A model based on Representative Interactive Flamelets (RIF) for simulating ignition, combustion and emissions formation in a DI diesel engine has been applied to describe the combustion process in the Ford DIATA engine. Equipped with a common-rail injection system the four-valve, turbocharged engine with a displacement of 300 cc per cylinder represents a modern HSDI small-bore diesel engine. The RIF-model offers a way of decoupling the turbulent time scales from those associated with the chemistry. The turbulent flow field was solved using the three-dimensional CFD-code KIVA 3V and the chemistry was solved in a one-dimensional flamelet code rendering profiles of species mass fractions as a function of the mixture fraction, which is a conserved scalar. This decoupling enabled a detailed reaction mechanism comprising 118 species and 557 elementary reactions to be employed without imposing a significant penalty on the computational time. Model predictions of crank angle resolved in-cylinder pressure and NOx emissions are compared with experimental data taken from a single-cylinder test engine varying injection timing and EGR. The agreement between simulations and experiments is found to be very good.


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    Title :

    Modeling the Combustion in a Small-Bore Diesel Engine Using a Method Based on Representative Interactive Flamelets


    Additional title:

    Sae Technical Papers


    Contributors:
    Hergart, C. (author) / Barths, H. (author) / Peters, N. (author)

    Conference:

    International Fuels & Lubricants Meeting & Exposition ; 1999



    Publication date :

    1999-10-25




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English






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