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.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Flame Surface Density Measurements with PLIF in an SI Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996



    Erscheinungsdatum :

    1996-10-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Flame surface density measurements with PLIF in a spark ignition engine

    Smallwood,G.J. / Deschamps,B.M. / National Research Council Canada,CA et al. | Kraftfahrwesen | 1996


    PLIF imaging measurements in high-pressure spray flame combustion

    Allen, M. / McManus, K. / Sonnenfroh, D. | AIAA | 1994


    Gasoline Distribution Measurements with PLIF in a SI Engine

    Baritaud, T. A. / Heinze, T. A. | SAE Technical Papers | 1992


    Gasoline distribution measurements with PLIF in a spark ignition engine

    Baritaud,T.A. / Heinze,T.A. / Institut Francais Du Petrole,FR | Kraftfahrwesen | 1992


    Flame structure visualization of stratified combustion in a DISI engine via PLIF

    Strand,T.E. / Rothamer,D.A. / Ghandhi,J.B. et al. | Kraftfahrwesen | 2001