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  • MECHANICS  (1)
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    Reduction of Vane Noise in Wind-Tunnel Nozzles (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Vane-induced noise reduced by adhering thin layer of porous material such as foam to downwind surface of vanes, particularly near sharp trailing edges, to prevent occurrence of edge tones. Other modifications made to aerodynamically streamline vane structure were rounding leading edges and smoothly fairing trailing edges. Boundary layer trip applied to leading edge to prevent laminar tone shedding from trailing edge.
    Keywords: MECHANICS
    Type: LAR-13333 , NASA Tech Briefs (ISSN 0145-319X); 9; 4; P. 143
    Format: text
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    NASA TECHNICAL REPORTS
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