CFD parametric analysis of the combustion chamber shape in a small HSDI Diesel engine
Published October 12, 2005 by Society of Automotive Engineers of Japan in Japan
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The paper aims at providing information about the influence of the combustion chamber shape on the combustion process evolution in a high speed direct injection (HSDI) small unit displacement engine for off-highway applications. Small HSDI Diesel engines require a deep optimisation process in order to maximize specific power output, while limiting pollutant emissions without additional expensive pollutant aftertreatment equipments. Making reference to a current production engine, the purpose of this paper is to investigate the influence of combustion chamber design on both engine performances and combustion efficiency. The actual piston omega-shape is progressively distorted in order to assess the influence of some of the main bowl-features on both mean-flow evolution, mixture formation and pollutants.
Using previously validated intake stroke CFD results as initial conditions, compression, injection and combustion simulations are performed in an attempt to trend the influence of bowl depth, bowl entrance angle, omega curvature radius and relative spray-bowl orientation on the engine performances and pollutants. Spray mixing effectiveness, combustion efficiency and NOx and Soot formation are used to compare the different geometries, operating the engine at high-speed full load.
CitationFONTANESI, S., GAGLIARDI, V., MALAGUTI, S., and MATTARELLI, E., "CFD parametric analysis of the combustion chamber shape in a small HSDI Diesel engine," SAE Technical Paper 2005-32-0094, 2005.
- Senecal, P.K. Montgomery, D.T. and Reitz, R.D.: “A Methodology for Engine Design Using Multidimensional Modeling and Genetic Algorithms with Validation Through Experiments”, International Journal of Engine Research, 1, 229, 2000.
- Senecal, P.K. and Reitz, R.D., “Simultaneous Reduction of Engine Emissions and Fuel Consumption Using Genetic Algorithms and Multi-Dimensional Spray and Combustion Modeling”, SAE 2000-01-1890, 2000
- Wickman, D.D., Senecal, P.K. and Reitz, R.D., “Diesel Engine Combustion Chamber Geometry Optimization Using Genetic Algorithms and Multi-Dimensional Spray and Combustion Modeling”, SAE 2001-01-0547, 2001.
- Senecal, P.K., Pomraning, E. and Richards, K.J., “Multi-Mode Genetic Algorithm Optimization of Combustion Chamber Geometry for Low Emissions”, SAE 2002-01-0958, 2002.
- Tatschl, R., Gabriel, H.P. and Priesching, P. “FIRE - A Generic CFD Platform for DI Diesel Engine Mixture Formation and Combustion Simulation.” International Multidimensional Modeling User's Group Meeting at the SAE Congress. Detroit, U.S.A., 2001.
- Mattarelli, E., Borghi, M., Balestrazzi, D. and Fontanesi, F. “The Influence of Swirl Control Strategies on the Intake Flow in Four Valve HSDI Diesel Engines”, SAE Paper 2004-01-0112. 2004
- Mattarelli, E., Montorsi, L. and Fontanesi, F., “Numerical Analysis of Swirl Control Strategies in a Four Valve HSDI Diesel engines”. ICEF2004-909. Proceedings of ASME 2004 Fall Technical Conference.
- Yakhot, V., and Orszag, S.A.: ‘Renormalization group analysis of turbulence - I: Basic theory’, J. Scientific Computing, 1, pp. 1-51.
- Yakhot, V., Orszag, S.A., Thangam, S., Gatski, T.B., and Speziale, C.G.: ‘Development of turbulence models for shear flows by a double expansion technique’, Phys. Fluids, A4(7), pp. 1510-1520.
- Versteeg, H. K., Malalasekera, W., “An introduction to computational fluid dynamics. The finite volume method”, Longman, 1995
- Allocca, L., Auriemma, M., Corcione, F.E., Valentino G., Fontanesi, S., Gagliardi, V., Malaguti, D., Riganti G.: “Investigation of Mixture Formation Process in a HDDI Diesel Engine by CFD and Imaging Technique”, SAE Paper 05-AE-270, SAE 2005 World Congress, Detroit (MI), April 2005
- Huh, K.Y., and Gosman, A.D.: ‘A phenomenological model of Diesel spray atomisation’, Proc. Int. Conf. on Multiphase Flows (ICMF '91), Tsukuba, 24-27 September.
- Reitz, R.D., and Diwakar, R.: ‘Effect of drop breakup on fuel sprays’, SAE Technical Paper Series 860469.
- Reitz, R.D., and Diwakar, R.: ‘Structure of high-pressure fuel spray’, SAE Technical Paper Series 870598.
- O'Rourke, P.J.: “Collective Drop Effects on Vaporising Liquid Sprays”. PhD Thesis, University of Princeton.
- Bai, C., and Gosman, A.D.: ‘Development of methodology for spray impingement simulation’, SAE Technical Paper Series 950283.
- Magnussen, B.F., and Hjertager, B.W.: ‘On the structure of turbulence and a generalised eddy dissipation concept for chemical reaction in turbulent flow’, 19th AIAA Aerospace Meeting, St. Louis, USA.
- Magnussen, B.F., and Hjertager, B.H.: ‘On mathematical modeling of turbulent combustion with special emphasis on soot formation and combustion’, 16th Symp. (Int.) on Combustion, The Combustion Institute, pp. 719-729.
- Abraham, J., Bracco, F.V., and Reitz, R.D.: ‘Comparison of computed and measured premixed charge engine combustion’, Combust. Flame, 60, pp. 309-322.
- Patterson, M.A., Kong, S.-C., Hampson, G.J., and Reitz, R.D.: ‘Modeling the effects of fuel injection characteristics on diesel engine soot and NOx emissions’. SAE Technical Paper Series 940523.
- Müller, U.C., and Peters, N.: ‘Development of reduced reaction schemes for the ignition of Diesel fuels in a non-premixed turbulent flow field’, IDEA Project, Periodic Report No. 3.
- Theobald, M.A., and Cheng, W.K.: ‘A numerical study of Diesel ignition’, Proc. ASME Energy-Sources Technology Conf. and Exhibit, Dallas, Texas, USA, 15-20 February, Paper No. 87-FE-2.
- Müller, U.C., and Peters, N.: ‘Development of reduced reaction schemes for the ignition of Diesel fuels in a non-premixed turbulent flow field’, IDEA Project, Periodic Report No. 4, pp. 154-177.
- Müller, U.C., and Peters, N.: ‘Development of reduced reaction schemes for the ignition of Diesel fuels in a non-premixed turbulent flow field’, IDEA Project, Periodic Report No. 3, pp. 151-165.
- Flower, W.L., Hanson, R.K., and Kruger, C.H.: ‘Kinetics of the reaction of nitric oxide with hydrogen’, 15th Symp. (Int.) on Combustion, The Combustion Institute, pp. 823-832.
- Monat, J.P., Hanson, R.K., and Kruger, C.H.: ‘Shock tube determination of the rate coefficient for the reaction N2 + O → NO + O’ 17th Symp. (Int.) on Combustion, The Combustion Institute, p. 543-552.
- Baulch, D.L., Drysdall, D.D., Horne, D.G., and Lloyd, A.C.: “Evaluated Kinetic Data for High Temperature Reactions”. Butterworth.
- Westenberg, A.A.: “Combustion Science and Technology”.
- Karlsson, A., Magnusson, I., Balthasar, M., and Mauss, F.: ‘Simulation of soot formation under Diesel engine conditions using a detailed kinetic soot model’, Proc. SAE Int. Congr. and Expo., Detroit, Michigan, USA, 23-26 February, SAE Technical Paper Series 981022.