When requiring quantitative data on delta-wing vortices for design purposes, low-speed results have often been extrapolated to configurations intended for supersonic operation. This practice stems from a lack of database owing to difficulties that plague measurement techniques in high-speed flows. In the present paper an attempt is made to examine this practice by comparing quantitative data on the nearwake properties of such vortices in incompressible and supersonic flows. The incompressible flow data are obtained in experiments conducted in a low-speed wind tunnel. Detailed flow-field properties, including vorticity and turbulence characteristics, obtained by hot-wire and pressure probe surveys are documented. These data are compared, wherever possible, with available data from a past work for a Mach 2.49 flow for the same wing geometry and angles-of-attack. The results indicate that quantitative similarities exist in the distributions of total pressure and swirl velocity. However, the streamwise velocity of the core exhibits different trends. The axial flow characteristics of the vortices in the two regimes are examined, and a candidate theory is discussed.


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    Titel :

    A Quantitative Comparison of Leading-edge Vortices in Incompressible and Supersonic Flows


    Beteiligte:
    Wang, F. Y. (Autor:in) / Milanovic, I. M. (Autor:in) / Zaman, K. B. M. Q. (Autor:in)

    Kongress:

    40th AIAA Aerospace Sciences Meeting and Exhibit ; 2002 ; Reno, NV, United States


    Erscheinungsdatum :

    2002-01-01


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



    Measurements of leading edge vortices in a supersonic stream

    Milanovic, Ivana / Kalkhoran, Iraj | AIAA | 2000



    A study of Supersonic leading-edge flows

    Fulker, J. L. / Ashill, P. R. / Shires, A. et al. | British Library Conference Proceedings | 1995


    Computation of leading edge vortices

    KRAUSE, E. / SHI, X.-G. / HARTWICH, P.-M. | AIAA | 1983