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Experimental and Numerical Investigation of the Idle Operating Engine Condition for a GDI Engine
Technical Paper
2011-24-0031
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper investigates the idle operating condition of a current production turbocharged Gasoline Direct Injected (GDI) high performance engine both from an experimental and a numerical perspective. Due to the low engine speed, to the low injection pressure and to the null contribution of the turbocharger, the engine condition is far from the standard points of investigation. According to the low heat flux due to combustion, temperature levels are low and reduced fuel evaporation is expected. Consequently, fuel spray evolution within the combustion chamber and spray/wall interaction are key points for the understanding of the combustion process.
In order to properly investigate and understand the many complex phenomena, a wide set of engine speeds was experimentally investigated and, as far as the understanding of the physics of spray/wall interaction is concerned, many different injection strategies are tested. Among the wide set of experiments, the present paper focuses on a restricted portion which is then numerically reproduced and further investigated.
UV-visible imaging and spectral measurements are carried out in the engine to investigate the spray characteristics and flame propagation. Measurements are performed in the optically accessible combustion chamber realized by modifying the actual engine. The cylinder head is modified in order to allow the visualization of the fuel injection and the combustion process in the fourth cylinder using a high spatial and temporal resolution ICCD detector.
The complete engine cycle is reproduced by means of 3D-CFD simulations using a commercial code; due to the many physical submodels an ad hoc numerical methodology is validated and implemented. The CFD models are validated against experiments and particular care is devoted to the spray and wall film simulations. A lagrangian approach is implemented in order to simulate the GDI multihole spray. The experimental and numerical comparisons, in terms fuel mixing and flame front propagation, give a good understanding of the idle condition.
CFD analyses prove to be a very useful tool to investigate and understand the effects generated by the direct injection into the combustion chamber and they integrate the information provided by the optical investigations.
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Malaguti, S., Fontanesi, S., Vaglieco, B., Sementa, P. et al., "Experimental and Numerical Investigation of the Idle Operating Engine Condition for a GDI Engine," SAE Technical Paper 2011-24-0031, 2011, https://doi.org/10.4271/2011-24-0031.Also In
References
- Solomon, A. S. Anderson, R. W. Najt, P. M. Zhao, F. 2000 “Direct fuel injection for gasoline engines” SAE
- Zhao, F. Harrington, D.L. Lai, M.-C.D. “Automotive Gasoline Direct-Injection Engines,” SAE International Warrendale, PA 978-0-7680-0882-1 2002
- Malaguti, S. Fontanesi, S. Severi, E. “Numerical Analysis of GDI Engine Cold-Start at Low Ambient Temperatures,” SAE Technical Paper 2010-01-2123 2010 10.4271/2010-01-2123
- Suh, E. Rutland, C. “Numerical Study of Fuel/Air Mixture Preparation in a GDI Engine,” SAE Technical Paper 1999-01-3657 1999 10.4271/1999-01-3657
- Fan, L. Reitz, R. D. “Spray and combustion modeling in gasoline direct-injection engines” 2000 Atomization and Sprays 10 219 249 2000
- Heywood, J.B. Internal Combustion Engine Fundamentals New York McGraw-Hill 1988
- Ladommatos, N. Zhao, H. “Engine Combustion Instrumentation and Diagnostics,” SAE International Warrendale, PA 978-0-7680-0665-0 2001 10.4271/R-264
- Computational Dynamics “STAR-CD User Guide” 2010 London (UK)
- Computational Dynamics “STAR-CD Methodology” 2010 London (UK)
- Malaguti, S. Cantore, G. Fontanesi, S. Lupi, R. et al. “CFD Investigation of Wall Wetting in a GDI Engine under Low Temperature Cranking Operations,” SAE Technical Paper 2009-01-0704 2009 10.4271/2009-01-0704
