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- Title
Suppression system for offshore cylinders under vortex induced vibration.
- Authors
Srinivasan, Chandrasekaran; Thomas, Merin
- Abstract
Vortex Induced Vibration (VIV) is a major challenge in the design of tubular members under second order wave effects. Providing helical strakes have proven to eliminate presence of VIV, but at the cost of increased drag. Two different approaches of VIV suppression are discussed in the present study and compared. Concept of suppressing vibration by tripping the boundary layer of incoming flow using stripping wires is experimentally investigated. It is seen that the position at which boundary separates has an important role in response behavior of the cylinder. Effect of lock-in point at higher reduced velocities is quantified. Alternative study is also carried out by disrupting the correlation of flow in a stepped cylinder where an abrupt change in diameter in imposed by design. For comparison, vibration of stepped cylinder, attached with tripping wire is also examined. Results from the studies showed VIV suppression under both the independent configurations but a significant improvement is seen in the latter case.
- Subjects
VIBRATION (Mechanics); VORTEX methods; ENGINE cylinder aerodynamics; BOUNDARY layer (Aerodynamics); WIRE; EQUIPMENT &; supplies
- Publication
Vibroengineering Procedia, 2016, Vol 7, p1
- ISSN
2345-0533
- Publication type
Article