Over the past decades substantial advances have been made in reducing the drag of automobiles. As might have been expected, the early performance gains were relatively easy but future gains are becoming increasingly difficult to achieve. A diagnostic method which is both quantitative and independent of the model is sorely needed. This paper discusses experimental measurements of wakes behind. 154-scale model production cars and comparisons to balance measurements. Models, test equipment, and data analysis are discussed. Explanations of the wake flow results in relation to the car modifications are included. Correlation of the wake drag integral to the balance drag measurement is good; however, some questions remain relative to the influence of fixed-ground skin friction.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wake Traverses Behind Production Cars and Their Interpretation


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1985



    Publication date :

    1985-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Wake traverses behind production cars and their interpretation

    Hackett,J.E. / Williams,J.E. / Patrick,J. et al. | Automotive engineering | 1985


    The Wake behind Passenger Cars with Different Rear Ends

    Kramer,G. / Gerhardt,H.J. / Fachhochsch.Aachen,Lab.f.Stroem.-Mech. | Automotive engineering | 1980


    Chemins de traverses

    Perrin, Gilbert | TIBKAT | 1993


    A simple method of computing Cd from Wake traverses at highsubsonic speeds

    Thompson, J. S. / Aeronautical Research Council | TIBKAT | 1954