This work is experimental studies of the turbulent vortex structures in the wake of a fixed cylinder with helical strakes. The effect and mechanism of a triple helical strake system on suppression of vortex induced vibrations (VIV) are investigated experimentally in a water tunnel. Strakes with a length of 25D in pitch and 0.1D & 0.2D in height are fitted onto a rigid cylinder of diameter D = 12mm, and subjected to a transverse water flow. PIV techniques are used to measure the vector field to identify the vortex structures. The hot-film techniques are also employed to identify the shedding frequency. Measurements for the bare cylinders are also conducted for comparison. The mechanism of the VIV reduction by helical strakes is discussed in detail.
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ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
June 6–11, 2010
Shanghai, China
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4914-9
PROCEEDINGS PAPER
Experimental Studies of Vortex Structures in the Wake of a Cylinder With Helical Strakes
Z. Hao,
Z. Hao
Shanghai Maritime University, Shanghai, China
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T. Zhou,
T. Zhou
The University of Western Australia, Perth, WA, Australia
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X. Wang,
X. Wang
Nanyang Technological University, Singapore
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S. K. Tan
S. K. Tan
Nanyang Technological University, Singapore
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Z. Hao
Shanghai Maritime University, Shanghai, China
T. Zhou
The University of Western Australia, Perth, WA, Australia
X. Wang
Nanyang Technological University, Singapore
S. K. Tan
Nanyang Technological University, Singapore
Paper No:
OMAE2010-20181, pp. 473-477; 5 pages
Published Online:
December 22, 2010
Citation
Hao, Z, Zhou, T, Wang, X, & Tan, SK. "Experimental Studies of Vortex Structures in the Wake of a Cylinder With Helical Strakes." Proceedings of the ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6. Shanghai, China. June 6–11, 2010. pp. 473-477. ASME. https://doi.org/10.1115/OMAE2010-20181
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