中国物理B ›› 2007, Vol. 16 ›› Issue (4): 1077-1083.doi: 10.1088/1009-1963/16/4/036

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Open loop control of vortex-induced vibration of a circular cylinder

陈志华, 范宝春, 周本谋, 李鸿志   

  1. Key Lab of Transient Physics, Nanjing University of Science {& Technology, Nanjing 210094, China
  • 收稿日期:2005-11-24 修回日期:2006-07-23 出版日期:2007-04-20 发布日期:2007-04-20
  • 基金资助:
    Project supported by the Scientific Research and Development Foundation of Nanjing University of Science and Technology, China (Grant No~XKF05070) and Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, Ch

Open loop control of vortex-induced vibration of a circular cylinder

Chen Zhi-Hua(陈志华)†, Fan Bao-Chun(范宝春), Zhou Ben-Mou(周本谋), and Li Hong-Zhi(李鸿志)   

  1. Key Lab of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, China
  • Received:2005-11-24 Revised:2006-07-23 Online:2007-04-20 Published:2007-04-20
  • Supported by:
    Project supported by the Scientific Research and Development Foundation of Nanjing University of Science and Technology, China (Grant No~XKF05070) and Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, Ch

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摘要： In this paper both numerical and experimental investigations have been carried out to suppress the vortex-induced vibration (VIV) of a circular cylinder in an electrically low-conducting fluid. The electromagnetic forces (Lorentz forces) in the azimuthal direction were generated through the mounted electrodes and magnets locally on the surface of the cylinder, which have been proved having an accelerating effect to the fluid on the surface of the cylinder. Results of computations are presented for synchronous vibration phenomenon of a cylinder at Re=200, which are in good agreement with previous computational results. With the Lorentz forces loaded, the VIV of the cylinder has been suppressed successfully. Experimental results have also shown the same tendency and are in reasonable agreement with the numerical results.

关键词: vortex-induced vibration, open-loop control, flow control, Lorentz force

Abstract: In this paper both numerical and experimental investigations have been carried out to suppress the vortex-induced vibration (VIV) of a circular cylinder in an electrically low-conducting fluid. The electromagnetic forces (Lorentz forces) in the azimuthal direction were generated through the mounted electrodes and magnets locally on the surface of the cylinder, which have been proved having an accelerating effect to the fluid on the surface of the cylinder. Results of computations are presented for synchronous vibration phenomenon of a cylinder at Re=200, which are in good agreement with previous computational results. With the Lorentz forces loaded, the VIV of the cylinder has been suppressed successfully. Experimental results have also shown the same tendency and are in reasonable agreement with the numerical results.

Key words: vortex-induced vibration, open-loop control, flow control, Lorentz force

中图分类号:  (Vibrations and mechanical waves)

  • 46.40.-f
47.32.-y (Vortex dynamics; rotating fluids) 47.11.-j (Computational methods in fluid dynamics)