Determination of physical nature of compressibility burble from simultaneous air-flow photographs and pressure-distribution measurements of NACA 4412 airfoil at high speeds; pressure-measurement results and typical Schlieren photographs; source of increased drag is compression shock that occurs, excess drag being due to conversion of considerable amount of air-stream kinetic energy into heat at compression shock.


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    Title :

    Compressibility burble


    Additional title:

    Nat Advisory Committee Aeronautics -- Tech Note


    Contributors:
    Stack, J. (author)


    Publication date :

    1935


    Size :

    10 pages


    Remarks:

    11 Supp Sheets, Bibliography


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English


    Keywords :