Study on turbulent drag reduction using riblets on a flat plate

Sundaram, S and Viswanath, PR (1992) Study on turbulent drag reduction using riblets on a flat plate. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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    Abstract

    Results of viscous drag reduction on a flat plate using riblets at low speeds are presented. Measurements of mean velocity and streamwise turbulence intensity profiles were made on the riblet surface as well as on the smooth flat plate for one riblet geometry. Drag reduction estimated by applying boundary layer momentum integral technique on the riblet surface as well as from the far wake measurements showed good agreement. Comparisons of spectra of streamwise velocity fluctuations with and without the riblet surface, indicated noticeable reduction in the energy levels in the near wall consistent with earlier observations reported in literature.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Drag reduction;Riblets;Flat plate
    Subjects: AERONAUTICS > Aerodynamics
    Division/Department: Experimental Aerodynamics Division, Experimental Aerodynamics Division
    Depositing User: Deputy Head Poornima Narayana
    Date Deposited: 17 Jul 2006
    Last Modified: 24 May 2010 09:45
    URI: http://nal-ir.nal.res.in/id/eprint/1982

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