This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical Investigation of Combustion in a Lean Burn Gasoline Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 08, 2013 by SAE International in United States
Annotation ability available
This research effort focuses on lean-burn combustion in gasoline internal combustion engines. Gasoline is largely known to be characterized by narrow flammability range, which makes the use of ultra-lean mixtures very challenging. In order to fully explore the gasoline lean burn potential, a promising strategy should combine advanced intake geometries, injection strategies, and ignition technologies.
In this paper, a CFD methodology is developed in order to provide proper insight into lean-burn gasoline combustion. A baseline homogenous/lean case is analyzed and numerical results are validated against engine data.
Two critical issues are addressed. First, a relatively large detailed mechanism is validated against the experimental data for extreme operating conditions (low pressure values, lean mixtures). The large cycle-to-cycle variation characterizing lean combustion is shown experimentally. An advanced numerical approach is proposed that delivers oscillation in the CFD results as an effect of the reduced numerical diffusion. The results indicate that the CFD methodology presented in this paper has a potential in describing the average behavior of the engine while future work will address cycle-to-cycle variation and combustion stability.
Secondly, the effect of the intake geometry on the in-cylinder flow and flame propagation is shown. Numerical simulations are able to highlight combustion features that are of primary importance for future engine optimization.
CitationScarcelli, R., Matthias, N., and Wallner, T., "Numerical Investigation of Combustion in a Lean Burn Gasoline Engine," SAE Technical Paper 2013-24-0029, 2013, https://doi.org/10.4271/2013-24-0029.
- Shimizu, R., Nakata, K., Kanda, M., “Analysis of a Lean Burn Combustion Concept for Hybrid Vehicles”, 30th Internationales Wiener Motorensymposium, Fortschritt-Berichte VDI, Reihe 12, Nr. 697, 2009.
- Battistoni, M., Grimaldi, C.N., Mariani, F., “Numerical Study of SI Engine Part Load Operating Conditions using Different VVA Strategies”, ASME paper ICEF2011-60205, 2011.
- Lee, K., Bae, C., Kang, K., “The Effects of Tumble and Swirl Flows on Flame Propagation in a Four-Valve S.I. Engine”, Applied Thermal Engineering 27, 2122-2130, 2007.
- Schwarz, C., Schünemann, E., Durst, B., Fischer, J. et al., “Potentials of the Spray-Guided BMW DI Combustion System,” SAE Technical Paper 2006-01-1265, 2006, doi:10.4271/2006-01-1265.
- Smith, J., Szekely, G. Jr., Solomon, A., and Parrish, S., “A Comparison of Spray-Guided Stratified-Charge Combustion Performance with Outwardly-Opening Piezo and Multi-Hole Solenoid Injectors,” SAE Int. J. Engines 4(1):1481-1497, 2011, doi:10.4271/2011-01-1217.
- Wang, F., Liu, J. B., Sinibaldi, J., Brophy, C., Kuthi, A., Jiang, C., Ronney, P. D., Gundersen, M. A., “Transient Plasma Ignition of Quiescent and Flowing Air/Fuel Mixture”, IEEE Transactions on Plasma Science, Vol. 33, pp. 844-849, 2005.
- Ikeda, Y., Nishiyama, A., Wachi, Y., and Kaneko, M., “Research and Development of Microwave Plasma Combustion Engine (Part I: Concept of Plasma Combustion and Plasma Generation Technique),” SAE Technical Paper 2009-01-1050, 2009, doi:10.4271/2009- 01-1050.
- Attard, W., Toulson, E., Huisjen, A., Chen, X. et al., “Spark Ignition and Pre-Chamber Turbulent Jet Ignition Combustion Visualization,” SAE Technical Paper 2012-01-0823, 2012, doi:10.4271/2012-01-0823.
- McIntyre, D., Woodruff, S., Richardson, S., McMillian, M. et al., “Laser Spark Plug Development,” SAE Technical Paper 2007-01-1600, 2007, doi:10.4271/2007-01-1600.
- Matthias, N., Wallner, T., and Scarcelli, R., “A Hydrogen Direct Injection Engine Concept that Exceeds U.S. DOE Light-Duty Efficiency Targets,” SAE Int. J. Engines 5(3):838- 849, 2012, doi:10.4271/2012-01-0653.
- Richards, K.J., Senecal, P.K., Pomraning, E., CONVERGE Users Guide & Reference Manual (Version 1.4.1), Convergent Science Inc., Middleton, WI, 2012.
- Yang, X., Solomon, A., and Kuo, T., “Ignition and Combustion Simulations of Spray-Guided SIDI Engine using Arrhenius Combustion with Spark-Energy Deposition Model,” SAE Technical Paper 2012-01-0147, 2012, doi:10.4271/2012-01-0147.
- Jia, M., Xie, M., “A chemical kinetics model of iso-octane oxidation for HCCI engines,” Fuel, 85, 2006, pp. 2593-2604.
- Givler, S., Raju, M., Pomraning, E., Senecal, P. et al., “Gasoline Combustion Modeling of Direct and Port-Fuel Injected Engines using a Reduced Chemical Mechanism,” SAE Technical Paper 2013-01-1098, 2013, doi:10.4271/2013-01-1098.
- Raju, M., Wang, M., Dai, M., Piggott, W. et al., “Acceleration of Detailed Chemical Kinetics Using Multi- zone Modeling for CFD in Internal Combustion Engine Simulations,” SAE Technical Paper 2012-01-0135, 2012, doi:10.4271/2012-01-0135.
- Metghalchi M., Keck J.C., “Burning Velocities of Mixtures of Air with Methanol, Isooctane, and Indolene at High Pressure and Temperature”, Combust. Flame, 48:191-210, 1982.
- Borghi, R., Destriau, M., “Combustion and flames, chemical and physical principles, Editions Technip, Paris, 1998.