Boundary-layer transition on axisymmetric bodies at a nonzero angle of attack in Mach 2 supersonic flow was investigated using experimental measurements and linear stability analysis. Transition over four axisymmetric bodies (namely, the Sears–Haack body, the semi-Sears–Haack body, the straight cone, and the flared cone) with different axial pressure gradients was measured in two different facilities with different unit Reynolds numbers. The semi-Sears–Haack body and flared cone were designed specifically to achieve a broader range of axial pressure distributions. Measurements revealed a dramatic effect of body shape on transition behavior near the leeward plane of symmetry. For a body shape with an adverse pressure gradient (that is, a flared cone), the measured transition patterns show an earlier transition location along the leeward symmetry plane in comparison with the neighboring azimuthal locations. For a nearly zero pressure gradient (that is, the straight cone), such leeward-first transition is observed only at the larger unit Reynolds number. Finally, transition occurs farther downstream along the leeward plane for the remaining two body shapes with a favorable pressure gradient. The observed transition patterns are partially consistent with the numerical predictions based on linear stability analysis.


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    Titel :

    Pressure Gradient Effects on Supersonic Transition over Axisymmetric Bodies at Incidence


    Beteiligte:
    Tokugawa, Naoko (Autor:in) / Choudhari, Meelan (Autor:in) / Ishikawa, Hiroaki (Autor:in) / Ueda, Yoshine (Autor:in) / Fujii, Keisuke (Autor:in) / Atobe, Takashi (Autor:in) / Li, Fei (Autor:in) / Chang, Chau-Lyan (Autor:in) / White, Jeffery (Autor:in)

    Erschienen in:

    AIAA Journal ; 53 , 12 ; 3737-3751


    Erscheinungsdatum :

    2015-09-03


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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    Tokugawa, N. / Choudhari, M. / Ishikawa, H. et al. | British Library Conference Proceedings | 2012


    Transition Within Leeward Plane of Axisymmetric Bodies at Incidence in Supersonic Flow

    Tokugawa, N. / Choudhari, Meelan / Ishikawa, Hiroaki et al. | AIAA | 2012


    Energy Deposition Influence on Supersonic Flow Over Axisymmetric Bodies

    Zheltovodov, Alexander / Pimonov, E. / Knight, Doyle | AIAA | 2007