This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Flame Surface Density Measurements with PLIF in an SI Engine
Annotation ability available
Sector:
Language:
English
Abstract
A technique to determine flame surface density in a spark-ignition engine from planar laser-induced fluorescence (PLIF) images of the flame front is presented. To resolve the flame surface density in a three-dimensional fully turbulent flow field from two-dimensional images, the direction cosine (angle of intersection between the PLIF laser sheet and the normal to the flame front) must be known. To determine the direction cosine, images from orthogonal planes in the engine have been used to resolve the mean orientation angle along the line of intersection of the planes. The effect of engine speed and fuel-air equivalence ratio on the flame surface density are investigated. The flame surface density (∑) profiles and orientation angle are presented as a function of the progress variable. The direction cosines are almost identical in both orthogonal planes, indicating the isotropic nature of the flame front. As the engine speed is reduced, the direction cosine increases slightly. The Bray-Moss-Libby model coefficients obtained at maximum flame surface density in this work agree with previously reported experimental and DNS (direct numerical simulation) results and display an inverse correlation with the integral length scale when normalized by the laminar flame thickness.
Recommended Content
Citation
Smallwood, G. and Deschamps, B., "Flame Surface Density Measurements with PLIF in an SI Engine," SAE Technical Paper 962088, 1996, https://doi.org/10.4271/962088.Also In
References
- zur Loye, A. O. Bracco, F. V. Combust. Flame 69 59 69 1987
- Hale, M. J. Bracco, F. V. SAE Paper No. 870453 1987
- Mantzaras, J. Felton, P. G. Bracco, F. V. Combust. Flame 77 295 310 1989
- Gill, A. Gutheil, E. Warnatz, J. Third COMODIA 94 JSME 1994 583 588
- Boudier, P. Henriot, S. Poinsot, T. Baritaud, T. Twenty-Fourth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1993 503 510
- Maly, R. R. Twenty-Fifth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1995 111 124
- Bray, K. N. C. in Complex Chemical Reactive Systems Warnatz J. Jäger W. Springer-Verlag 1987 356 375
- Cant, R. S. Bray, K. N. C. Twenty-Second Symposium (International) on Combustion The Combustion Institute Pittsburgh 1987 791 799
- Peters, N. Twenty-First Symposium (International) on Combustion The Combustion Institute Pittsburgh 1987 1231 1250
- Miles, P. C. Gouldin, F. C. Twenty-Fourth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1993 477 484
- Veynante, D. Duclos, J. M. Piana, J. Twenty-Fifth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1995 1249 1256
- Deschamps, B. Boukhalfa, A. Chauveau, C. Gökalp, I. Shepherd, I. G. Cheng, R. K. Twenty-Fourth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1993 469 475
- Deschamps, B. M. Smallwood, G. J. Prieur, J. Snelling, D. R. Gülder, Ö.L. Surface Density Measurements of Turbulent Premixed Flames in a Spark-Ignition Engine and a Bunsen-type Burner using Planar Laser-Induced Fluorescence Twenty-Sixth Symposium (International) on Combustion The Combustion Institute Pittsburgh
- Baritaud, T. A. SAE Paper No. 892098 1989
- Baritaud, T. A. Heinze, T. SAE Paper No. 922355 1992
- Le Coz, J.-F. Experimental Study of Effect of Flow Field and Gas Mixture Homogeneity at Spark Timing on Cyclic Variations 1992
- Lengyel, I. Caractérisation des Echelles de Longueur Turbulentes dans la Chambre d'un Moteur à Combustion Interne Ecole Centrale de Lyon Lyon, France 1995
- Fraser, R. A. Bracco, F. V. SAE Paper No. 890615 1989
- Frei, W. Chen, C. IEEE Trans. Computers 26 988 998 1977
- Shepherd, I. G. Ashurst, W. T. Twenty-Fourth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1993 485 491
- Bray, K. N. C. Libby, P. A. Moss, B. J. Combust. Sci. Tech. 41 143 172 1984
- Bray, K. N. C. Champion, M. Libby, P. A. Turbulent Reacting Flows Lecture in Engineering Springer-Verlag New York 1989 40
- Mounaïm-Rousselle, C. Gökalp, I. Twenty-Fifth Symposium (International) on Combustion The Combustion Institute Pittsburgh, 1995 1199 1205
- Trouvé, A. Poinsot, T. J. Fluid Mech. 278 1 31 1994
- Trouvé, A. Private Communication April 1996