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Modification of an Experimental Model GDI Tumbling Flow by Direct Injection
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 03, 2003 by SAE International in United States
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Internal flow have a great contribution to the performance of internal combustion engines. A study of the modification of a model GDI tumbling flow is proposed in this paper. The first part gives an overview of the current works concerning in-cylinder flow. Our experiment generates and compress a tumbling vortex during one cycle. The experiment will be described as well as injection calibration. Indeed, It is not possible to use an industrial spray injector in our experiment since velocities in our chamber are lower than in cylinders. Furthermore, our flow is non reactive, the only vaporization would be due to the compression. We decide to use a gas injector. A non dimensional parameter comparing the angular momentum brought by the spray to the initial angular momentum of the tumble structure will be derived in the paper. This non dimensional parameter is useful to define and to analyse our model experiments while being sure to be relevant as engine situation is concerned. According to this parameter, further conditions of injection (angle) will be discussed.
PIV measurements of the tumble show that the structure is affected by the injection. The latter modifies the location of the rotation centre. Tumble behaviour during compression is not the same than without injection. Flow turns out to be three dimensional thus modifying breakdown proprieties. Tumble ability to participate to stratification will be discussed.
CitationMoreau, J., Boree, J., Bazile, R., and Charnay, G., "Modification of an Experimental Model GDI Tumbling Flow by Direct Injection," SAE Technical Paper 2003-01-0064, 2003, https://doi.org/10.4271/2003-01-0064.
- Matsushita, S., & al (1996) “Mixture formation process and combustion process of direct injection S.I. engine.” Proceedings of JSAE, 965, pp 101-104.
- Kume, T. & al, (1996) “Combustion control technologies for direct injection SI engine.”, SAE, 960600.
- Zhao, F. Q. (1997). “A review of mixture preparation and combustion strategies for DISI gasoline engine.” SAE 970627.
- Borée, J., Marc, D., Bazile, R. and Lecordier, B. (1999). “On the behaviour of a large scale tumbling vortex flow submitted to a compression.” European Series in Applied and Industrial Mathematics: http://www.emath.fr/Maths/Proc ESAIM Proceedings, Vol. 7.
- Arcoumanis, C., Whitelaw, J.H., (1987) “Fluid mechanics of internal combustion engines- a review”, ImechE,,201:pp 57-74.
- Arcoumanis, C., Hu, Z., Whitelaw, J.H., (1990),“Tumbling motion, a mechanism for turbulence enhancement in spark ignition engines”, SAE 900060.
- Boree, J., Maurel, S., Bazile, R., “Disruption of a compressed vortex”, J.Phys.Fluids, Vol 14, Issue 7, pp 2543-2556.
- Comte-Bellot, G. (1965). “Ecoulement turbulent entre deux parois parallèles”, Publications Scientifiques et Techniques du Ministère de l'air.
- Namazian, M., Hansen, S., Lyford-Pike, E., Sanchez-Barsse, J., Rife, J. and Heywood, J. (1980). “Schlieren visualisation of the flow and density fields in the cylinder of a spark ignition engine.” SAE 800044
- Kloeker, J. J., Krause, E. and Kuwahara, K. (1992). Vortical structures and turbulent phenomena in a piston engine model. Proc. of the 13 th ICNMFD, Rom, July 6-10, 1992.
- Grudno, A. D., Trautwein, S. E., Wassenberg, H. J. and Adomeit, G. (1994). “Spatially resolved determination of the turbulent flamme speed from CH band emission measurements under engine conditions.” SAE 940685.
- Lumley, J.L., “Engines. An introduction”, (1999). Cambrige University Press.
- Floch, A., Dupont, A., Baby, X., (1998), “In cylinder flow investigation in a gasoline direct injection four valves engine: bowl shape piston effects on swirl and tumble motion”. In Fisita, Paris.
- Keffer, J.F, Baines, W.D., (1963) “The round turbulent jet in crooswind”, J.Fluid Mech., vol. 15.
- Graftieaux, L., Michard, M., Grosjean, N.,(2000). “Combining PIV, POD and vortex identification algorithms for the study of unsteady turbulent swirling flows.”, EUROMECH 411, Session 5.