Laser Doppler velocimetry has been used to make cycle-resolved velocity and turbulence measurements in a homogeneous-charge, spark-ignition engine. The engine had a ported intake and disc-shaped chamber with a compression ratio of 8 to 1. It was operated at a speed of 1200 rpm and with a TDC swirl number of 4. A stoichiometric propane-air mixture was used, and ignition was near the wall. The velocity measurements were made at three spatial locations at the midpoint of the clearance height. Tests were made to determine whether the presence of the flame affected the accuracy of the velocity measurements. It was found that the ensemble-averaged mean velocity shows a small deviation, and the rms fluctuation intensity is significantly influenced, but the effects appear to be confined to the flame zone. Data rates were sufficiently high in the preflame and postflame regions to determine the velocity history in each cycle (cycle resolved). The cycle resolved turbulence intensity was found to increase across the flame. The turbulence intensity in the burned gas was found to be homogeneous at the three spatial locations examined and to decay rapidly. There was little or no increase in turbulence intensity ahead of the flame.


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    Titel :

    Cycle-Resolved Velocity and Turbulence Measurements in an IC Engine With Combustion


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Santavicca, D. A. (Autor:in) / Bracco, F. V. (Autor:in) / Hall, M. J. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1986



    Erscheinungsdatum :

    1986-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Cycle-resolved velocity and turbulence measurements in an IC engine with combustion

    Hall,M.J. / Bracco,F.V. / Santavicca,D.A. et al. | Kraftfahrwesen | 1986



    Cycle resolved turbulence measurements in a ported engine with and without swirl

    Liou,T.M. / Santavicca,D.A. / Princeton Univ.,Dep.of Mech.and Aerosp.Engng.,US | Kraftfahrwesen | 1983


    Cycle Resolved Turbulence Measurements in a Ported Engine With and Without Swirl

    Santavicca, D. A. / Liou, T.-M. | SAE Technical Papers | 1983


    Cycle resolved turbulence intensity measurement in internal combustion engines

    Trigui,N. / Choi,W.C. / Guezennec,Y.G. et al. | Kraftfahrwesen | 1996