Single Zone Model for HCCI Engine Fueled with n-Heptane

In this study, we developed a model to predict the temperature and the pressure variation in an internal combustion engine operated in HCCI (Homogeneous charge compression ignition) mode. HCCI operation begins from aspirating of homogeneous charge mixture through intake valve like SI (Spark ignition) engine and the premixed charge is compressed until temperature and pressure of mixture reach autoignition point like diesel engine. Combustion phase was described by double-Wiebe function. The single zone model coupled with an double-Wiebe function were performed to simulated pressure and temperature between the period of IVC (Inlet valve close) and EVO (Exhaust valve open). Mixture gas properties were implemented using STANJAN and transfer the results to main model. The model has considered the engine geometry and enables varying in fuelling, equivalence ratio, manifold temperature and pressure. The results were compared with the experiment and showed good correlation with respect to combustion phasing, pressure rise, peak pressure and temperature. This model could be adapted and use to control start of combustion for HCCI engine.




References:
[1] Yi-Hann Chen and Jyh-Yuan Chen, "Experiment Exploration of HCCI
for KYMCO 100cc Two-Stroke Gasoline Engine," Journal of the Chinese
Society of Mechanical Engineers, Vol.25, No.2, pp.165-174, 2004.
[2] Junjun Ma, Xingcai L├╝, Libin Ji, and Zhen Huang, "An experimental
study of HCCI-DI combustion and emissions in a diesel engine with dual
fuel," International Journal of Thermal Sciences 47, pp.1235-1242, 2008.
[3] Xingcai L├╝, Libin Ji, Linlin Zu, Yuchun Hou, Cheng Huang, and Zhen
Huang, "Experimental study and chemical analysis of n-heptane
homogeneous charge compression ignition combustion with port
injection of reaction inhibitors," Combustion and Flame 149 pp. 261-270,
2007.
[4] Stephen R. Turn, "An Introduction to Combustion: Concepts and
Applications," 2nd edition, McGRAW-HILL companies, Inc.,
international editions, Singapore, 2000.
[5] C. Stuart Daw, Robert M. Wagner, K. Dean Edwards, and Johney B.
Green Jr., "Understanding the transition between conventional
spark-ignited combustion and HCCI in a gasoline engine;" Proceedings of
the Combustion Institute 31 (2007) pp. 2887-2894.
[6] Sjoberg, M, and Dec, J.E., "Comparing late-cycle autoignition stability
for single- and two-stage ignition fuels in HCCI engines," Proceedings of
the combustion institute 31, pp.2895-2902, 2006
[7] Alex C. Alkidas., Combustion advancements in gasoline engines. Energy
Conversion and Management 48, pp.2751-2761, 2007.
[8] A. Tsolakis, A. Megaritis, D. Yap., Application of exhaust gas fuel
reforming in diesel and homogeneous charge compression ignition
(HCCI) engines fuelled with biofuels. Energy 33, pp.462-470, 2008.
[9] H. T. Aichlmayr, D. B. Kittelson, M. R. Zachariah, "Miniature free-piston
homogeneous charge compression ignition engine-compressor concept-
Part I: performance estimation and design considerations unique to small
dimensions," Chemical Engineering Science 57, pp.4161-4171, 2002.
[10] Quintero H.F., Romero C.A., and Vanegas Useche L.V.
"Thermodynamic and dynamic analysis of an internal combustion engine
with a noncircular-gear based modified crank-slider mechanism," 12th
IFToMM World Congress, Besançon (France), June18-21, 2007.
[11] Ramos J.I., Internal Combustion Engine Modeling. Hemisphere
Publishing Corporation, New York, 1989.
[12] Soylu S., "Examination of combustion characteristics and phasing
strategies of a natural gas HCCI engine," Energy Conversion and
Management 46, pp.101-119, 2005.
[13] Killingsworth N.J., Aceves S.M., Flowers D.L., and Krsic, M., "A simple
HCCI engine model for control," Proceedings of the 2006 IEEE,
International Conference on Control Applications, Munich, Germany,
Oct 4-6, 2006.
[14] Sun F., Chen X., Ting D.S.K., and Sobiesiak A., "Modeling operation of
HCCI engines fueled with Ethanol," 2005 American Control Conference,
June 8-10, pp.1003-1009, 2005.
[15] Chiang C.J. and Stefanopoulou A.G., "Sensitivity Analysis of
Combustion Timing and Duration of Homogeneous Charge Compression
Ignition (HCCI) Engines," Proceedings of the 2006 American Control
Conference, Minneapolis, Minnesota, USA, June 14-16, pp.1857-1862,
2006.
[16] Moran, M.J. and Shapiro H.N., Fundamental Engineering of
Thermodynamics. 5th edition. John Wiley & Sons, Inc. USA.
[17] Yasar, H.,Soyhan, H.S., Walmsley, H., Head, B., Sorusbay, B.,
"Double-Wiebe function: An approach for single-zone HCCI engine
modeling," Applied Thermal Engineering 28, pp.1284-1290, 2008.
[18] Soyhan H.S., Yasar H., Walmsley H., Head B., Kalghatgi G.T. and
Sorusbay C., "Evaluation of heat transfer correlations for HCCI engine
modeling," Applied Thermal Engineering 29 pp.541-549, 2009.