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Stratified Mixture Formation and Combustion Process for Wall-guided Stratified-charge DISI Engines with Different Piston Bowls by Simulation
Technical Paper
2010-01-0595
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents the simulation of in-cylinder stratified
mixture formation, spray motion, combustion and emissions in a
four-stroke and four valves direct injection spark ignition (DISI)
engine with a pent-roof combustion chamber by the computational
fluid dynamics (CFD) code. The Extended Coherent Flame Combustion
Model (ECFM), implemented in the AVL-Fire codes, was employed. The
key parameters of spray characteristics related to computing
settings, such as skew angle, cone angle and flow per pulse width
with experimental measurements were compared.
The numerical analysis is mainly focused on how the tumble flow
ratio and geometry of piston bowls affect the motion of
charge/spray in-cylinder, the formation of stratified mixture and
the combustion and emissions (NO and CO₂) for the wall-guided
stratified-charge spark-ignition DISI engine. But due to the fuel
injected during compression stroke, the effect of intake ports and
exhaust ports were not taken into consideration in this study. It
is found that the geometry of piston bowls has a major effect on
the mixture stratification in-cylinder, the combustion process and
others. In addition, the characteristics of the charge motion and
combustion, such as mean in-cylinder pressure, heat release rate
and accumulated heat release vary as a function of crank angle at
different injection timings and tumble flow ratios, based on one of
two combustion geometries. The results show that the injection
timing and piston bowl shape play very important roles for the
combustion process and mixture stratification. Furthermore, the
simulation provides an insight into the interaction of charge flow,
fuel spray, piston bowl as well as combustion.
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Authors
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Citation
Fan, Q., Hu, Z., Deng, J., Li, L. et al., "Stratified Mixture Formation and Combustion Process for Wall-guided Stratified-charge DISI Engines with Different Piston Bowls by Simulation," SAE Technical Paper 2010-01-0595, 2010, https://doi.org/10.4271/2010-01-0595.Also In
SI Combustion and Direct Injection SI Engine Technology, 2010
Number: SP-2278; Published: 2010-04-13
Number: SP-2278; Published: 2010-04-13
References
- Zhao, F. “Automotive Gasoline Direct Injection Engines,” SAE International Warrendale, PA 978-0-7680-0882-1 2002
- Rotondi Rossella Bella Gino Gasoline direct injection spray simulation International Journal of Thermal Sciences 45 2006 168 179
- Schänzlin, K. Koch, T. Tzannis, A.P. Boulouchos, K. “Characterization of Mixture Formation in a Direct Injected Spark Ignition Engine” SAE Technical Paper 2001-01-1909 2001
- Hélie, J. Duclos, J.-M. Baritaud, T. Poinsot, T. et al. “Influence of Mixture Fluctuations on Combustion in Direct Injection Spark Ignition Engines Simulations,” SAE Technical Paper 2001-01-1226 2001
- Olmo, L. Thornton, J. “CFD Analysis of Mixture Formation and Combustion Process for High Performance DI Gasoline Engine,” SAE Technical Paper 2005-01-0214 2005
- Yi, J. Han, Z. Yang, J. Anderson, R. et al. “Modeling of the Interaction of Intake Flow and Fuel Spray in DISI Engines,” SAE Technical Paper 2000-01-0656 2000
- Kim, S.-J. Kim, Y.-N. Lee, J.-H. “Analysis of the In-Cylinder Flow, Mixture Formation and Combustion Processes in a Spray-Guided DISI Engines,” SAE Technical Paper 2008-01-0142 2008
- Fontana, G. Galloni, E. Palmaccio, R. Torella, E. “Numerical and Experimental Analysis of Different Combustion Chambers for a Small Spark-Ignition Engine,” SAE Technical Paper 2004-01-1998 2004
- Ohm, I.Y. Cho, Y.S. “Fuel Stratification Process in the Cylinder of an Axially Stratified Engine,” SAE Technical Paper 2000-01-2842 2000
- Kano, M. Saito, K. Basaki, M. Matsushita, S. et al. “Analysis of Mixture Formation of Direct Injection Gasoline Engine,” SAE Paper 980157 1998
- Kaiser, E. W. Siegl, W.O. Brehob, D.D. Haghgooie, M. “Engine-Out Emissions from a Direct-Injection Spark-Ignition (DISI) Engine,” SAE Technical Paper 1999-01-1529 1999
- Muñoz, R.H. Han, Z. VanDerWege, B. Yi, J. “Effect of Compression Ratio on Stratified-Charge Direct- Injection Gasoline Combustion,” SAE Technical Paper 2005-01-0100 2005
- AVL Fire_2008_CFD User Manual
- Anderson John D. Computational Fluid Dynamics
- Xie Maozhao Computational Combustion of Internal Combustion Engine Dalian University of Science and Technology press China 2005
- Wu Deming Hao Ye Practical Computational Fluid Dynamics Fundamentals Haerbin Engineering Universuty press China 2006
- Hentschel Werner Optical diagnostics for combustion process development direct injection gasoline engines Proceedings of the Combustion Institute 28 1119 1135 2005
- Wei Li Ying Wang et al. Study on improvement of fuel economy and reduction in emissions for stoichiometric gasoline engines Applied Thermal Engineering 27 2919 2923 2007
- Canakci Mustafa An experimental study for the effects of boost pressure on the performance and exhaust emissions of a DI-HCCI gasoline engine Fuel 87 1503 1514 2008