Preliminary evaluation of two new cable surface innovations

Celeste Burlina, Christos T. Georgakis, S.V. Larsen, Phillipp Egger

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    Abstract

    In this paper, the aerodynamic performance of two innovative bridge cable surfaces with concave fillets are examined and compared with traditional helical fillets. To this end, an extensive wind-tunnel test campaign was undertaken to measure the aerodynamic static force coefficients up to a Reynolds number of 3.2 x 105. The tests confirmed the results obtained from the preliminary tests performed by Kleissl and Georgakis (2013) on the prototype cable surfaces with the concave fillets. Despite a more than 100% increase of the fillet height compared to a traditional helical fillet profile, the static force coefficients are the same as that of a traditional helical fillet model at high Reynolds numbers. It is hypothesized that this is due to the ability of the concave shape of the fillet to enhance vorticity. Furthermore, both innovations are able to suppress vortex shedding formation at low Reynolds numbers, leading to a smooth and prolonged transition from the subcritical to the postcritical Reynolds number range.
    Original languageEnglish
    Title of host publicationProceedings of the 14th International Conference on Wind Engineering
    Number of pages7
    Publication date2015
    Publication statusPublished - 2015
    Event14th International Conference on Wind Engineering - Porto Alegre, Brazil
    Duration: 21 Jun 201526 Jun 2015
    Conference number: 14
    http://www.icwe14.org/

    Conference

    Conference14th International Conference on Wind Engineering
    Number14
    Country/TerritoryBrazil
    CityPorto Alegre
    Period21/06/201526/06/2015
    Internet address

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