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Experimental verification of an Oseen flow slender body theory

Chadwick, EA, Khan, HM, Moatamedi, M, Mappin, MH and Penney, MA 2010, 'Experimental verification of an Oseen flow slender body theory' , Journal of Fluid Mechanics, 654 , pp. 271-279.

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    Abstract

    Consider uniform flow past four slender bodies with elliptical cross-section of constant ellipticity along the length of 0, 0.125, 0.25 and 0.375, respectively, for each body. Here, ellipticity is defined as the ratio of the semiminor axis of the ellipse to the semimajor axis. The bodies have a pointed nose which gradually increases in cross-section with a radius of curvature 419mm to a mid-section which then remains constant up to a blunt end section with semimajor axis diameter 160 mm, the total length of all bodies being 800 mm. The bodies are side-mounted within a low-speed wind tunnel with an operational wind speed of the order 30ms−1. The side force (or lift) is measured within an angle of attack range of −3◦ to 3◦ such that the body is rotated about the major axis of the ellipse cross-section. The lift slope is determined for each body, and how it varies with ellipticity. It is found that this variance follows a straight line which steadily increases with increasing ellipticity. It is shown that this result is predicted by a recently developed Oseen flow slender body theory, and cannot be predicted by either inviscid flow slender body theory or viscous crossflow theories based upon the Allen and Perkins method.

    Item Type: Article
    Themes: Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
    Journal or Publication Title: Journal of Fluid Mechanics
    Publisher: Cambridge University Press
    Refereed: Yes
    ISSN: 0022-1120
    Depositing User: Users 29196 not found.
    Date Deposited: 18 Apr 2012 15:11
    Last Modified: 20 Aug 2013 18:25
    URI: http://usir.salford.ac.uk/id/eprint/21099

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