The objective of this viewgraph presentation is to evaluate turbulence models for integrated aircraft components such as the forebody, wing, inlet, diffuser, nozzle, and afterbody. The one-equation models have replaced the algebraic models as the baseline turbulence models. The Spalart-Allmaras one-equation model consistently performs better than the Baldwin-Barth model, particularly in the log-layer and free shear layers. Also, the Sparlart-Allmaras model is not grid dependent like the Baldwin-Barth model. No general turbulence model exists for all engineering applications. The Spalart-Allmaras one-equation model and the Chien k-epsilon models are the preferred turbulence models. Although the two-equation models often better predict the flow field, they may take from two to five times the CPU time. Future directions are in further benchmarking the Menter blended k-w/k-epsilon and algorithmic improvements to reduce CPU time of the two-equation model.


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    Title :

    Applicability of Turbulence Models to Aerodynamic and Propulsion Flowfields at Mcdonnell-Douglas Aerospace


    Contributors:
    L. D. Kral (author) / J. A. Ladd (author) / M. Mani (author)

    Publication date :

    1995


    Size :

    17 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English