The classical theory of wind tunnel corrections calculated from potential flow theory is revisited. In this context a flow model uniformly valid for all types of test sections is developed for the correction of drag in automotive wind tunnels. To define and size the singularities setting up the flow model only geometrical properties of the model and measured force coefficients will be used. To achieve a correct representation of the flow about a vehicle body a number of improvements to the classical approach are proposed. Based on the uniformly valid flow model, correction formulae for closed wall, open jet and slotted wall test sections are given. For the open jet and slotted wall case it is shown, that the presented formulae are still incomplete, whereas for the closed wall case the correction is ready to use. The correction approach is validated step by step by comparison with appropriate experimental data.Possible benefit of the correction is not only the ability to correct for unwanted wall interference effects, but also an improved understanding of wind tunnel test section design items. This can be utilized for an optimized design for new tunnels as well as for improvements of existing facilities.


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    Titel :

    On the Application of Classical Wind Tunnel Corrections for Automotive Bodies


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    SAE 2001 World Congress ; 2001



    Erscheinungsdatum :

    05.03.2001




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    On the application of classical wind tunnel corrections for automotive bodies

    Wickern,G. / Audi,Ingolstadt,DE | Kraftfahrwesen | 2001


    2001-01-0633 On the Application of Classical Wind Tunnel Corrections for Automotive Bodies

    Wickern, G. / SAE | British Library Conference Proceedings | 2001


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    Katzoff, S. | NTRS | 1948


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    Subsonic Wind Tunnel Wall Corrections

    W. E. Acum / H. C. Garner / E. C. Maskell et al. | NTIS | 1966