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RESEARCH PAPERS: Offshore Mechanics and Arctic Engineering

Added Mass and In-Line Steady Drag Coefficient of Multiple Risers

[+] Author and Article Information
T. Overvik, G. Moe

Division of Port and Ocean Engineering, The Norwegian Institute of Technology, Trondheim, Norway

J. Energy Resour. Technol 107(1), 2-11 (Mar 01, 1985) (10 pages) doi:10.1115/1.3231159 History: Received August 04, 1983; Revised July 11, 1984; Online October 22, 2009

Abstract

Part of the results of an investigation with multiple rise configuration exposed to steady currents are presented. These tests were performed on smooth sectional riser models in a water flume at Reynolds numbers in the range 0.5 × 104 to 0.5 × 105 . Reynolds number is based upon the diameter of the central cylinder (DC ). Both the added mass, the frequency of vibration and the in-line steady drag coefficient are discussed both for vibration in the lock-in range and in the galloping mode.

Copyright © 1985 by ASME
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