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CFD Modeling of Mixture Preparation and Soot Formation in a Downsized Gasoline Direct Injection Engine
Technical Paper
2016-01-0586
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
With increasingly stringent requirements and regulations related to particulate matter(PM) emissions, manufacturers are paying more and more attention to emissions from gasoline direct injection(GDI) engines. The present paper proposes an improved two-step soot model. The model is applied in the Kiva-Chemkin program to simulate the processes of spray impinging, fuel mixture preparation, combustion and soot formation in a typical turbocharged downsized GDI engine. The simulation results show that soot formation in the GDI engine is attributed to non-uniform distribution of the air-fuel mixture and pool fire of wall film in the cylinder. Under homogeneous mode, increasing the injection advance angle can optimize fuel atomization and improve air-fuel mixing, thus reducing soot formation. However, an excessive injection advance angle may cause spray to impinge on the cylinder wall and this will sharply increase the soot emission. Under stratified operation, soot formation can be attributed to combustion of locally fuel-rich mixture. The soot model proposed can satisfactorily predict the trends of soot formation in a GDI engine.
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Dong, Z., Shuai, S., Wang, Z., and Zhao, H., "CFD Modeling of Mixture Preparation and Soot Formation in a Downsized Gasoline Direct Injection Engine," SAE Technical Paper 2016-01-0586, 2016, https://doi.org/10.4271/2016-01-0586.Also In
References
- Basshuysen R.V. Gasoline engine with direct injection: processes, systems, development, and potential Wisbaden Vieweg & Teubner press 2009
- Peters A. , Dockery D. W. , Muller J. E. , and Mittleman M. A. Increased particulate air pollution and the triggering of myocardial infarction Circulation 103 23 2810 2815 2001
- Köpple , F. , Jochmann , P. , Hettinger , A. , Kufferath , A. et al. A Novel CFD Approach for an Improved Prediction of Particulate Emissions in GDI Engines by Considering the Spray-Cooling on the Piston SAE Technical Paper 2015-01-0385 2015 10.4271/2015-01-0385
- Jiao , Q. and Reitz , R. Modeling of Equivalence Ratio Effects on Particulate Formation in a Spark-Ignition Engine under Premixed Conditions SAE Technical Paper 2014-01-1607 2014 10.4271/2014-01-1607
- Jiao , Q. and Reitz , R. The Effect of Operating Parameters on Soot Emissions in GDI Engines SAE Int. J. Engines 8 3 1322 1333 2015 10.4271/2015-01-1071
- Buri S. , Kubach H. , Spicher U. Effects of increased injection pressures of up to 1000 bar - opportunities in stratified operation in a direct-injection spark-ignition engine International Journal of Engine Research 11 473 484 2010
- Bonandrini , G. , Di Gioia , R. , Papaleo , D. , and Venturoli , L. Numerical Study on Multiple Injection Strategies in DISI Engines for Particulate Emission Control SAE Technical Paper 2012-01-0400 2012 10.4271/2012-01-0400
- Hiroyasu H. , Kadota T. Development and use of a spray combustion modeling to predict diesel engine efficiency and pollutant emissions Bulletin of the JSAM 26 569 575 1983
- Tao F. , Reitz R. , Foster D. , Liu Y. Nine-step phenomenological diesel soot model validated over a wide range of engine conditions International Journal of Thermal Sciences 48 1223 1234 2009
- Etheridge J. et al. Modelling soot formation in a DISI engine Proceedings of the Combustion Institute 33 3159 3167 2011
- Wang B , Mosbach S , Schmutzhard S Mod-elling soot formation from wall films in a gasoline direct injection engine using a de-tailed population balance model Applied Energy 2016 163 154 166
- Fan , L. and Reitz , R. Development of an Ignition and Combustion Model for Spark-Ignition Engines SAE Technical Paper 2000-01-2809 2000 10.4271/2000-01-2809
- Tan , Z. , Kong , S. , and Reitz , R. Modeling Premixed and Direct Injection SI Engine Combustion Using the G-Equation Model SAE Technical Paper 2003-01-1843 2003 10.4271/2003-01-1843
- Han , Z. and Xu , Z. Wall Film Dynamics Modeling for Impinging Sprays in Engines SAE Technical Paper 2004-01-0099 2004 10.4271/2004-01-0099
- Stanton , D. and Rutland , C. Modeling Fuel Film Formation and Wall Interaction in Diesel Engines SAE Technical Paper 960628 1996 10.4271/960628
- O'Rourke , P. and Amsden , A. A Particle Numerical Model for Wall Film Dynamics in Port-Injected Engines SAE Technical Paper 961961 1996 10.4271/961961
- Yu. , W.A. , Abhijeet R. B. , Suk , H. C. A PAH growth mechanism and synergistic effect on PAH formation in counter flow diffusion flames Combustion and Flame 160 1667 1676 2013
- Nagle , J. , Strickland-Constable , R.F. Oxidation of carbon between 1000-2000 °C, Proc 5th Carbon Conference 1 154 164
- Ra , Y. ; Reitz , R. D. A reduced chemical kinetic model for IC engine combustion simulations with primary reference fuels Combust.Flame 2008 155 713 738