci Ltd, Oxford, United Kingdom
Volume :
84
Issue :
18
Pages :
2330-2340
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 July 2011

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