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3D-1D Analyses of the Turbulent Flow Field, Burning Speed and Knock Occurrence in a Turbocharged SI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 16, 2007 by Consiglio Nazionale delle Ricerche in Italy
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CFD techniques are more and more utilized in the development of new solutions for performance improvement of internal combustion engines.
Three dimensional models, in general, are able to provide detailed and sound information on engine phenomena, but often they are time consuming and hard to be implemented. On the other hand, one-dimensional models can reproduce the entire engine cycle with acceptable computational times; however they need semi-empirical correlations in order to model the flow field details and the burning speed within each cylinder.
In this paper, an example of hierarchical structure of 3-D and 1-D models has been proposed. The main performances of a small turbocharged spark-ignition engine have been calculated. Variable-speed and full load operating points have been analyzed. The 3-D model provided the details of the in-cylinder flow field and turbulent indices. These results have been utilized as reference data in tuning a quasi-dimensional turbulent combustion model, included within a 1-D model of a “downsized” turbocharged spark-ignition (SI) engine. Combustion modeling utilizes a deeply validated approach based on a fractal schematization of the flame front surface. Knock occurrence has been predicted by the solution of a kinetic-scheme inside the “end-gas” unburned zone. Once tuned, the one-dimensional code has been finally applied to find the knock-limited spark-advance at wide-open-throttle conditions, for different engine speeds. Numerical results have been compared to the experimentally determined values and a good agreement has been found.
This work demonstrates as matching models of different hierarchical levels could be a useful tool in the industrial development of high efficiency engines.
CitationBozza, F., Fontana, G., Galloni, E., and Torella, E., "3D-1D Analyses of the Turbulent Flow Field, Burning Speed and Knock Occurrence in a Turbocharged SI Engine," SAE Technical Paper 2007-24-0029, 2007, https://doi.org/10.4271/2007-24-0029.
- WatsonN., JanotaM.S., “Turbocharging the Internal Combustion Engine”, John Wiley, New York, 1982.
- HeywoodJ.B., “Internal Combustion Engine Fundamentals”, McGraw-Hill Int. editions, 1988
- FontanaG., GalloniE., PalmaccioR., TorellaE., “Numerical Analysis of a Small Turbo-Charged Spark-Ignition Engine”, ICES2006-1336, ASME/ICE Spring Technical Conference 2006, Aachen.
- BozzaF., GimelliA., StrazzulloL., TorellaE., CasconeC., “Steady-state and Transient Operation Simulation of a ‘Downsized’ Turbocharged SI Engine”, SAE Paper no. 2007-01-0381
- FontanaG., GalloniE., “Knock Resistance in a Small Turbocharged Spark-Ignition Engine”, International Session - The Sustainable Mobility Challenge - of 61st ATI 2006 Congress, SAE n. 2006-01-2995.
- ShahedM.R., “Engine Downsizing and Boosting for CO2 Emission Reduction”, presented at International Vehicle Technology Symposium, March 11-13, 2003.
- StokesJ., LakeT.H. and OsborneR.J., “A Gasoline Engine Concept for Improved Fuel Economy -The Lean Boost System”, SAE paper 2000-01-2902.
- PoliceG., DianaS., GiglioV., IorioB., RispoliN., “Downsizing of SI Engines by Turbo-Charging”, ESDA2006-95215, Proceedings of ESDA2006, 8th Biennial ASME Conference on Engineering Systems Design and Analysis, July 4-7, 2006, Torino, Italy.
- LeducP., DubarB., RaniniA., MonnierG., “Downsizing of Gasoline Engines: an Efficient Way to Reduce CO2 Emissions”, Oil and Gas Science and tech. - Rev. IFP, vol. 58 (2003), No. 1, pp. 115-127.
- LecointeB. and MonnierG., “Downsizing a Gasoline Engine Using Turbocharging with Direct Injection”, SAE Paper no. 2003-01-0542.
