Görtler vortex system on a wind-tunnel contraction nozzle wall

Satoshi Nagahama, Satoshi Kikuchi, Yasuaki Kohama

    Research output: Contribution to journalArticle

    Abstract

    The boundary layer along a wind-tunnel contraction nozzle is investigate in detail using hotwire anemometry and flow visualization method. It is found that Görtler vortex system exists and develops in the concave wall region of the contraction nozzle. In spite of the flow acceleration by the contraction the disturbance enhanced by the Görtler vortex system travels down even to the test section. We found that this disturbed region at the test section is more than 25% of the cross-sectional area independent of the mean flow velocity. This is due to the large vertical scale of the Görtler vortex system in the concave wall region. This result shows the effects of the Görtler vortex system should be taken into consideration in designing a wind-tunnel contraction nozzle.

    Original languageEnglish
    Pages (from-to)794-800
    Number of pages7
    JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
    Volume69
    Issue number680
    DOIs
    Publication statusPublished - 2003 Apr

    Keywords

    • Boundary layer
    • Görtler vortices
    • Nozzle
    • Turbulence
    • Wind-tunnel

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanical Engineering

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