An extended mixing-length hypothesis which uses an integral form of the kinetic energy-of-turbulence (IKET) equation has been assessed for its applicability to compressible transpirational or compressible nonadiabatic roughwall boundary-layer flows. Results are presented and discussed for a sharp cone with sand grain roughness and a flat plate with transpiration, both at supersonic Mach numbers, as well as a grit-blasted hemisphere-cylinder in low hypersonic flow. The results indicate that the IKET-based analysis accurately predicts the salient features of both transpirational and rough wall compressible flows. The addition of the IKET equation, which permits the streamwise computation of a parameter normally taken as constant in conventional mixing-length analyses, embodies the extended mixing-length hypothesis with considerably more capability than that possessed by conventional mixing-length approaches.


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    Title :

    Extended mixing-length hypothesis applications to transpired or roughwall compressible boundary layers


    Additional title:

    Erweiterte Mischungsweghypothese: Anwendung bei instationaeren kompressiblen Grenzschichten


    Contributors:
    Hodge, B.K. (author)

    Published in:

    Publication date :

    1978


    Size :

    12 Seiten, 11 Bilder, 2 Tabellen, 42 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English