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Numerical Study of Porous Treatments on Controlling Flow around a Circular Cylinder

Author

Listed:
  • Chen Xu

    (School of Naval Architecture, Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Shihao Wang

    (School of Naval Architecture, Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China)

  • Yijun Mao

    (School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

Abstract

Porous materials fixed on and downstream the cylinder can reach a much better effect in suppressing wall pressure fluctuations. In the present paper, numerical comparative studies have been conducted to investigate passive control of flow past a cylinder surface, in which three schemes with different porous treatments are applied to compare their pros and cons. The results show all of the three schemes of porous materials increase the time-averaged flow drag and reduce fluctuations of lift and drag forces. It can be concluded the velocity gradient reduction inside the boundary layer and the vortex shedding delay through porous coating, as well as reverse transition from turbulent vortex shedding into laminar through porous treatment downstream the cylinder, are main flow control mechanisms of porous materials. These mechanisms all reduce fluctuations of lift and drag fluctuations, but have a distinct effect on the features of wake evolution, such as the wake width and length as well as the fluctuating components of the flow velocity. In addition, the wake evolution is highly affected by the location of porous materials.

Suggested Citation

  • Chen Xu & Shihao Wang & Yijun Mao, 2022. "Numerical Study of Porous Treatments on Controlling Flow around a Circular Cylinder," Energies, MDPI, vol. 15(6), pages 1-20, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:6:p:1981-:d:766838
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    Cited by:

    1. Sheng Yin & Jimin Ni & Houchuan Fan & Xiuyong Shi & Rong Huang, 2022. "A Study of Evaluation Method for Turbocharger Turbine Based on Joint Operation Curve," Sustainability, MDPI, vol. 14(16), pages 1-18, August.

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