Laser Doppler velocimeter results are presented for the mean velocity and turbulence intensity measured in a motored research engine. The compression of complex bulk motions created during induction produces turbulence as the piston approaches top dead center. The turbulence field is shown to be isotropic but nonhomogeneous. A zero-dimensional computer simulation based on an averaged k-ϵ model is shown to adequately predict the decay of turbulence at a point in the flow after the production phase is completed.Cylinder pressure measurements were recorded for homogeneous stoichiometric combustion for a range of engine speeds and ignition locations. A two-zone (burned and unburned gases) thermodynamic model accurately predicts the measured pressure histories when the turbulence results determined from the motored tests are used to establish initial conditions for the combustion model.


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    Titel :

    Measurements and Predictions of the Precombustion Fluid Motion and Combustion Rates in a Spark Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Borgnakke, Claus (Autor:in) / Martin, Jay K. (Autor:in) / Witze, Peter O. (Autor:in)

    Kongress:

    1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1983



    Erscheinungsdatum :

    1983-10-31




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    PRECOMBUSTION REACTION IN THE SPARK-IGNITION ENGINE

    Retailliau, Edmond R. / Ricards, Harold A. / Jones, Minor C.K. | SAE Technical Papers | 1950



    Combustion in a PRECOMBUSTION-TYPE DIESEL ENGINE

    BRYAN, HARRY F. | SAE Technical Papers | 1946