Experiments were performed to simulate jet plume effects associated with VTOL aircraft in takeoff and cruise modes. A water facility was used to investigate the influence of inclination angle and separation distance on the three-dimensional fountain flowfield generated by two impinging jets operating at a jet Reynolds number of 250,000. Substantial differences in the flow features were observed for different spacings between the jets. Plume effects in cruise mode were simulated by a supersonic unheated jet parallel to a wall. Variation of the distance between the wall and the edge of the plume is shown to have a major controlling effect on the supersonic screech instability.


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    Title :

    Unsteady Features of Jets in Lift and Cruise Modes for VTOL Aircraft


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Powered Lift Conference and Exposition ; 1987



    Publication date :

    1987-12-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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