Model tests were carried out in a towing tank to investigate the effects of helical grooves on the drag loading of stationary circular cylinders in uniform and steady currents. A series of models were made and tested, including smooth and rough cylinders with and without grooves. The maximum Reynolds number achieved in the tests was about 4×105. The comparative results between the smooth and grooved cylinders show that the helical grooves reduce the drag loading by between 18 and 25% depending upon the cylinder surface roughness and the Reynolds number. This is a continuation of our work published in OMAE06 in Hamburg on VIV suppression by the use of helical grooves.
- Ocean, Offshore and Arctic Engineering Division
Drag Reduction of Deepwater Risers by the Use of Helical Grooves
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Huang, S, Clelland, D, Day, S, & James, R. "Drag Reduction of Deepwater Risers by the Use of Helical Grooves." Proceedings of the ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design. San Diego, California, USA. June 10–15, 2007. pp. 561-565. ASME. https://doi.org/10.1115/OMAE2007-29454
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