Two turbulence models have been studied to determine which of the models should be used in further Computational Fluid Dynamics (CFD) research. A zero-equation turbulence model, Baldwin-Lomax (B-L), is easy to use, requires no history of the flow, and requires little in the way of additional computations or additional computer memory space [1]. A two-equation k-ε model, Yang-Shih (Y-S), is more difficult to implement, does require flow history, and requires many more computations and much more computer space; however, it is potentially more accurate than the B-L model [2]. Using both Navier-Stokes (NS) and Parabolized Navier-Stokes (PNS) solvers, the two models and their codes were validated against the testbed of the Wright Laboratory (WL) Mach 12 wind tunnel nozzle. Nozzle flow solution wall data and exit data were compared with experimentally obtained nozzle data, with the surprising result that the B-L model provided the more accurate solution, making it the chosen turbulence model for further nozzle research.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Comparative Study of Turbulence Models in Axisymmetric Nozzle Flow


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Aerospace Atlantic Conference & Exposition ; 1995



    Erscheinungsdatum :

    1995-05-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Mach Disk from Underexpanded Axisymmetric Nozzle Flow

    I.SHIH CHANG AND W.L. CHOW | AIAA | 1974



    Mach disk from underexpanded axisymmetric nozzle flow

    Chang, I.-S. / Chow, W. L. | NTRS | 1974



    A Comparative Study of Turbulence Models for Junction Flow

    Paciorri, Renato / Di Mascio, Andrea / Favini, Bernardo | AIAA | 2002