Noise and flow data have been acquired for a 16:1 aspect ratio rectangular nozzle exhausting near a simple surface at the NASA Glenn Research Center as part of an ongoing effort to understand, model, and predict the noise produced by current and future concept aircraft employing a tightly integrated engine airframe designs. The particular concept under consideration in this experiment is a blended-wing-body airframe powered by a series of electric fans exhausting through slot nozzle over an aft deck. The exhaust Mach number and surface length were parametrically varied during the test. Far-field noise data were acquired for all nozzle surface geometries and exhaust flow conditions. Phased-array noise source localization data and in-flow pressure data were also acquired for a subset of the isolated (no surface) and surface configurations; these measurements provide data that have proven useful for modeling the jet-surface interaction noise source and the surface effect on the jet-mixing noise in round jets. A summary of the nozzle surface geometry, flow conditions tested, and data collected are presented.


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    Title :

    Jet-Surface Interaction Noise from High-Aspect Ratio Nozzles: Test Summary


    Contributors:

    Conference:

    AIAA Aviation Technology, Integration, and Operations Conference ; 2017 ; Denver, CO, United States


    Publication date :

    2017-06-05


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English