A numerical methodology to simulate the high pressure spray evolution and the fuel-air mixing in diesel engines is presented. Attention is focused on the employed atomization model, a modified version of the Huh and Gosman, on the definition of a turbulence length scale limiter and of an adaptive local mesh refinement technique to minimize the result grid dependency. All the discussed models were implemented into Lib-ICE, which is a set of libraries and solvers, specifically tailored for engine simulations, which runs under the open-source CFD technology OpenFOAM®.To provide a comprehensive assessment of the proposed methodology, the validation procedure consisted into simulating, with a unique and coherent setup of all models, two different sets of experiments: a non-evaporating diesel fuel spray in a constant-volume vessel with optical access and an evaporating non-reacting diesel fuel spray in an optical engine. The first of these experiments were carried out by the authors by analyzing optical pictures of the jets taken at different instants by imaging technique. A Common-Rail-based injection apparatus was used for injecting commercial diesel fuel at pressures ranging from 50 to 123 MPa inside a constant volume vessel at engine-like density conditions and operating in single shot mode. Literature data were then used to validate the vapor fuel-air mixing at engine conditions.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Experimental and Numerical Investigation of High-Pressure Diesel Sprays with Multiple Injections at Engine Conditions


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE 2010 World Congress & Exhibition ; 2010



    Erscheinungsdatum :

    2010-04-12




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Theoretical and Experimental Analysis of Diesel Sprays behavior from Multiple Injections Common Rail System

    Giuffrida, A. / Corcione, G. E. / Lanzafame, R. et al. | SAE Technical Papers | 2002



    Numerical and experimental analysis of multiple injection diesel sprays

    Allocca,L. / Corcione,F.E. / Costa,M. et al. | Kraftfahrwesen | 2004


    Numerical and Experimental Analysis of Multiple Injection Diesel Sprays

    Corcione, F. E. / Allocca, L. / Costa, M. | SAE Technical Papers | 2004