Flow-induced vibrations of low aspect ratio rectangular membrane wings


Rojratsirikul, P., Genc, M. S., Wang, Z. and Gursul, I., 2011. Flow-induced vibrations of low aspect ratio rectangular membrane wings. Journal of Fluids and Structures, 27 (8), pp. 1296-1309.

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    An experimental study of a low aspect ratio rectangular membrane wing in a wind tunnel was conducted for a Reynolds number range of 2.4104-4.8104. Time-accurate measurements of membrane deformation were combined with the flow field measurements. Analysis of the fluctuating deformation reveals chordwise and spanwise modes, which are due to the shedding of leading-edge vortices as well as tip vortices. At higher angles of attack, the second mode in the chordwise direction becomes dominant as the vortex shedding takes place. The dominant frequencies of the membrane vibrations are similar to those of two-dimensional membrane airfoils. Measured frequency of vortex shedding from the low aspect ratio rigid wing suggests that membrane vibrations occur at the natural frequencies close to the harmonics of the wake instabilities. Vortex shedding frequency from rigid wings shows remarkably small effect of aspect ratio even when it is as low as unity.


    Item Type Articles
    CreatorsRojratsirikul, P., Genc, M. S., Wang, Z. and Gursul, I.
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    URLURL Type
    DepartmentsFaculty of Engineering & Design > Mechanical Engineering
    Research CentresAerospace Engineering Research Centre
    Publisher StatementGursul_JFS_2011.pdf: NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Fluids and Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Fluids and Structures, VOL 27, ISSUE 8, (2011), DOI 10.1016/j.jfluidstructs.2011.06.007
    ID Code25022


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