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Chemistry-Based Laminar Flame Speed Correlations for a Wide Range of Engine Conditions for Iso-Octane, n-Heptane, Toluene and Gasoline Surrogate Fuels
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 08, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
CFD simulations of reacting flows are fundamental investigation tools used to predict combustion behaviour and pollutants formation in modern internal combustion engines. Focusing on spark-ignited units, most of the flamelet-based combustion models adopted in current simulations use the fuel/air/residual laminar flame propagation speed as a background to predict the turbulent flame speed. This, in turn, is a fundamental requirement to model the effective burn rate.
A consolidated approach in engine combustion simulations relies on the adoption of empirical correlations for laminar flame speed, which are derived from fitting of combustion experiments. However, these last are conducted at pressure and temperature ranges largely different from those encountered in engines: for this reason, correlation extrapolation at engine conditions is inevitably accepted. As a consequence, relevant differences between proposed correlations emerge even for the same fuel and conditions. The lack of predictive chemistry-grounded correlations leads to a wide modelling uncertainty, often requiring an extensive model tuning when validating combustion simulations against engine experiments.
In this paper a fitting form based on fifth order logarithmic polynomials is applied to reconstruct correlations for a set of Toluene Reference Fuels (TRFs), namely iso-octane, n-heptane, toluene and for a commercial gasoline fuel surrogate. Experimental data from literature are collected as well as existing computations for laminar flame speed. These last are extended up to full-load engine-relevant conditions, where experiments are not available; they constitute a model-based prediction of flame behaviour at such states. The mentioned literature and calculated data, which are shown to be representative of a wide range of engine-typical operating points, constitute the target values for the fitting polynomials.
The model-based correlations of this study constitute a reference to increase the accuracy of flamelet combustion simulations, and to reduce the modelling approximations when dealing with full-load engine operations.
- Alessandro D'Adamo - Universita di Modena e Reggio Emilia
- Marco Del Pecchia - Universita di Modena e Reggio Emilia
- Sebastiano Breda - Universita di Modena e Reggio Emilia
- Fabio Berni - Universita di Modena e Reggio Emilia
- Stefano Fontanesi - Universita di Modena e Reggio Emilia
- Jens Prager - Siemens PLM Software
CitationD'Adamo, A., Del Pecchia, M., Breda, S., Berni, F. et al., "Chemistry-Based Laminar Flame Speed Correlations for a Wide Range of Engine Conditions for Iso-Octane, n-Heptane, Toluene and Gasoline Surrogate Fuels," SAE Technical Paper 2017-01-2190, 2017, https://doi.org/10.4271/2017-01-2190.
Data Sets - Support Documents
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- Colin O., Benkenida A. (2004) The 3-Zone Extended Coherent Flame Model (ECFM3Z) for computing premixed/diffusion combustion, Oil Gas Sci. Technol. -Rev. IFP 59, 6, 593-609.
- Metghalchi, M., Keck, J.C., “Burning velocities of mixtures of air with methanol, isooctane, and indolene at high pressure and temperature” Combustion and Flame, Vol. 48(1982), pp. 191-210.
- Gulder, O., “Laminar Burning Velocities of Methanol, Ethanol, and Isooctane-Air Mixtures,” Combustion Institute, 1982/pp. 275-281.
- Peters, N., “Turbulent Combustion,” Cambridge University Press, 2000.
- Damkohler, G., “The Effect of Turbulence on the Flame Velocity in Gas Mixtures, “NACA TM 1112, 1947.
- Abdel-Gayed, R.G., Bradley, D., Lawes, M., “Turbulent burning velocities: a general correlation in terms of straining rates,” Proc. R. Soc. Lond. A 414, 389-413 (1987)
- Bradley, D., Lau, A.K.C., Lawes, M., “Flame stretch rate as a determinant of turbulent burning velocity,” Phil. Trans. R. Soc. Lond. A (1992) 338, 359-387.
- Rhodes, D. and Keck, J., "Laminar Burning Speed Measurements of Indolene-Air-Diluent Mixtures at High Pressures and Temperatures," SAE Technical Paper 850047, 1985, doi:10.4271/850047.
- Gillespie, L., Lawes, M., Sheppard, C., and Woolley, R., "Aspects of Laminar and Turbulent Burning Velocity Relevant to SI Engines," SAE Technical Paper 2000-01-0192, 2000, doi:10.4271/2000-01-0192.
