Most previous studies of the drag of two-dimensional airfoils consider only the total drag. The present report gives results of a study of three airfoils, using the Eppler program, to determine the distribution of friction drag along the chord and to obtain relative values of friction drag and pressure drag over a wide range of angle of attack and Reynolds number. The effects of boundary-layer suction in the turbulent region of the boundary layer of two of the airfoils are also investigated.The pressure drag is found to be an important component of the total drag, reaching values of 60 to 80 percent of the total drag near the stall. The use of suction producing a uniform inflow in the turbulent region of the boundary layer results in large increases in maximum lift, and increases the skin-friction drag but reduces or even changes the sign of the pressure drag.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Studies of Friction Drag and Pressure Drag of Airfoils Using the Eppler Program


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Aerospace Technology Conference and Exposition ; 1988



    Publication date :

    1988-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Low-drag and suction airfoils

    Goldstein, S. | Engineering Index Backfile | 1948


    Low-drag and suction airfoils

    Goldstein, S. | Engineering Index Backfile | 1948


    Supersonic Channel- Airfoils for Reduced Drag

    Ruffin, S. M. / Gupta, A. / AIAA | British Library Conference Proceedings | 1997


    Supersonic channel airfoils for reduced drag

    Ruffin, S.M. / Gupta, A. / Marshall, D. | Tema Archive | 2000


    Low drag high restoring moment airfoils

    MATALANIS CLAUDE G / WAKE BRIAN E | European Patent Office | 2015

    Free access