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| Experimental investigation of a new device in suppressing vortex-induced vibrations of a circular cylinder | |
Lin LM(林黎明) ; Zhong XF(钟兴福); Wu YX(吴应湘); Lin LM(林黎明)
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| Source Publication | PROCEEDINGS OF THE 21ST (2011) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, ISOPE-2011 |
| 2011 | |
| Pages | 1283-1288 |
| Conference Name | 21st International Offshore and Polar Engineering Conference, ISOPE-2011 |
| Conference Date | JUN 19-24, 2011 |
| Conference Place | Maui, HI, United states |
| Abstract | In suppressing vortex-induced vibration (VIV) of flexible risers in deep sea, a new device based on the Bernoulli equation and effects of geometric disturbance on flows around a bluff body is proposed. The mechanism is the disturbance in a radial-spanwise plane on fluid flows around the body and spanwise uniformity of vortex shedding. In present experiments, two types of disturbance, harmony and cone-like, and different waviness (ratio of wave height to wavelength) of 0.025, 0.05 and 0.1 are investigated. Experimental results have shown that oscillating amplitudes with such disturbance are reduced at mild and high waviness at occurrence of synchronization of a circular cylinder without disturbance. Reduction of RMS values reach up to 48.5% for harmonic disturbance and 53% for cone-like disturbance at the waviness of 0.1. |
| Keyword | Circular Cylinders Experiments Instrument Scales Marine Risers Vibrations (Mechanical) Vortex Flow Vortex Shedding Passive Control Riser Suppression Vortex Induced Vibration Wavy Disturbance |
| Department | LMFS多相流及流固耦合(LHO) |
| ISBN | 978-1-880653-96-8 |
| Indexed By | EI |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46847 |
| Collection | 水动力学与海洋工程重点实验室(2009-2011) |
| Corresponding Author | Lin LM(林黎明) |
| Recommended Citation GB/T 7714 | Lin LM,Zhong XF,Wu YX,et al. Experimental investigation of a new device in suppressing vortex-induced vibrations of a circular cylinder[C]PROCEEDINGS OF THE 21ST (2011) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, ISOPE-2011,2011:1283-1288. |
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