- Xiouris, C., Ye, T., Jayachandran, J., Egolfopoulos, F., “Laminar flame speeds under engine-relevant conditions: Uncertainty quantification and minimization in spherically expanding flame experiments,” Combustion and Flame 163 (2016) 270-283
- Lawes, M., Ormsby, M.P., Sheppard, C.G.W. and Woolley, R. “Variation of turbulent burning rate of methane, methanol, and iso-octane air mixtures with equivalence ratio at elevated pressure,” Comb. Sc. and Techn., 177 (7). pp. 1273-1289 (2005).
- Wang, C-H., Ueng, G-J., Tsay, M-S., “An Experimental Determination of the Laminar Burning Velocities and Extinction Stretch Rates of Benzene/Air Flames,” COMBUSTION AND FLAME 113:242-248 (1998).
- Johnston, R.J., Farrell, J.T., “Laminar burning velocities and Markstein lengths of aromatics at elevated temperature and pressure,” Proceedings of the Combustion Institute 30 (2005) 217-224.
- Gu, X., Huang, Z., Li, Q., Tang, G., “Measurements of Laminar Burning Velocities and Markstein Lengths of n-Butanol-Air Premixed Mixtures at Elevated Temperatures and Pressures,” Energy Fuels 2009, 23, 4900-4907 : DOI:10.1021/ef900378s
- Varea, E., Modica, V., Renou, B., Boukhalfa, A.M., “Pressure effects on laminar burning velocities and Markstein lengths for Isooctane-Ethanol-Air mixtures,” Proceedings of the Combustion Institute 34 (2013) 735-744
- Sileghem, L., Alekseev, V.A., Vancoillie, J., Van Geem, K.M., et al, “Laminar burning velocity of gasoline and the gasoline surrogate components iso-octane, n-heptane and toluene,” Fuel 112 (2013) 355-365.
- Bosschaart, K.J., De Goey, L.P.H., “The laminar burning velocity of flames propagating in mixtures of hydrocarbons and air measured with the heat flux method,” Combustion and Flame 136 (2004) 261-269.
- 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 (2009) 292-301
- Verhelst, S., Woolley, R., Lawes, M., Sierens, R., “Laminar and unstable burning velocities and Markstein lengths of hydrogen-air mixtures at engine-like conditions,” Proceedings of the Combustion Institute 30 (2005) 209-216
- Qin, X., Kobayashi, H., Niioka, T., “Laminar burning velocity of hydrogen-air premixed flames at elevated pressure,” Experimental Thermal and Fluid Science 21 (2000) 58-63.
- Vancoillie, J., Demuynck, J., Galle, J., Verhelst, S., et al., “A laminar burning velocity and flame thickness correlation for ethanol-air mixtures valid at spark-ignition engine conditions,” Fuel 102 (2012) 460-469.
- Van Lipzig, J.P.J., Nilsson, E.J.K., De Goey, L.P.H., Konnov, A.A., “Laminar burning velocities of n-heptane, iso-octane, ethanol and their binary and tertiary mixtures,” Fuel 90 (2011) 2773-2781.
- Dirrenberger, P., Glaude, P.A., Bonaceur, R., Le Gall, H., Pires da Cruz, A., Konnov, A.A., Battin-Leclerc, F., “Laminar burning velocity of gasolines with addition of ethanol,” Fuel 115 (2014) 162-169
- Mehl, M., Pitz, W.J., Westbrook, C.K., Curran, H.J., “Kinetic modeling of gasoline surrogate components and mixtures under engine conditions,” Proceedings of the Combustion Institute 33 (2011) 193-200.
- Andrae, J.C.G., “Development of a detailed kinetic model for gasoline surrogate fuels,” Fuel 87 (2008) 2013-2022.
- Andrae, J.C.G., Head, R.A., “HCCI experiments with gasoline surrogate fuels modeled by a semidetailed chemical kinetic model,” Combustion and Flame 156 (2009) 842-851.
- Breda, S., D'Adamo, A., Fontanesi, S., D'Orrico, F. et al., "Numerical Simulation of Gasoline and n-Butanol Combustion in an Optically Accessible Research Engine," SAE Int. J. Fuels Lubr. 10(1):32-55, 2017, doi:10.4271/2017-01-0546.
