Detailed Kinetics as a Tool for Investigating HCCI Conditions on Engine Performance and Emissions
Publication: Journal of Energy Engineering
Volume 142, Issue 2
Abstract
Homogeneous charge compression ignition (HCCI) combustion encompasses the advantages of both diesel and gasoline fuel engines. However, shortcomings mainly associated with the rapid pressure rise rate need to be studied in detail and account for the inherencies of each fuel mixture. The work numerically investigates the effect of key operating parameters on performance and pollutant characteristics on a widely investigated research engine. An accredited, detailed chemical kinetic mechanism for gasoline surrogate components, coupled with a sub-mechanism, is implemented on a commercial 0D single-zone engine model, in order to identify optimum performance guidelines regarding operating parameters using typical primary reference fuels. The effect of operated fuels, intake charge and exhaust gas recirculation (EGR) levels are discussed based on pressure traces, heat release rate profiles, combustion phasing analyses, and in-cylinder speciation and kinetic information. The work also explores the applicability and limitations of such an approach and investigates the extent to which a solid methodological approach based on detailed kinetic models could be helpful for gaining some chemical insight on the heat release and pollutant formation processes.
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Acknowledgments
Stimulating discussions with professors Alex Taylor and Yannis Hardaloupas from Imperial College London have provided strong motivation for this investigation. Financial support through the EU Marie Curie ITN ECCO-MATE project (Grant No. 607214) is gratefully acknowledged.
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Published In
Journal of Energy Engineering
Volume 142 • Issue 2 • June 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: May 11, 2015
Accepted: Sep 1, 2015
Published online: Dec 8, 2015
Discussion open until: May 8, 2016
Published in print: Jun 1, 2016
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