A prediction model of the cycle-to-cycle variation of the in-cylinder flow in IC engines which employs the time averaged k-ε turbulence model is proposed. The concept is based on an assumption that the power spectrum of the cycle-to-cycle variation can be deduced from the power spectra of both the mean velocity and turbulence intensity. To validate this model, in-cylinder velocity measurement in a transparent cylinder engine with a 2-valve cylinder-head is made using an LDV system. Comparisons of in-cylinder flow fields between the calculation and measurement show a good agreement in the cycle-to-cycle variation as well as the turbulence intensity. Finally, this model is applied to three kinds of flow fields to examine how the cycle-to-cycle variation may be effected. As a result, it is found that the swirl flow is effective to reduce the cycle-to-cycle variation, while the tumbling flow enhances the turbulence generation around the compression TDC.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Prediction of Cycle-to-Cycle Variation of In-Cylinder Flow in a Motored Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Yagita, Miki (Autor:in) / Kamimoto, Takeyuki (Autor:in) / Moriyoshi, Yasuo (Autor:in)

    Kongress:

    International Congress & Exposition ; 1993



    Erscheinungsdatum :

    1993-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Prediction of Cycle-to-Cycle Variation of In-Cylinder Flow in a Motored Engine

    Moriyoshi,Y. / Kamimoto,T. / Yagita,M. et al. | Kraftfahrwesen | 1993





    Piston Lubrication Phenomena In A Motored Glass Cylinder Engine

    CATTANEO, A. G. / BEAUBIEN, S. J. | SAE Technical Papers | 1946