TURBULENT TRANSITION PROCESS OF THE SPIRAL VORTICES APPEARING IN THE LAMINAR BOUNDARY LAYER OF A ROTATING CONE.

Yasuaki Kohama

    Research output: Contribution to journalConference articlepeer-review

    13 Citations (Scopus)

    Abstract

    The behaviour of horse-shoe like vortices (H-S vortices), which appear on the surfaces of spiral vortices in the laminar boundary-layer of a rotating cone, are experimentally investigated in detail using a drum camera and a light sheet illumination system with a stroboscope flash light. With this method, the time dependent turbulent transition processes of these H-S vortices are greatly clarified. The results show that the H-S vortices, which are traveling along the spiral vortices with certain phase velocity, are generated by steep shear velocity profiles with an inflexion point which is created by the existence of the spiral vortices. This work is pertinent to heat transfer and aerodynamics.

    Original languageEnglish
    Pages (from-to)659-669
    Number of pages11
    JournalPCH. Physicochemical hydrodynamics
    Volume6
    Issue number5-6
    Publication statusPublished - 1984 Dec 1
    EventPhysicochem Hydrodyn, 5th Int Conf - Tel Aviv, Isr
    Duration: 1984 Dec 161984 Dec 21

    ASJC Scopus subject areas

    • Engineering(all)

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