The goal of this research is the control of leading-edge vortex breakdown location utilizing along-the-core blowing near the apex on the leeward surface of sharp-edged, slender, delta wings at high angles of attack. In the S2Ch subsonic wind tunnel at ONERA Chalais-Meudon, two delta wing models with 70-deg sweep angles and root chords of 950 mm have been configured to collect qualitative and quantitative surface and flowfield data. First, an examination of the streamwise, time-dependent oscillation of the leading-edge vortex breakdown locations without active flow control is presented. These results further the understanding of the vortex breakdown phenomena and provide a more precise basis for evaluating the effectiveness of various flow control methods. Second, open-loop blowing along one of the vortex cores on the leeward surface of the delta wing demonstrates the ability to displace downstream the controlled, time-averaged, vortex breakdown location by 20% of the root chord.


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    Title :

    Oscillation of vortex breakdown location and blowing control of time-averaged location


    Additional title:

    Periodische Längenänderung von Längswirbeln auf der Saugseite von Deltaflügeln und ihre Beeinflussung durch das Einblasen von Luft


    Contributors:
    Mitchell, A.M. (author) / Barberis, D. (author) / Molton, P. (author) / Delery, J. (author)

    Published in:

    AIAA Journal ; 38 , 5 ; 793-803


    Publication date :

    2000


    Size :

    11 Seiten, 13 Bilder, 1 Tabelle, 43 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Oscillation of Vortex Breakdown Location and Blowing Control of Time-Averaged Location

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