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Non-Linear Instabilities of Combustion Processes and Cycle-to-Cycle Variations in Spark-Ignition Engines
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Abstract
A numerical study was performed to elucidate the link between cyclic combustion variations in spark-ignition engines and instabilities in the non-linear processes occurring during the combustion. The instabilities in combustion were investigated by examining the response of a two-zone phenomenological combustion models to small deviations of mixture and flow conditions in the cylinder, such as the turbulence intensity at ignition, the overall equivalent ratio and the local equivalent ratio around the ignition site. The predicted combustion characteristics were validated and in good agreement with experimental data obtained from a single-cylinder research engine. The study suggested that the main deficiency of combustion in spark-ignition engines is the point-source ignition: it gives rise to slow development of initial flame; variations of the intermittent combustion process can occur when initial conditions at the ignition site are not repeatable from cycle to cycle. The instabilities in the initial flame can lead to significant variations in combustion parameters especially when the lean mixture limit is approached.
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Citation
Hu, Z., "Non-Linear Instabilities of Combustion Processes and Cycle-to-Cycle Variations in Spark-Ignition Engines," SAE Technical Paper 961197, 1996, https://doi.org/10.4271/961197.Also In
References
- Winsor, R.E. Patterson, D.J. Mixture Turbulence- a Key to Cyclic Combustion Variation SAE paper 730086 1973
- Patterson, D.J. Cylinder Pressure Variations, a Fundamental Combustion Problem SAE paper 660129 1966
- Young, M.B. Cyclic Dispersion in the Homogeneous-Charge Spark-Ignition Engine - A Literature Survey SAE paper 810020 1981
- Heywood, J.B. Internal Combustion Engines Fundamentals McGraw-Hill New York 1988
- Martin, J.K. Plee, S.L. Remboski, D.J. Burn Modes and Prior-Cycle Effects on Cyclic Variations in Lean-Burn Spark Ignition Engine Combustion SAE paper 880201 1988
- Daily J.W. Cycle-to-Cycle Variations: A Chaotic Process Comust. Sci. and Tech 1988 57 149 162
- Bates, S.C. Flame Imaging Studies of Cycle-by-Cycle Combustion Variation in a SI Four-Stroke Engine SAE paper 892086 1986
- Tabaczynski, R.J. Ferguson, C.R. Radhakrishnan, K. A Turbulent Entertainment Model for Spark-Ignition Engine combustion SAE paper 770647 1977
- Metghalchi, M. Keck, J.C. Burning Velocities of Mixtures of Air with Methanol, Iso-octane, and Indolene at High Pressure and Temperature Combust. Flame 1982 48 191 210
- Rhodes, D.B. Keck, J.C. Laminar Burning Speed Measurements of Indolene-Air-Diluent Mixtures at High Pressure and Temperatures SAE paper 850047 1985
- Pischinger S. Heywood J.B. A Model for Flame Kernel Development in a Spark-Ignition Engine Proceeding of 23rd Symp. (Int.) on Combustion 1990 1033 1040
- Mantel T. Three Dimensional Study of Flame Kernel Formation Around a Spark Plug SAE paper 920587 1992
- Hamai, K. Kawajiri, H. Ishizuka, T. Nakai, M. Combustion Fluctuation Mechanism Involving Cycle-to-Cycle Spark Ignition Variation due to Gas Flow Motion in SI Engines Proceeding of 21st Symp. (Int.) on Combustion 1986 505 512
- Enotiadis, A.C. Vafidis, C. Whitelaw, J.H. Interpretation of Cyclic Flow Variations in Motored Internal Combustion Engines Experiments In Fluids 1990 10 77 86
- Bradley, D Hyhes, J. Lawes, M Sheppard, C.G.W. Limitations to turbulence-enhanced burning rates in lean burn engines IMech E paper C46/88 1988
- Akindele, O.O. Bradley, D. Mak, P.W. McMahon, M. Spark Ignition of Turbulent Gases Combust. Flame 1982 47 129 155
- Gatowski, J.A. Heywood, J.B. Deleplace, C. Flame Photographs in a Spark Ignition Engine Combust. Flame 1984 56 71 81
- Date, T. Yagi, S. Research and Development of the Honda CVCC Engine SAE paper 740605 1974
- Arcoumanis, C. Hall, D.R. Whitelaw, J.H. An Approach to Charge Stratification in Lean-Burn, Spark-Ignition Engines SAE paper 941878 1994
- Dale, J.D. Oppenheim, A.K. Enhanced Ignition for I.C. Engines with Premixed Gases SAE paper 810146 1981