This paper presents results of a coupling of the Volume-of-Fluid Large-Eddy simulation (VOF-LES) of the jet primary breakup with a Lagrangian stochastic spray simulation of a GDi multi-hole injector. The objective is to assess the potential of replacing the phenomenological models of jet primary atomization with the stochastic parcel size - velocity data extracted from the VOF-LES analysis. The paper describes the methodology and assesses the predictive capability achieved, through comparison of the Lagrangian far-field spray simulation results with the complete experimental spray characterization data under the atmospheric ambient conditions.The injector sac-nozzle flow and jet primary breakup simulation is performed with the Open-FOAM code. The simulation of the spray development processes - of propagation, evaporation and secondary atomization - is performed with the AVL-FIRE commercial CFD code adopting the standard Lagrangian discrete droplet method.The comparison demonstrates good quantitative agreement for prediction of all significant far-field spray plume parameters, notably the trajectory, spread angle, tip penetration, foot-print pattern and the droplet-size probability distribution function.


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    Titel :

    Coupled LES Jet Primary Breakup - Lagrangian Spray Simulation of a GDi Multi-Hole Fuel Injector


    Weitere Titelangaben:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Beteiligte:
    Befrui, Bizhan (Autor:in) / Markle, Lee E. (Autor:in) / D'Onofrio, Mario (Autor:in) / Spiekermann, Peter (Autor:in)

    Kongress:

    SAE 2015 World Congress & Exhibition ; 2015



    Erscheinungsdatum :

    2015-04-14


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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