This lecture consists of three parts, in which discussions are presented of the current state of development of transonic or supercritical airfoils designed for fully turbulent boundary layers on the surfaces, previous research on subcritical airfoils designed to achieve laminar boundary layers on all or parts of the surfaces, and current research on supercritical airfoils designed to achieve laminar boundary layers. In the first part the use of available two dimensional computer codes in the development of supercritical airfoils and the general trends in the design of such airfoils with turbulent boundary layers are discussed. The second part provides the necessary background on laminar boundary layer phenomena. The last part, which constitutes the major portion of the lecture, covers research by NASA on supercritical airfoils utilizing both decreasing pressure gradients and surface suction for stabilizing the laminar boundary layer. An investigation of the former has been recently conducted in fight using gloves on the wing panels of the U.S. Air Force F111 TACT airplane, research on the later is currently being conducted in a transonic wind tunnel which has been modified to greatly reduce the stream turbulence and noise levels in the tests section.


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    Title :

    Transonic Airfoil Development


    Contributors:


    Publication date :

    1983-07-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Transonic Airfoil Analysis

    Holst, T. L. / Dougherty, F. C. / Gundy, K. L. et al. | NTRS | 1984


    Transonic airfoil codes

    Garabedian, P. R. | NTRS | 1979


    Transonic airfoil design

    CAHN, M. S. / GARCIA, J. R. | AIAA | 1971


    Transonic airfoil design code

    Bauer, F. / Garabedian, P. / Korn, D. | NTRS | 1980


    On transonic airfoil theory

    Guderley, G. | Engineering Index Backfile | 1956