The accuracy of the Lattice-Boltzmann based simulation method for prediction of aerodynamic drag on a heavy truck was evaluated by comparing results to twenty percent scale model wind tunnel measurements from the University of Washington Aeronautical Laboratory (UWAL). A detailed preproduction Kenworth T2000 tractor trailer was used as the scale model. The results include a comparison of normalized drag between simulation and wind tunnel as well as percentage drag change with the addition of a radius to the rear edge of the trailer. Significant effort was involved to model all of the wind tunnel details affecting the tractor-trailer drag. These are discussed along with the results of additional simulations which were performed to study the impact of the UWAL tunnel geometry relative to a tunnel with the same blockage and constant cross-sectional area, and a case with negligible blockage. Advanced post-processing of the simulation results was used to study the drag contribution from the trailer features including underbody, rear bumper, and bogie wheel assembly.


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    Titel :

    Aerodynamic Simulations of a Class 8 Heavy Truck: Comparison to Wind Tunnel Results and Investigation of Blockage Influences


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Wong, Alec (Autor:in) / Gupta, Anurag (Autor:in) / Duncan, Brad (Autor:in) / Horrigan, Kevin (Autor:in) / Sivakumar, Pradeep (Autor:in)

    Kongress:

    SAE 2007 Commercial Vehicle Engineering Congress & Exhibition ; 2007



    Erscheinungsdatum :

    2007-10-30




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch