Open Access
Oil & Gas Science and Technology - Rev. IFP
Volume 64, Number 4, July-August 2009
Page(s) 521 - 532
Published online 03 July 2009
Oil & Gas Science and Technology - Rev. IFP, Vol. 64 (2009), No. 4, pp. 521-532
DOI: 10.2516/ogst/2009001

Performance and Combustion Characteristics Analysis of HCCI Engine Operation with Diesel Like Fuels

Analyse de performance et caractéristiques de combustion du moteur HCCI avec les carburants similaires au gasoil

N. Shahangian1, M. Keshavarz1 and S.A. Jazayeri2

1  Iran Heavy Diesel Engine. Mfg.Co(DESA), Performance Analysis Department, 83 Vahid Dastgerdi St, Tehran - Iran
2  Khaje Nasir Toosi University of Technology, Pardis St, Vanaq Sq, Tehran - Iran

Published online: 3 July 2009

HCCI is considered a very promising solution to reduce engine pollutant emissions, however so far only experimental prototypes have been inspired by this concept. HCCI combustion of both DME and n-heptane fuels display a distinct two-stage ignition reaction with the first stage taking place at fairly low temperatures and the second stage taking place at high temperatures. The second stage is responsible for the main stage of the heat release process. In this study, a single-zone, zero-dimensional, thermo-kinetic combustion model has been developed. MATLAB software is used to predict engine performance characteristics of HCCI engines using two types of diesel fuel: Dimethyl ether and n-heptane. The effects of intake temperature and pressure, fuel loading and addition of EGR gases on auto-ignition characteristics, optimum combustion phasing, and performance of the HCCI engines are considered in this study.

La technologie HCCI est considérée comme une solution prometteuse pour réduire les émissions de polluants, mais seuls quelques prototypes expérimentaux exploitent ce concept. Dans la combustion HCCI de DME et n-heptane, on distingue deux phases de réaction d'allumage, la première à plutôt basse température et la deuxième à haute température. La seconde est responsable de l'essentiel des pertes thermiques. Dans cette étude, un modèle adimensionnel et thermocinétique de combustion à une zone est développé. Le logiciel MATLAB est utilisé pour prédire les caractéristiques des moteurs HCCI utilisant deux types de carburants diesel : le dimethylether et le n-heptane. Les effets de la température et de la pression d'admission, de la prise en charge des carburants et de l'addition des gaz EGR sur les caractéristiques de l'auto-allumage l'optimum de la combution et les performances des moteurs HCCI ont été considérés.

© IFP 2009

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