Abstract A quasi-dimensional model is developed with the surrogate mechanism of isooctane and n-heptane to predict knock and emissions of a homogeneous GDI engine. It is composed of unburned and burned zone with the latter divided into multiple zones of equal mass to resolve temperature stratification. Combustion is based on turbulent entrainment and burning in a spherically propagating flame with the entrainment rate interpolated between laminar and turbulent flame speed. Validation is performed against measured pressure traces, NOx and CO emissions at different load and rpm conditions. Comparison is made between predictions by the empirical knock model and the chemistry model in this work. There is good agreement for pressure, NOx, CO and knock for the test engine. Promising results are obtained through parametric study with respect to octane number and engine load by the chemistry knock model.


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    Title :

    Quasi-dimensional analysis of combustion, emissions and knocking in a homogeneous GDI engine


    Contributors:
    Lee, J. (author) / Lee, Y. (author) / Huh, K. Y. (author) / Kwon, H. (author) / Park, J. I. (author)

    Published in:

    Publication date :

    2015-05-27


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Quasi-dimensional analysis of combustion, emissions and knocking in a homogeneous GDI engine

    Lee, J. / Lee, Y. / Huh, K. Y. et al. | Online Contents | 2015


    Quasi-dimensional analysis of combustion, emissions and knocking in a homogeneous GDI engine

    Lee, J. / Lee, Y. / Huh, K. Y. et al. | British Library Online Contents | 2015


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    Sokolik, A. / Voinov, A. | Engineering Index Backfile | 1940


    Knocking in an internal-combustion engine

    Sokolik, A. / Voinov, A. | TIBKAT | 1940


    Knocking in an Internal-combustion Engine

    Sokolik, A / Voinov, A | NTRS | 1940