External aerodynamics remains one of the major concerns in designing a new generation road vehicle. In the present study, the external aerodynamics of an Ahmed body at a scale and Reynolds number, that are representative of a car or light truck at highway speeds, is explored. An experimental model test was compared with a computational model using various back angles. In addition, the experiment allowed lift and drag to be measured at yaw angles up to ±15 degrees. Reynolds number effect on drag and lift coefficients was studied and wind averaged drag coefficients were calculated. The numerical calculations used a Reynolds-averaged, unsteady Navier-Stokes formulation. Both experimental and computational results are presented for back angles of 0-, 12.5-, and 25-degrees, then compared with each other and the data available in the literature.


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    Titel :

    Experimental and Computational Investigation of Ahmed Body for Ground Vehicle Aerodynamics


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Landman, Drew (Autor:in) / Bayraktar, Ilhan (Autor:in) / Baysal, Oktay (Autor:in)

    Kongress:

    International Truck & Bus Meeting & Exhibition ; 2001



    Erscheinungsdatum :

    2001-11-12




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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