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Wave Induced Hydrodynamic Forces on Vertical Piggyback Risers

[+] Author Affiliations
Robert Olsen, Shan Huang

Universities of Glasgow and Strathclyde, Glasgow, UK

Paper No. OMAE2002-28043, pp. 25-31; 7 pages
doi:10.1115/OMAE2002-28043
From:
  • ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
  • 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 1
  • Oslo, Norway, June 23–28, 2002
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3611-8 | eISBN: 0-7918-3599-5
  • Copyright © 2002 by ASME

abstract

The wave induced hydrodynamic forces on a pair of vertical cylinders of different diameters in close proximity are investigated experimentally. The smaller cylinder is placed at various positions around the larger one. The wave forces, including both drag and lift, are measured on each cylinder independently at two different depths below the mean water level for each cylinder. The Keulegan-Carpenter numbers vary from 0.4 to 14 based upon the larger cylinder diameter and the Reynolds numbers are in the sub-critical regime. It is found that there is significant interference effect upon the cylinder drag and inertia coefficients.

Copyright © 2002 by ASME

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