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The effects of attached flexible tail length on the flow structure of an oscillating cylinder

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Abstract

Particle Imaging Velocimetry (PIV) is utilized to investigate the flow structures of an oscillating cylinder attached to a flexible tail. At the same oscillation frequency and amplitude, the mean streamwise velocity along the wake central-line and the mean vertical velocity around the trailing edge of the flexible tail can be greatly increased with the tail length. Meanwhile, the longer the flexible tail is, the larger its deformation is. In order to study the influence of flexible tail length on the wake pattern of the experimental model, the relationships between the swirling strength Λci of vortex structure near the tail end and the velocity of tail trailing edge have been revealed. Moreover, the convection tracks and the Λci of vortex cores for different flexible tails are discussed.

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Authors and Affiliations

  1. Key Laboratory of Fluid Mechanics, Ministry of Education, Beihang University, Beijing, 100191, China

    Ye Hu & JinJun Wang

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  1. Ye Hu
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  2. JinJun Wang
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Correspondence to JinJun Wang.

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Hu, Y., Wang, J. The effects of attached flexible tail length on the flow structure of an oscillating cylinder. Sci. China Phys. Mech. Astron. 56, 340–352 (2013). https://doi.org/10.1007/s11433-013-5014-8

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