A two-dimensional model for the simulation of flow and premixed combustion in engines is extended to include a knock sub-model. An autoignition model based upon a degenerately branched chain mechanism /14/ was modified for this purpose. Rapid-compression machine experiments could be reproduced as well as engine knocking tendencies. The coexistence of the new knock model and the overall combustion model of Arrhenius type was arranged by a suitable switch-off criterion for the autoignition reactions. Simulation of pressure waves and respective flowfields under knocking conditions are also shown to be possible. A parametric study of the influence of engine geometry, EGR and swirl on knocking tendency is presented.


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    Title :

    Multidimensional Modelling of Knocking Combustion in SI Engines


    Additional title:

    Sae Technical Papers


    Contributors:
    Schäpertöns, H. (author) / Lee, W. (author)

    Conference:

    SAE International Congress and Exposition ; 1985



    Publication date :

    1985-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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