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Numerical Investigation of Laminar Burning Velocities of High Octane Fuel Blends Containing Ethanol
Technical Paper
2009-01-0935
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Recently, fuels containing ethanol have become more and more important for spark ignition engines. Fuels with up to 10 vol.-% ethanol can be used in most spark ignition engines without technical modification. These fuels have been introduced in many countries already. Alternatively, for fuels with higher amounts of ethanol so called flex fuel vehicles (FFV) exist.
One of the most important quantities characterizing a fuel is the laminar burning velocity. To account for the new fuels with respect to engine design, reliable data need to be existent. Especially for engine simulations, various combustion models have been introduced which rely on the laminar burning velocity as the physical quantity describing the progress of chemical reactions, diffusion, and heat conduction. However, there is very few data available in the literature for fuels containing ethanol, especially at high pressures.
A detailed chemical kinetic mechanism for iso-octane, n-heptane, and ethanol is used to calculate laminar burning velocities under engine relevant conditions. The results are validated against data from literature and new experimental measurements using the closed-vessel bomb method. Finally, based on the results obtained, the effect of ethanol blended to standard fuels is analyzed.
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Röhl, O., Jerzembeck, S., Beeckmann, J., and Peters, N., "Numerical Investigation of Laminar Burning Velocities of High Octane Fuel Blends Containing Ethanol," SAE Technical Paper 2009-01-0935, 2009, https://doi.org/10.4271/2009-01-0935.Also In
References
- Al-Farayedhi, A.A. Al-Dawood, A.M. Gand-hidasan P. Effects of blending crude ethanol with unleaded gasoline on exhaust emissions of SI engine SAE Paper, 2000-01-2857 2000
- Curran, H.J. Gaffuri, P. Pitz, W.J. West-brook C.K. A comprehensive modeling study on iso-octane oxidation Combustion and Flame 129 253 280 2002
- D’Ornellas. C.V. The effect of ethanol on gasoline oxidation stability SAE Paper, 2001-01-3582 2001
- Egolfopoulos, F.N. Du, D.X. Law. C.K. A study on ethanol oxidation kinetics in laminar premixed flames, flow reactors, and shock tubes Symposium (International) on Combustion 24 1 833 841 1992
- Gülder. Ö.L. Laminar burning velocities of methanol, ethanol and isooctane-air mixtures Symposium (International) on Combustion 19 1 275 281 1982
- Hsieh, Wei-Dong Chen, Rong-Hong Wu, Tsung-Lin Lin Ta-Hui Engine performance and pollutant emission of an SI engine using ethanol-gasoline blended fuels Atmospheric Environment 36 3 403 410 2002
- Jerzembeck S. Peters. N. Measurement of laminar flame velocity and markstein length for standard gasoline and a corresponding reference fuel mixture (PRF87) SAE Paper, 2007-01-2006 2007
- Jerzembeck, S. Peters, N. Pepiot-Desjardins, P. Pitsch. H. Laminar burning velocities at high pressure for primary reference fuels and gasoline: Experimental and numerical investigation Combustion and Flame 156 2 292 301 2009
- Jerzembeck, S. Röhl, O. Glawe, C. Peters N. www.itv.rwth-aachen.de/fileadmin/downloadbereich/prfethanol.zip
- Jerzembeck, S. Röhl, O. Glawe, C. Peters N. Thirty-Second Sympsoium (international) on Combustion The Combustion Institute 2008
- Marinov. N.M. A detailed chemical kinetic model for high temperature ethanol oxidation Int. J. Chem. Kinet. 31 183 220 1999
- Metghalchi Mohamad Keck James C. Burning velocities of mixtures of air with methanol, isooc-tane, and indolene at high pressure and temperature Combustion and Flame 48 191 210 1982
- Müller, U. C. Bollig, M. Peters. N. Approxima-tions for burning velocities and markstein numbers for lean hydrocarbon and methanol flames Combustion and Flame 108 3 349 356 1997
- Otsu. N. A threshold selection method from gray-level histograms IEEE Transaction on systems management and cybernetics 9 62 69 1979
- Peters. N. Turbulent Combustion Cambridge University Press Cambridge 2000
- Peters N. Williams. F. Asymptotic structure of stoichiometric methane-air flames Combust. Flame 68 833 840 1987
- Rudolph T.W. Thomas. J.J. NOx, NMHC and CO emissions from biomass derived gasoline extenders Biomass 16 33 49 1988
- Sandquist, H. Karlsson, M. Denbratt. I. Influ-ence of ethanol content in gasoline on speciated emissions from a direct injection stratified charge SI engine SAE Paper, 2001-01-1206 2001