This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Modelling and Simulation of the Combustion of Ethanol blended Fuels in a SI Engine using a 0D Coherent Flame Model
Technical Paper
2009-24-0016
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Motor fuels are today increasingly blended with oxygenate components to reduce global CO2 emissions. Among these components, biomass-derived ethanol is very popular for spark ignition engine operation as it is not only a renewable source of energy, but it also allows to increase the engine power and thermal efficiency. Indeed, ethanol has the advantage of a high latent heat of vaporization leading to the so-called “cooling effect” which allows to increase the air-mass flow rate in the engine while reducing the charge temperature. This last property of ethanol combined with its high octane index make the engine less sensitive to knock. Then, although ethanol is characterised by high combustion speeds, optimal values of spark advance can be maintained on a larger range of engine operating conditions and high compression ratios as well as increased levels of downsizing can be used, all these aspects contributing to improve fuel consumptions.
However, the real potential of ethanol blended fuels still has to be explored and their impact on engine control strategies has to be investigated, especially considering the possible fuel composition variability during the engine life. Both issues can nowadays be addressed at low cost using system simulations of the whole engine, provided that the models used correctly account for the effect of the fuel composition on combustion processes.
This paper deals with the extension of a 0-dimensional coherent flame model to the combustion of ethanol blended gasoline for the simulation of heat release, knock and pollutants in SI engines. This extension mainly relies on the combination of a new laminar flame speed correlation, a modified set of chemical reactions in the flame front and an adapted correlation for the knock delay. The proposed developments are validated on a wide experimental database including many engine operating conditions as well as ethanol volume fractions ranging from 0% to 30%. Parametric variations in terms of spark advance and fuel/air ratio are also performed to compare optimal engine settings obtained from the simulations and at the engine bench. A good agreement is observed, showing the interest of using system simulations to predict the influence of the fuel composition on SI engines operation.
Recommended Content
| Technical Paper | A Review of Mixture Preparation and Combustion Control Strategies for Spark-Ignited Direct-Injection Gasoline Engines |
Authors
Topic
Citation
Bougrine, S., Richard, S., and Veynante, D., "Modelling and Simulation of the Combustion of Ethanol blended Fuels in a SI Engine using a 0D Coherent Flame Model," SAE Technical Paper 2009-24-0016, 2009, https://doi.org/10.4271/2009-24-0016.Also In
References
- Wiebe, I. “Halbempirische formel fur die verbrennungs-geschwindigkeit” Verlag der akademie der Wissenschaften der Vd SSR Moscow 1956
- Tabaczinski, R. Ferguson, C. Radhakrishnan, H. “A turbulent entrainment model for spark ignition engine combustion” SAE Paper 770647 1977
- Heywood, J. B. Higgins, J. Watts P. Tabaczinski, R. “Development and use of a cycle simulation to predict SI engine efficiency and NOx emissions” SAE paper 790291 1979
- Nakata, K. Utsumi, S. Ota, A. Kawatake, K. Kawai, T. Tsunooka, T. “The effect of ethanol fuel on a spark ignition engine” SAE paper 2006-01-3380 2006
- Kapus, P. E. Fuerhapter, A. Fuchs, H. Fraidl, G. K. “Ethanol direct injection on turbocharged SI engines-potential and challenges” SAE paper 2007-01-1408 2007
- Marriot, C. D. Wiles, M. A. Gwidt, J. M. Parrish, S. E. “Development of a naturally aspirated spark ignition direct-injection flex-fuel engine” SAE paper 2002-01-0839 2002
- Nakama, K. Kusaka, J. Daisho, Y. “Effect of ethanol on knock in spark ignition gasoline engines” JSAE 20084720-SAE paper 2008-32-0020 2008
- Starkman, E. S. Newhall, H. K. Sutton, R. R. “Comparative performance of alcohol and hydrocarbon fuels” SAE paper 640649 1964
