Abstract Cavities and other surface cut-outs are present on aircraft in numerous forms, from cargo bays and landing gear housing to rivet depressions and panel handles. Although these surface imperfections make a significant contribution to the overall drag on an aircraft, relatively little is known about the flow mechanisms associated with cavities, particularly those which have a strongly three-dimensional geometry. The present work is a wind tunnel investigation of the drag forces and flow regimes associated with cavities having a 2:1 rectangular planform geometry. The effects of both the cavity depth and the flow incidence angle have been examined in terms of the overall cavity drag increment and the mean surface pressure distributions. The drag forces have been determined from both integrated pressures and direct force balance measurements. For the model normal to the flow direction the flow within the cavity was remarkably symmetrical in all the configurations examined. In most cases the cavity flow is dominated by a single large eddy. However, for cavities yawed to other incidence angles there is considerable flow asymmetry, with strong vorticity shedding and high drag in some cases, notably with depth/narrowest width ratio of 0.4—0.5 at 45—60° incidence. The present data correspond well with established results and extend the scope of information available for design purposes and for the development of numerical models.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The drag of three-dimensional rectangular cavities


    Beteiligte:
    Savory, Eric (Autor:in) / Toy, Norman (Autor:in) / Disimile, Peter J. (Autor:in) / Dimicco, Russell G. (Autor:in)


    Erscheinungsdatum :

    01.01.1993


    Format / Umfang :

    22 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    DRAG AND FLOW REGIMES ASSOCIATED WITH RECTANGULAR CAVITIES AT YAW AT LOW SPEEDS

    Gai, S.L. / Soper, T.J. / International Council of the Aeronautical Sciences | British Library Conference Proceedings | 2008


    ICAS2016_0606: STAGGERED THREE-DIMENSIONAL CAVITIES AS A POSSIBLE METHOD FOR SKIN FRICTION DRAG REDUCTION

    Gowree, E. R. / Atkin, C. J. | British Library Conference Proceedings | 2016



    Drag reduction utilizing driven micro-cavities

    RIGGINS DAVID W | Europäisches Patentamt | 2016

    Freier Zugriff