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Cylinder Charge, Initial Flow Field and Fuel Injection Boundary Condition in the Multidimensional Modeling of Combustion in Compression Ignition Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 25, 2004 by SAE International in United States
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Cylinder charge, cylinder flow field and fuel injection play the dominant roles in controlling combustion in compression ignition engines. Respective computational cylinder charge, initial flow field and fuel injection boundary affect combustion simulation and the quality of emission prediction. In this study the means of generating the initial values and boundary data are presented and the effect of different methods is discussed. This study deals with three different compression ignition engines with cylinder diameters of 111, 200 and 460 mm. The initial cylinder charge has been carefully analyzed through gas exchange pressure recordings and corresponding 1-dimensional simulation. The swirl generated by intake ports in a high-speed engine is simulated and measured. The combustion simulation using a whole cylinder model was compared with a sector model simulation result. The difference between a sector mesh simulation and a whole cylinder model simulation was found to be considerable in case of a high speed diesel engine. In case of a medium speed engine the gains of using the whole cylinder model were more questionable. The simulation of fuel injection rate and injection velocity at the nozzle exit is presented in this study, as well. The validation of this simulation was made through injection pressure and injector needle lift measurements. The fuel injection boundary condition, the predicted injection velocity, was found to have a noteworthy effect on the simulated heat release.
CitationAntila, E., Larmi, M., Saarinen, A., Tiainen, J. et al., "Cylinder Charge, Initial Flow Field and Fuel Injection Boundary Condition in the Multidimensional Modeling of Combustion in Compression Ignition Engines," SAE Technical Paper 2004-01-2963, 2004, https://doi.org/10.4271/2004-01-2963.
- Kawashima Jun-Ichi et al., ‘Research on a Variable Swirl Intake Port for 4-Valve High-Speed DI Diesel Engines’, SAE Technical Paper Series 982680
- AVL-bulletin N:o 128/Allgemein/011 14.4.1964
- Heywood John B., ‘Fluid Motion Within the Cylinder of Internal Combustion Engines-The 1986 Freeman Scholar Lecture’, Journal of Fluids Engineering, March 1987, Vol 109
- Lilly L.R.C., Diesel Engine Reference Book, Butterworth Co Ltd 1984, ISBN 0-408-00443-6
- Hogg, S., Leschziner M., A., ‘Computations of Highly Swirling Flow with Reynolds Stress Model’, AIAA Journal, Vol 27, No. 1, January 1989.
- Ahlstedt, H., ‘Modelling of confined highly swirling flows’, Doctoral dissertation, Tampere University of Technology, ISBN: 951-722-072-3, 1993.
- Kallio, A., Turunen, R., ‘Laskennallinen virtausdynamiikka ja moottoritutkimus’, MOBILE 122T loppuraportti, Helsinki University of Technology, Espoo 1998, ISBN 951-22-4268-0, (in Finnish).
- Monaghan M. L., Pettifer H.F., ‘Air Motion and its Effect on Diesel Performance and Emissions’, Diesel Combustion and Emissions, SP-484, ISBN 0.89883-255-2, Society of Automobile Engineers Inc, 1981.
- Kiijärvi, J., ‘Diesel Fuel Injection System Simulation’. Publications of the Internal Combustion Engine Laboratory, Helsinki University of Technology, No. 77, Espoo 2003, ISBN 951-22-6657-1, 126 p.
- Naber, Jeffrey D., Siebers Dennis L., ‘Effects of Gas Density an Dispersion of Diesel Sprays’, SAE 960034
- Bianchi, G.M., Falfari, S., Parotto M., and Osbat, G., ‘Advanced Modeling of Common Rail Injector Dynamics and Comparison with Experiments’. SAE Paper 2003-01-0006
- Mattarelli, E., Borghi, M., Balestrazzi, D., and Fontanesi, S., ‘The Influence of Swirl Control Strategies on the Intake Flow in Four Valve HSDI Diesel Engines’. SAE Paper 2004-01-0112.
- Miles, P., Megerle, M., RempelEwert, B., Reitz, R.D., Lai, M-C.D., and Sick, V., ‘The influence of Swirl Ratio on Turbulent Flow Structure in a Motored HSDI Diesel Engine - A Combined Experimental and Numerical Study’. SAE Paper 2004-01-1678.