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Aerodynamic characteristics of a square cylinder with a rod in a staggered arrangement

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Abstract

The aerodynamic characteristics of a square cylinder with an upstream rod in a staggered arrangement were examined. The pressure measurement was conducted in a wind tunnel at a Reynolds number of Re D =82,000 (based on the width of the square cylinder) and the flow visualization was carried out in a water tunnel with the hydrogen bubble technique at Re D =5,200. When the rod and the square cylinder were in tandem, the reduction of drag was mainly caused by the increase of the rear suction pressure. When the staggered angle was introduced, the shield and disturbance effect of the rod on the square cylinder diminished, which results in the increase of the cylinder drag. The side force induced by the staggered angle is small (the maximum value is 20% of the drag of the isolate square cylinder). There were six different flow modes with various staggered angles and spacing ratios, and the corresponding flow patterns are presented in present paper.

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Acknowledgements

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China for this work through grant NSFC 10272016.

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Authors and Affiliations

  1. Institute of Fluid Mechanics, Beijing University of Aeronautics and Astronautics, Beijing, 100083, China

    P. F. Zhang, J. J. Wang & S. F. Lu

  2. School of Mechanical Engineering, University of Adelaide, Adelaide, SA, 5005, Australia

    J. Mi

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  1. P. F. Zhang
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  2. J. J. Wang
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  3. S. F. Lu
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Correspondence to J. J. Wang.

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Zhang, P.F., Wang, J.J., Lu, S.F. et al. Aerodynamic characteristics of a square cylinder with a rod in a staggered arrangement. Exp Fluids 38, 494–502 (2005). https://doi.org/10.1007/s00348-005-0936-1

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  • DOI: https://doi.org/10.1007/s00348-005-0936-1

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