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Effects of an upstream inclined rod on the circular cylinder–flat plate junction flow

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Abstract

An inclined rod is installed upstream of a circular cylinder mounted on a flat plate to mitigate the horseshoe vortices in the junction flow. Smoke-wire visualization, hot-wire velocity measurement and surface pressure measurement are employed to study the effects of the inclined rod on the laminar and turbulent junction flows. The results show a properly placed inclined rod can significantly weaken the horseshoe vortices in front of the cylinder, depress the unsteady oscillation of the vortex system, change the separation position on the flat plate and narrow the wake of the cylinder. The inclined rod method provides a promising way to suppress the horseshoe vortices in the junction flow because of its effectiveness and its easiness to implement and adjust to fit different flow conditions.

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Acknowledgments

We would like to thank Mr. Wang Y.L. from the State Key Laboratory of Turbulence and Complex Systems of Peking University for his help in the experiment.

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Authors and Affiliations

  1. State Key Laboratory of Turbulence and Complex Systems, College of Engineering, Peking University, 100871, Beijing, People’s Republic of China

    J. M. Wang & Q. D. Wei

  2. The Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education of China, Beijing University of Technology, 100022, Beijing, People’s Republic of China

    W. T. Bi

  3. The Key Laboratory of Heat Transfer and Energy Conversion, Beijing Education Commission, College of Environmental and Energy Engineering, Beijing University of Technology, 100022, Beijing, People’s Republic of China

    W. T. Bi

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  1. J. M. Wang
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  2. W. T. Bi
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  3. Q. D. Wei
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Correspondence to Q. D. Wei.

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Wang, J.M., Bi, W.T. & Wei, Q.D. Effects of an upstream inclined rod on the circular cylinder–flat plate junction flow. Exp Fluids 46, 1093–1104 (2009). https://doi.org/10.1007/s00348-009-0619-4

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  • DOI: https://doi.org/10.1007/s00348-009-0619-4

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