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Wake structure of a finite circular cylinder of small aspect ratio

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Abstract

The wake of a finite circular cylinder of small aspect ratio was studied with a seven-hole probe and thermal anemometry. The cylinder was mounted normal to a ground plane and was partially immersed in a turbulent boundary layer. The time-averaged velocity and streamwise vorticity fields showed the development of the tip vortex structures, the extent of the near-wake recirculation zone, the downwash phenomenon and base vortex structures within the boundary layer. The wake structure and power spectra were similar for cylinder aspect ratios of 5 to 9, but a distinctly different behaviour was observed for an aspect ratio of 3.

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Acknowledgments

The authors acknowledge the support of the Natural Sciences and Engineering Research Council (NSERC) of Canada, the Canada Foundation for Innovation (CFI), the Innovation and Science Fund of Saskatchewan, the College of Graduate Studies and Research, the Department of Mechanical Engineering and Saskatchewan’s Centennial Student Employment Program. The assistance of D. Deutscher, M. S. Adaramola and Engineering Shops is appreciated.

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  1. Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan, S7 N 5A9, Canada

    D. Sumner, J. L. Heseltine & O. J. P. Dansereau

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  1. D. Sumner
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  2. J. L. Heseltine
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  3. O. J. P. Dansereau
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Correspondence to D. Sumner.

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Sumner, D., Heseltine, J.L. & Dansereau, O.J.P. Wake structure of a finite circular cylinder of small aspect ratio. Exp Fluids 37, 720–730 (2004). https://doi.org/10.1007/s00348-004-0862-7

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