- Yakhot, V. Orszag, S.A. Thangam, S. Gatski, T.B. Speziale, C.G. “Development of turbulence models for shear flows by a double expansion technique” Phys. Fluids 1992
- Cantore, G. Fontanesi, S. Mattarelli, E. Bianchi, G. “A Methodology for In-Cylinder Flow Field Evaluation in a Low Stroke-to-Bore SI Engine,” SAE Technical Paper 2002-01-1119 2002 10.4271/2002-01-1119
- Ruge, J.W. Stüben, K. 1986 ‘Algebraic Multigrid (AMG)’ in “Multigrid Methods” McCormick, S. Frontiers in applied Mathematics SIAM 5 Philadelphia
- Versteeg, H. K. Malalasekera, W. “An introduction to computational fluid dynamics. The finite volume method” Longman 1995
- Bracco, F. “Modeling of Engine Sprays,” SAE Technical Paper 850394 1985 10.4271/850394
- Dombrowski, N. Johns, W. R. “The aerodynamic instability and disintegration of viscous liquid sheets” Chem. Eng. Sci. 18 203 1963
- Nicholls, J.A. 1972 ‘Stream and droplet breakup by shock waves’ NASA SP-194 Harrje, D.T. Reardon, F.H. 126 128
- Reitz, R. Diwakar, R. “Effect of Drop Breakup on Fuel Sprays,” SAE Technical Paper 860469 1986 10.4271/860469
- Fontanesi, S. Gagliardi, V. Malaguti, S. Valentino, G. Auriemma, M. “Detailed experimental and numerical investigation of the spray structure in a GDI high-pressure swirl injector” ICLASS paper Kyoto 2006
- Malaguti, S. Fontanesi, S. Cantore, G. “Numerical characterization of a new high-pressure multi-hole GDI injector” ILASS Europe 2010 Brno, Czech Republic September 2010
- Gosman, A.D. Ioannides, S.I. 1983 “Aspects of computer simulation of liquid-fuelled combustors” AIAA, J. Energy 7 6 482 490
- O'Rourke, P.J. “Collective Drop Effects on Vaporising Liquid Sprays” PhD Thesis University of Princeton 1981
- Bai, C. Gosman, A. “Development of Methodology for Spray Impingement Simulation,” SAE Technical Paper 950283 1995 10.4271/950283
- Bai, C. Gosman, A. “Mathematical Modelling of Wall Films Formed by Impinging Sprays,” SAE Technical Paper 960626 1996 10.4271/960626
- Sirignano, W.A. 1999 “Fluid Dynamics and Transport of Droplets and Sprays” Cambridge University Press New York
- Torres, D.J. O'Rourke, P.J. Amsden, A.A. 2003 ‘Efficient multicomponent fuel algorithm’ Combust. Theory Modelling 7 67
- Foucart, H.
- Le Coz, J.F. Catalano, C. Baritaud, T. 1994 “Application of Laser Induced Fluorescence for Measuring the Thickness of Liquid Films on Transparent Wall” 7th Int. Symp. onApplication of Laser Techniques to Fluid Mechanics Lisbon 1994
- Habchi, C. Foucart, H. Baritaud, T. “Influence of the Wall Temperature on the Mixture Preparation in DI Gasoline Engines” Oil & Gas Science and Technology - Rev. IFP 54 2 211 222 1999
- Som, S. Aggarwal, Suresh “Assessment of Atomization Models for Diesel Engine Simulations” Atomization and Sprays 19 9 885 903 2009
- Gaydon, A.G. The Spectroscopy of Flames Chapman and Hall ltd. 1957
- Zhao, H. 2010 “Advanced Direct Injection Combustion Engine Technologies and Development” 1 Gasoline and Gas Engines Woodhead Publishing
- Witze, P. Green, R. “LIF and Flame-Emission Imaging of Liquid Fuel Films and Pool Fires in an SI Engine During a Simulated Cold Start,” SAE Technical Paper 970866 1997 10.4271/970866
- Witze, P. Hall, M. Bennett, M. “Cycle-Resolved Measurements of Flame Kernel Growth and Motion Correlated with Combustion Duration,” SAE Technical Paper 900023 1990 10.4271/900023
- Nogi, T. Ohyama, Y. Yamauchi, T. Kuroiwa, H. “Mixture Formation of Fuel Injection Systems in Gasoline Engines,” SAE Technical Paper 880558 1988 10.4271/880558
- Bianco, Y. Cheng, W. Heywood, J. “The Effects of Initial Flame Kernel Conditions on Flame Development in SI Engine,” SAE Technical Paper 912402 1991 10.4271/912402
- Senda, J. Ohnishi, M. Takahashi, T. Fujimoto, H. et al. “Measurement and Modeling on Wall Wetted Fuel Film Profile and Mixture Preparation in Intake Port of SI Engine,” SAE Technical Paper 1999-01-0798 1999 10.4271/1999-01-0798
- Cho, H. Min, K. 2003 “Measurement of Liquid Fuel Film Distribution on The Cylinder Liner of a Spark Ignition Engine Using The Laser-Induced Fluorescence Technique” Meas. Sci. Tech. 14 7 975 982