- d'Adamo, A., Breda, S., Fontanesi, S., and Cantore, G., "LES Modelling of Spark-Ignition Cycle-to-Cycle Variability on a Highly Downsized DISI Engine," SAE Int. J. Engines 8(5):2029-2041, 2015, doi:10.4271/2015-24-2403.
- D'Adamo, A., Breda, S., Fontanesi, S., and Cantore, G., "A RANS-Based CFD Model to Predict the Statistical Occurrence of Knock in Spark-Ignition Engines," SAE Int. J. Engines 9(1):618-630, 2016, doi:10.4271/2016-01-0581.
- Breda, S., D'Adamo, A., Fontanesi, S., Giovannoni, N. et al., "CFD Analysis of Combustion and Knock in an Optically Accessible GDI Engine," SAE Int. J. Engines 9(1):641-656, 2016, doi:10.4271/2016-01-0601.
- Iaccarino, S., Breda, S., D'Adamo, A., Fontanesi, S. et al., "Numerical Simulation and Flame Analysis of Combustion and Knock in a DISI Optically Accessible Research Engine," SAE Int. J. Engines 10(2):576-592, 2017, doi:10.4271/2017-01-0555.
- d'Adamo, A., Berni, F., Breda, S., Lugli, M. et al., "A Numerical Investigation on the Potentials of Water Injection as a Fuel Efficiency Enhancer in Highly Downsized GDI Engines," SAE Technical Paper 2015-01-0393, 2015, doi:10.4271/2015-01-0393.
- Berni, F., Breda, S., D'Adamo, A., Fontanesi, S. et al., "Numerical Investigation on the Effects of Water/Methanol Injection as Knock Suppressor to Increase the Fuel Efficiency of a Highly Downsized GDI Engine," SAE Technical Paper 2015-24-2499, 2015, doi:10.4271/2015-24-2499.
- Merola, S.S., Irimescu, A., Tornatore, C., Valentino, G., “Effect of the fuel-injection strategy on flame-front evolution in an optical wall-guided DISI engine with gasoline and butanol fueling,” Journal of Energy Engineering, Volume 142, Issue 2, 1 June 2016.
- Merola, S., Irimescu, A., Tornatore, C., Marchitto, L. et al., "Split Injection in a DISI Engine Fuelled with Butanol and Gasoline Analyzed through Integrated Methodologies," SAE Int. J. Engines 8(2):474-494, 2015, doi:10.4271/2015-01-0748.
- Ranzi, E., Frassoldati, A., Stagni, A., Pelucchi, M., Cuoci, A., Faravelli, T., “Reduced Kinetic Schemes of Complex Reaction Systems: Fossil and Biomass-Derived Transportation Fuels,” International Journal of Chemical Kinetics DOI 10.1002/kin.20867
- Zeuch, T., Moreac, G., Ahmed, S.S., Mauss, F., "A comprehensive skeletal mechanism for the oxidation of n-heptane generated by chemistry-guided reduction", Combustion and Flame 1555 (2008) 651-674
- Pan, J., Wei, H., Shu, G., Chen, Z., Zhao, P., “The role of low temperature chemistry in combustion mode development under elevated pressures,” Combustion and Flame 174 (2016) 179-193
- Metcalfe, W.K., Dooley, S., Dryer, F.L., “Comprehensive Detailed Chemical Kinetic Modeling Study of Toluene Oxidation,” Energy Fuels 2011, 25, 4915-4936, dx.doi.org/10.1021/ef200900q
- Cai, L., Pitsch, H., “Optimized chemical mechanism for combustion of gasoline surrogate fuels,” Combustion and Flame 162 (2015) 1623-1637.
- Gauthier, B. M.; Davidson, D. F.; Hanson, R. K. Combust Flame 2004, 139, 300-311
- Brusca, S., Lanzafame, R., Marino Cugno Garrano, A., Messina, M., “Effects of Pressure, Temperature and Dilution on Fuels/Air Mixture Laminar Flame Burning Velocity, “Energy Procedia, Vol. 82, Pages 125-132, doi:10.1016/j.egypro.2015.12.004.
- Turns, S., “An Introduction to Combustion,” McGraw Hill.