- Brinkman, N. D. “Ethanol fuel : a single-cylinder engine study of efficiency and exhaust emissions” SAE paper 810345 1981
- Salih, F. M. Andrews, G. E. “The influence of gasoline/ethanol blends on emissions and fuel economy” SAE paper 922378 1992
- Castro, A. C. Koster, C. H. Franieck, E. K. “Flexible ethanol Otto engine management system” SAE paper 942400 1994
- Maji, S. Gajendra Babu, M. K. Gupta, N. “A single cylinder engine study of power, fuel and consumption and exhaust emissions with ethanol” SAE paper 2001-28-0029 2001
- Bayraktar, H. “Experimental and theoretical investigation of using gasoline-ethanol blends in spark-ignition engines” J. Renewable Energy 30 1733 1747 2005
- Gülder, L “Laminar burning velocities of methanol, ethanol, isooctane-air mixtures” Proc. Combust. Inst. 19 276 281 1982
- Gülder, L “Correlations of laminar combustion data for alternative SI engine fuels” SAE paper 841000 1984
- Hara, T Tanoue, K “Laminar flame speeds of ethanol, n-heptane, isooctane air mixtures” Fisita, F2006SC40 2006
- Farrell, J. T. Johnson, R. J. Androulakis, I. P. “Molecular structure effects on laminar burning velocities at elevated pressure and temperature” SAE paper 2004-01-2936 2004
- Karpov, V. P. Politenkova, G. G. Severin, E. S. “Turbulent combustion of alcohols” Comb. expl. and shock waves 22 4 397 399 1986
- Cowart, J. S. Boruta, W. E. “Powertrain development of the 1996 Ford flexible fuel taurus” SAE paper 952751 1995
- Stodart, A. Maher, J. Greger, J. Carlsson, J. “Fuel system development to improve cold start performance of a flexible fuel vehicle” SAE paper 982532 1998
- Pontoppidan, M. Bonfiglioli, S. Damasceno, F. Montanari, G. “Detailed study of ethanol in-cylinder combustion behavior by means of a numerical virtual engine model approach” SAE paper 2005-01-3989 2005
- Lafossas, F-A. Colin, O. Le Berr, F. Menegazzi, P. “Application of a new 1D combustion model to gasoline transient engine operation, ” SAE paper 2005-01-2107 2005
- Richard, S. Bougrine, S. Font, G. Lafossas, F-A. Le Berr, F. “On the reduction of a 3D CFD combustion model to build a physical 0D model for simulating heat release, knock and pollutants in SI engines” Oil & Gas Science & Technology 64 3 223 242 2009
- Colin, O. Benkenida, A. Angelberger, C. “A 3D Modeling of mixing, ignition and combustion phenomena in highly stratified gasoline engines” Oil & Gas Science & Tech. 58 47 62 2003
- Richard, S. Colin O. Vermorel, O. Benkenida, A. Angelberger, C. Veynante, D. “Towards large eddy simulation of combustion in spark ignition engines” Proc. Comb. Inst. 31 3059 3066 2007
- Vermorel, O. Richard, S. Colin, O. Benkenida, A. Angelberger, C. Veynante, D. “Multi-cycle LES simulations of flow and combustion in a PFI SI 4-valve production engine” SAE ( 2007-01-0151 ) – SAE transactions (J. of engines) 116 152 164 2007
- Metghalchi, M. Keck, J. C. “Burning velocities of mixtures of air with methanol, iso-octane and indolene at high pressure and temperature” Combust. Flame 48 191 210 1982
- Charlette, F. Meneveau, C. Veynante D. “A power-law flame wrinkling model for LES of premixed turbulent combustion” Combust. Flame 131 159 180 2002
- Blint, R. J. “ The relationship of the laminar flame width to flame speed” Combust. Sci. Technol 49 79 92 1986
- Meintjes, K. Morgan, A. P. General Motors research publications GMR-5827 1987
- Heywood, J. B. “Internal Combustion Engine Fundamentals” McGraw-Hill New York 450 490 1988
- Lafossas, F-A. Castagne M. Dumas, J-P. Henriot, S. “Development and validation of a knock model in spark ignition engines using a CFD-code” SAE paper 2002-01-2701 2002
- Albrecht, A. Corde, G Knop, V. Boie, H. Castagne, M. “1D simulation of turbocharged gasoline direct injection engine for transient strategy optimization” SAE paper 2005-01-0693 2005
- Woschni, G. “Universally applicable equation for the instantaneous heat transfer coefficient in the internal combustion engine” SAE paper 670931 1976
- Le Berr, F. Alix, G. Lafossas, F-A. Font, G. Corde, G Albrecht, A. “Powertrain simulation tools and application to the development of a SI engine concept car” SAE paper 2008-01-0356 2008