The adverse effect of wind-tunnel noise on boundary-layer transition is considered, and the development of Pilot Quiet Tunnels exhibiting low noise levels in upstream regions of the test rhombus to high values of the stream unit Reynolds number is covered. Advances in quiet nozzle and tunnel designs are discussed, including a new Mach-8 nozzle and modifications to an existing conical nozzle in one of the helium tunnels at NASA Langley. Attention is focused on the final engineering design of a large-scale high-speed low-disturbance tunnel expected to accommodate nozzles of various lengths with Mach numbers ranging from 2 to 6.


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    Titel :

    High-speed quiet tunnels


    Beteiligte:

    Kongress:

    Instability and Transition ; 1989 ; Hampton, VA, United States


    Erscheinungsdatum :

    1990-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




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