This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Numerical Simulation of Autoignition of Gasoline-Ethanol/Air Mixtures under Different Conditions of Pressure, Temperature, Dilution, and Equivalence Ratio.
Technical Paper
2011-01-0341
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
A numerical simulation of autoignition of gasoline-ethanol/air mixtures has been performed using the closed homogeneous reactor model in CHEMKIN® to compute the dependence of autoignition time with ethanol concentration, pressure, temperature, dilution, and equivalence ratio. A semi-detailed validated chemical kinetic model with 142 species and 672 reactions for a gasoline surrogate fuel with ethanol has been used. The pure components in the surrogate fuel consisted of n-heptane, isooctane and toluene. The ethanol volume fraction is varied between 0 to 85%, initial pressure is varied between 20 to 60 bar, initial temperature is varied between 800 to 1200K, and the dilution is varied between 0 to 32% at equivalence ratios of 0.5, 1.0 and 1.5 to represent the in-cylinder conditions of a spark-ignition engine. The ignition time is taken to be the point where the rate of change of temperature with respect to time is the largest (temperature inflection point criteria). The results are validated against experimental data for pressures up to 60 bar. Since no experimental data on autoignition of multicomponent fuels at higher pressures is available to date, the results are extrapolated to 120 bar. The autoignition time is found to increase with ethanol concentration at lower temperatures but is found to decrease marginally at higher temperatures. The autoignition time is also found to decrease with pressure and equivalence ratio but increase with dilution. A correlation is proposed to calculate autoignition time of gasoline/air mixtures at varying ethanol concentrations, pressures, temperatures, dilution, and equivalence ratio that can be used in developing parametric burn rate and knock combustion models for engine simulation.
Recommended Content
Authors
Citation
Syed, I., Mukherjee, A., and Naber, J., "Numerical Simulation of Autoignition of Gasoline-Ethanol/Air Mixtures under Different Conditions of Pressure, Temperature, Dilution, and Equivalence Ratio.," SAE Technical Paper 2011-01-0341, 2011, https://doi.org/10.4271/2011-01-0341.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 |
Also In
References
- Grandin, B. Denbratt, I. “The Effect of Knock on Heat Transfer in SI Engines,” SAE Technical Paper 2002-01-0238 2002 10.4271/2002-01-0238
- Oppenheim, A. “The Knock Syndrome - Its Cures and Its Victims,” SAE Technical Paper 841339 1984 10.4271/841339
- Szwaja, S. et al. “Comparisons of hydrogen and gasoline combustion knock in a spark ignition engine,” International Journal of Hydrogen Energy 32 5076 5087 2007
- Heywood, J. B. “Internal Combustion Engine Fundamentals,” New York McGraw-Hill 1988 451 473
- Cooney, C. P. et al. “Combustion characterization in an internal combustion engine with ethanol - Gasoline blended fuels varying compression ratios and ignition timing,” Energy and Fuels 23 2319 2324 2009
- Machrafi, H. et al. “An experimental and numerical analysis of the HCCI auto-ignition process of primary reference fuels, toluene reference fuels and diesel fuel in an engine, varying the engine parameters,” Fuel Processing Technology 89 1007 1016 2008
- Cancino, L. R. et al. “Autoignition of gasoline surrogate mixtures at intermediate temperatures and high pressures: Experimental and numerical approaches,” Proceedings of the Combustion Institute 32 501 508 2009
- Chomiak, J. Srolo, J. “Fuel Effects on Energy Release and Knock Parameters in a SI Engine,” SAE Technical Paper 952404 1995 10.4271/952404
- Goldsborough, S. S. “A chemical kinetically based ignition delay correlation for iso-octane covering a wide range of conditions including the NTC region,” Combustion and Flame 156 1248 1262 2009
- Douaud, A. M. Eyzat, P. “Four-Octane-Number Method for Predicting the Anti-Knock Behavior of Fuels and Engines,” SAE Technical Paper 780080 1978 10.4271/780080
- Fikri, M. et al. “Autoignition of gasoline surrogates mixtures at intermediate temperatures and high pressures,” Combustion and Flame 152 276 281 2008
- Herzler, J. et al. “Shock-tube study of the autoignition of n-heptane/toluene/air mixtures at intermediate temperatures and high pressures,” Combustion and Flame 149 25 31 2007
- Kalghatgi, G. T. et al. “The nature of “superknock” and its origins in SI engines.,” IMechE meeting London 2009
- Viljoen, C. Yates, A. Swarts, A. Balfour, G. Moller, K. “An Investigation of the Ignition Delay Character of Different Fuel Components and an Assessment of Various Autoignition Modeling Approaches,” SAE Technical Paper 2005-01-2084 2005 10.4271/2005-01-2084
- Curran, H. J. et al. “A Comprehensive Modeling Study of n-Heptane Oxidation,” Combustion and Flame 114 149 177 1998
- Curran, H. J. et al. “A comprehensive modeling study of iso-octane oxidation,” Combustion and Flame 129 253 280 2002
- Battin-Leclerc, F. et al. “Modeling of the gas-phase oxidation of n-decane from 550 to 1600 K,” Proceedings of the Combustion Institute 28 1597 1605 2000
