The effects of two types of intake ports on the in-cylinder bulk flow and turbulence structure were investigated in steady flow tests by using laser doppler anemometry. The results, obtained at constant mass flow-rate in a plane 15 mm or 0.19 bore diameters from the cylinder head, confirmed the expected differences in the tangential flow pattern, but revealed similarity in the axial velocity distribution characterized by a large recirculation zone (RZ) attached to the inlet valve. In both cases the turbulence was found higher, more inhomogeneous and more non-isotropic in the regions of positive axial flow than in the RZ. Localized highly turbulent conditions have been identified and characterized as a consequence of bi-modal probability distribution functions (pdf) of velocity and aperiodic oscillations from one velocity regime to another. The utility of the present steady flow results in designing internal combustion engines must be assessed under motored conditions, but their implications on turbulence generation and development should be considered.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effects of Intake Ports on the In-Cylinder Air Motion under Steady Flow Conditions


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Coghe, Aldo (Autor:in) / Tassi, Eros (Autor:in) / Brunello, Gianni (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1988



    Erscheinungsdatum :

    01.02.1988




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Effects of intake ports on the in-cylinder air motion under steady flow conditions

    Coghe,A. / Brunello,,G. / Tassi,E. et al. | Kraftfahrwesen | 1988


    In-Cylinder Air Motion Measurements by Laser Velocimetry under Steady-State Flow Conditions

    Cogne, Aldo / Gamma, Fausto / Calderini, Fusco et al. | SAE Technical Papers | 1985


    In-Cylinder Air Motion Measurements by Laser Velocimetry under Steady-State Flow Conditions

    Coghe,A. / Gamma,F. / Mauri,M. et al. | Kraftfahrwesen | 1985


    Intake Ports Development: Euro IV Diesel Engine Cylinder Head

    Barbieri, Frederico Augusto A. / Squaiella, Lucas Lázaro F. / Sassake, Ricardo et al. | SAE Technical Papers | 2008


    Intake Ports Development: Euro IV Diesel Engine Cylinder Head

    Andreatta, E.C. / Barbieri, F.A.A. / Squaiella, L.L.F. et al. | British Library Conference Proceedings | 2008