An empirical model has been developed that correlates transition due to distributed roughnesses, which range in height over five orders of magnitude. The data base is obtained from wind tunnels, arc heaters, and sounding rockets. The shapes included are hemispheres, biconics, and laminar stable. The corre+ation departs from previous attempts by dividing the body into two distinct regions: a forward region where concave streamline curvature dominates transition, and a following region where streamline curvature is not an influence. Noise is found to have little or no effect, and the extension of the correlation to roughnesses measured in microinches shows no observable smooth wall limit. (DePo)


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    Title :

    Transition induced by distributed roughness on blunt bodies in supersonic flow


    Additional title:

    Durch die Oberflaechenrauhigkeit stumpfer Koerper in Ueberschallstroemungen verursachtes Uebergangsverhalten von Grenzschichten


    Contributors:

    Published in:

    Publication date :

    1976


    Size :

    63 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English