- Warth, V. et al. “Computer based generation of reaction mechanisms for gas-phase oxidation,” Computers & Chemistry 24 541 560 2000
- Ranzi, E. et al. “A wide-range modeling study of iso-octane oxidation,” Combustion and Flame 108 24 42 1997
- Ranzi, E. et al. “A wide-range modeling study of n-heptane oxidation,” Combustion and Flame 103 91 106 1995
- Machrafi, H. Cavadias, S. “Three-stage autoignition of gasoline in an HCCI engine: An experimental and chemical kinetic modeling investigation,” Combustion and Flame 155 557 570 2008
- Andrae, J. C. G. Head, R. A. “HCCI experiments with gasoline surrogate fuels modeled by a semidetailed chemical kinetic model,” Combustion and Flame 156 842 851 2009
- Dagaut, P. Casimir, T. “Experimental and Modeling Study of the Kinetics of Oxidation of Ethanol-Gasoline Surrogate Mixtures (E85 Surrogate) in a jet-Stirred Reactor.,” Energy and Fuels 22 3499 3505 2008
- Habik, S. E.-D. et al. “Developed Reduced Reaction Mechanisms for Practical High Hydrocarbon Fuels,” Combustion Science and Technology 148 93 133 1999
- Milpied, J. Jeuland, N. Plassat, G. Guichaous, S. et al. “Impact of Fuel Properties on the Performance and Knock Behaviour of a Downsized Turbocharged DI SI Engine - Focus on Octane Numbers and Latent Heat of Vaporization,” SAE Int. J. Fuels Lubr. 2 1 118 126 2009 10.4271/2009-01-0324
- Gulder, O. L. “Laminar Burning Velocities of Methanol, Ethanol and Iso-octane-Air Mixtures.,” Proceedings of the Combustion Institute 19 275 281 1982
- Takashi, H. kimitoshi, T. “Laminar Flame Speeds of Ethanol, n-heptane, Iso-octane Air Mixtures.,” the International federation of Automotive Engineering Societies 2006
- Yeliana, Y. Cooney, C. Worm, J. Naber, J. “The Calulation of Mass Fraction Burn of Ethanol-Gasoline Blended Fuels Using Single and Two Zone Models,” SAE Technical Paper 2008-01-0320 2008 10.4271/2008-01-0320
- Machrafi, H. et al. “An experimental and numerical investigation on the influence of external gas recirculation on the HCCI autoignition process in an engine: Thermal, diluting, and chemical effects,” Combustion and Flame 155 476 489 2008
- Syed, I. Yeliana, Y. Mukherjee, A. Naber, J. Michalek, D. “Numerical Investigation of Laminar Flame Speed of Gasoline - Ethanol/Air Mixtures with Varying Pressure, Temperature and Dilution,” SAE Int. J. Engines 3 1 517 528 2010 10.4271/2010-01-0620
- Ciezki, H. K. Adomeit, G. “Shock-tube investigation of self-ignition of n-heptane-air mixtures under engine relevant conditions,” Combustion and Flame 93 421 433 1993
- Jerzembeck, S. et al. “Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation,” Combustion and Flame 156 292 301 2009
- He, X. et al. “An experimental and modeling study of iso-octane ignition delay times under homogeneous charge compression ignition conditions,” Combustion and Flame 142 266 275 2005
- Kee, R. F. M. R.J. Miller, J.A. Coltrin, M.E. Grcar, J.F. Meeks, E. Moffat, H.K. Lutz, A.E. Dixon-Lewis, G. Smooke, M.D. Warnatz, J. Evans, G.H. Larson, R.S. Mitchell, R.E. Petzold, L.R. Reynolds, W.C. Caracotsios, M. Stewart, W.E. Glarborg, P. Wang, C. McLellan, C.L. Adigun, O. Houf, W.G. Chou, C.P. Miller, S.F. Ho, P. Young, P.D. Young, D.J. Hodgson, D.W. Petrova, M.V. Puduppakkam, K.V. “CHEMKIN Release” 4.1.1, ed Reaction Design 2007
- Andrae, J. C. G. et al. “Autoignition of toluene reference fuels at high pressures modeled with detailed chemical kinetics,” Combustion and Flame 149 2 24 2007
- Davidson, D. F. et al. “Shock tube measurements of iso-octane ignition times and OH concentration time histories,” Proceedings of the Combustion Institute 29 1295 1301 2002
- Gauthier, B. M. et al. “Shock tube determination of ignition delay times in full-blend and surrogate fuel mixtures,” Combustion and Flame 139 300 311 2004
- Edwards, C. Siebers, D. Hoskin, D. “A Study of the Autoignition Process of a Diesel Spray via High Speed Visualization SAE Technical Paper 920108 1992 10.4271/920108
- Bradley, D. Head, R. A. “Engine autoignition: The relationship between octane numbers and autoignition delay times,” Combustion and Flame 147 171 184 2006
- Duchaussoy, Y. Barbier, P. Schmelzle, P. “Impact of Gasoline RON and MON on a Turbocharged MPI SI Engine Performances,” SAE Technical Paper 2004-01-2001 2004 10.4271/2004-01-2001
- Moran, D. P. “Fuel Evaporation and the High-Speed Knock Phenomenon of Methanol-Gasoline Blended Fuels,” SAE Technical Paper 942063 1994 10.4271/942063
- Selvam, R. P. Sarkar, M. Ponnappan, R. “Effect of Thermal Conductivity and Latent Heat of Vaporization of Liquid on Heat Transfer in Spray Cooling,” SAE Technical Paper 2006-01-3068 2006 10.4271/2006-01-3068
- Rouse, B. “Part Load Combustion Characterization of Ethanol-Gasoline Fuel blends in a Single Cylinder Spark Ignition Direct Injection Variable Cam Timing Variable Compression Ratio Engine” M.S, Mechanical Engineering-Engineering Mechanics Michigan Technological University Houghton 2009
- Heywood, J. B. “Internal Combustion Engine fundamentals,” New York McGraw-Hill 1988 130 135
- Borman, G. L. Ragland, K. W. “Combustion Engineering,” WCB/McGraw_Hill 1998 94 96