Both the large turbulence structures and the fine scale turbulence of the flows of supersonic jets are sources of turbulent mixing noise. At moderately high supersonic Mach numbers especially for hot jets, the dominant part of the noise is generated directly by the large turbulent structures. The large turbulence structures propagate downstream at supersonic velocities relative to the ambient sound speed. They generate strong Mach wave radiation analogous to a supersonically travelling wavy wall. A stochastic instability wave model theory of the large turbulence structures and noise of supersonic jets has recently been developed. The theory can predict both the spectrum and directivity of the dominant part of supersonic jet noise up to a multiplicative empirical constant. Calculated results agree well with measurements.


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    Titel :

    Physics and prediction of supersonic jet noise


    Weitere Titelangaben:

    Zur Physik und zur Voraussage von Überschall-Düsenlärm


    Beteiligte:
    Tam, C.K.W. (Autor:in)

    Erschienen in:

    Applied Mechanics Reviews ; 47 , 6 Part 2 ; S184-S187


    Erscheinungsdatum :

    1994


    Format / Umfang :

    4 Seiten, 2 Bilder, 24 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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