Abstract An experiment was carried out in a low-speed wind tunnel to study the turbulence structure of the boundary layer over a two-dimensional square cavity on a flat plate. The main purpose of this investigation is to examine the way a square cavity modifies the near-wall structure of the turbulent boundary layer leading to a possible drag reduction over d-type roughness. The experimental results on pressure coefficient and friction coefficient indicated a small reduction in total drag in this configuration. This seems to be due to the stable vortex flow observed within the cavity which absorbs and reorganizes the incoming turbulence in the cavity, thereby modifying the near-wall turbulence structure of the boundary layer. The resultant turbulence structure was very similar to that over drag-reducing riblets surface.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Possibility of drag reduction using d-type roughness


    Beteiligte:
    Choi, K.-S. (Autor:in) / Fujisawa, N. (Autor:in)


    Erscheinungsdatum :

    01.01.1993


    Format / Umfang :

    10 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Drag Reduction on Blunt-Based Vehicles Using Forebody Surface Roughness

    Stephen A. Whitmore / Jonathan W. Naughton | AIAA | 2002


    Wind-Tunnel Investigations of Blunt-Body Drag Reduction Using Forebody Surface Roughness

    Whitmore, S. A. / Sprague, S. / Naughton, J. W. et al. | British Library Conference Proceedings | 2001


    Evaluation of Structured Roughness for Separation Control and Drag Reduction

    Smith, Brian R. / Baker, Wendell / Yagle, Pat | AIAA | 2017


    Wind-tunnel investigations of blunt-body drag reduction using forebody surface roughness

    Whitmore, Stephen / Sprague, Stephanie / Naughton, Jonathan | AIAA | 2001