Riblets on airfoils and wings - A review AIAA Paper 99-3402

Viswanath, P. R (1999) Riblets on airfoils and wings - A review AIAA Paper 99-3402. In: 30th AlAA Fluid Dynamics Conference, 28 June - 1 July, 1999, Norfolk, VA.

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    Abstract

    This review paper summarizes the current status of research on the use of riblets for viscous drag reduction on 2D airfoils and swept wings. These applications have additional effects, such as streamwise pressure gradients and three-dimensionality. The effectiveness of riblets under such conditions are discussed along with associated flow features. Two major observations emerge from the experimental results: first, riblets provide higher drag reduction under adverse pressure gradients; second, the effectiveness of riblets on a moderately swept wing is retained as long as the angle between surface streamlines and riblet orientation is generally small (less than 10 deg). Available results on transonic airfoils show that compressibility effects do not have any adverse effect on riblet action. Finally, the effects of riblets on other engineering parameters, such as lift characteristics and stall angle, are discussed on the basis of the available results. Certain suggestions for future research are outlined.13; 13;

    Item Type: Conference or Workshop Item (Paper)
    Additional Information: AIAA 1999 3402
    Uncontrolled Keywords: Riblets;Airfoils;Wings;Drag Reduction;Viscous Drag;Two Dimensional Bodies;Swept Wingspressure Gradientsthree Dimensional Bodiestransonic Speedindependent Variables.
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Experimental Aerodynamics Division
    Depositing User: Mr. N A
    Date Deposited: 27 Jan 2006
    Last Modified: 24 May 2010 09:39
    URI: http://nal-ir.nal.res.in/id/eprint/994

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