- WirthM., MayerhoferU., PiockW.F. and FraidlG.K., “Turbocharging the DI Gasoline Engine”, SAE Paper no. 2000-01-0251.
- LakeT., StokesJ. et al., “Turbocharging Concepts for Downsized DI Gasoline Engines”, SAE Paper no. 2004-01-0036.
- PetitjeanD. et al., “Advanced Gasoline Engine Turbocharging Technology for Fuel Economy Improvements”, SAE Paper no. 2004-01-0988.
- AVL FIRE Handbook, Version 7, April 2000, Internal Report
- TatschlR., WieserK., ReitbauerR., “Multidimensional Simulation of Flow Evolution, Mixture Preparation and Combustion in a 4-Valve SI Engine”, Third International Symposium on Diagnostic and Modeling of Combustion in Internal Combustion Engines, Yokohama, 1994.
- FontanaG., GalloniE. and PalmaccioR., “Development of a New Intake System for a Small Spark-Ignition Engine: Modeling the Flow through the Inlet Valve”, SAE Paper no. 2003-01-0369, 2003.
- BozzaF., GimelliA., TuccilloR., “The Control of a VVA Equipped SI-Engine Operation by Means of 1D Simulation and Mathematical Optimization”, SAE 2002 Transactions, Journal of Engines, Section 3 - Volume 111, pp. 1790 - 1801.
- BozzaF., GimelliA., SianoD., TorellaE., MastrangeloG., “A Quasi-Dimensional Three-Zone Model for Performance and Combustion Noise Evaluation of a Twin-Spark High-EGR Engine”, SAE 2004 Transaction, Journal of Engines - section 3, vol. 113-3, pp. 491-501, ISBN 0-7680-1552-9, 2005.
- BozzaF., GimelliA., MerolaS. S., VagliecoB. M., “Validation of A Fractal Combustion Model through Flame Imaging”, SAE 2005 Transaction, Journal of Engines - section 3, vol. 114-3, pp. 973-987, ISBN 0-7680-1689-4, 2006.
- PoulosS.G., HeywoodJ.B., “The Effect of Chamber Geometry on Spark-Ignition Engine Combustion”, SAE paper 830334, 1983.
- GT-Power, User's Manual and Tutorial, GT-SUITE™ Version 6.1, Gamma Technologies.
- CurranH. J., GaffuriP., PitzW. J., WestbrookC. K., “A Comprehensive Modeling Study of Iso-Ooctane Oxidation”, Combustion & Flame 129:253-280, 2002.
- RanziE., GaffuriP., FaravelliT., DagautP., “A Wide Range Modeling Study of n-Hepthane Oxidation”, Combustion and Flame 103, pp. 91-106, 1995.
- RanziE., FaravelliT., GaffuriP., SogaroA., D'AnnaA., CiajoloA., “A Wide Range Modeling Study of Iso-Octane Oxidation”, Combustion & Flame 108, pp. 24-42, 1997.
- HuH., KeckJ., “Autoignition of Adiabatically Compressed Combustible Gas Mixtures”, SAE 872110, 1987.
- KeckJ., HuH., “Explosions of Adiabatically Compressed Gases in a Constant Volume Bomb”, 21st International Symposium on Combustion, The Combustion Institute, 1986, pp. 521-529.
- TanakaS., AyalaF., KeckJ., “A Reduced Chemical Kinetic Model for HCCI Combustion of Primary Reference Fuels”, Combustion & Flame, 132, pp. 219-239, 2003.
- D'ErricoG., LucchiniT., OnoratiA., MehlM., FaravelliT., RanziE., MerolaS., VagliecoB.M., “Development and Experimental Validation of a Combustion Model with Detailed Chemistry for Knock Predictions”, SAE 2007-01-0938, 2007.
- MehlM., FaravelliT., RanziE., LucchiniT., OnoratiA., GiavazziF., ScorlettiP., TernaD., “Kinetic Modeling of Knock Properties in Internal Combustion Engines”, SAE 2006-01-3239, 2006.