The measurement of transfer port efflux velocities using laser doppler velocimetry (LDV) in a motored model two-stroke engine is described. The single cylinder engine used is of two port loop scavenged design, externally blown to provide scavenge flow into the cylinder during the entire port open period. LDV measurements were taken along a vertical path, central to the transfer duct, at the port exit over a range of crankangles at motoring speeds of 225rpm, 600rpm, and 900rpm. At 225rpm further measurements were taken for a range of delivery ratios from 0.7 to 2.0. Relatively uniform velocity profiles indicate plug like flow issuing from the port under most conditions. The resultant flow direction is seen never to align with the transfer duct walls, but to vary as a function of crankangle. Quantitative analysis of angles defining mean flow direction reveal that dynamic efflux behaviour is essentially similar for all tested speeds and delivery ratios.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    LDV Measurement of Transfer Port Efflux Velocities in a Motored Two-Stroke Cycle Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    McKinley, N. R. (Autor:in) / Fleck, R. (Autor:in) / Kenny, R. G. (Autor:in)

    Kongress:

    International Off-Highway & Powerplant Congress & Exposition ; 1992



    Erscheinungsdatum :

    01.09.1992




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    LDV Measurement of Transfer Port Efflux Velocities in a Motored Two-Stroke Cycle Engine

    McKinley,N.R. / Fleck,R. / Kenny,R.G. et al. | Kraftfahrwesen | 1992


    Comparison of motored and fired velocities in a two stroke engine

    Ghandhi,J.B. / Miller,S.L. / Univ.of Wisconsin-Madison,US et al. | Kraftfahrwesen | 1998


    Comparison of Motored and Fired Velocities in a Two Stroke Engine

    Ghandhi, J. B. / Miller, S. L. | SAE Technical Papers | 1998


    Scavenging flow measurement on an motored two-stroke engine by fiber LDV

    Ikeda,Y. / Hikosaka,M. / Nakajima,T. et al. | Kraftfahrwesen | 1991