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Keywords: upstream cylinder
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Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-22951-MS
.... The general case of interference of arrays of risers is simplified in practiceby using strip theory and considering the two closest risers at any given time. Also the time-average hydrodynamic excitation forces are considered. upstream cylinder riser upstream oil & gas coefficient otc 22951...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18529-MS
... Abstract Experiments and analyses have been made to determine the response of a downstream cylinder that is in the wake of a fixed upstream cylinder. This geometry is of great practical importance for risers in deepwater. It arises with jumpers in deepwater hybrid riser towers and in closely...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2005
Paper Number: OTC-17290-MS
... or separation distances. While the cylinders experienced transverse VIV in only the first mode, the test Reynolds numbers were well into the transition range, and the drag crisis was clearly observed on the upstream cylinder. Both acceleration and drag were measured to provide some interesting correlations...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2003
Paper Number: OTC-15285-MS
... at the center of the basin. A maximum arm speed of 30 knots can be achieved in 1/2 of a revolution at a radius of 120 ft and speeds up to 50 knots can be achieved at this radius in two revolutions. otc 15285 upstream cylinder acceleration reduction factor cylinder coefficient pipe offshore...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7237-MS
... upstream oil & gas diameter pretension collision consideration drag coefficient current force upstream riser interaction transverse force riser procedure technology conference cylinder calculation procedure otc 7237 individual riser riser array upstream cylinder inflow...

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