漩涡诱导圆柱体振动:降低拖曳阻力和运动幅度的实验研究
Reducing the deleterious effect of Vortex Induced Vibrations (VIV) in marine risers is animportant task for ocean engineers and many competing factors exist in the design ofVIV suppression devices. This thesis explores the experimental minimization of the dragforce and the disruption of v0l1ex formation by utilizing VIV suppression devices.Two series of tests are conducted-both utilizing separate testing designs. The first testsare the flexible cylinder experiments, detailed in Chapter 2, which determine the dragforce and vibration amplitude of numerous, original testing configurations. The secondseries of tests are the rigid cylinder, PIV experiments, detailed in Chapter 3. These testsmeasure both the drag force on the cylinder and the oscillating component of the liftforce, the latter of which is a good indication of v011ex formation. The Chapter 3 testsalso image the test section wake-providing helpful insight into the physical process ofvortex formation.In brief, this thesis presents a detailed description and results of the two series of originalVIV suppression tests. Many original configurations are tested, and the results arecontained herein.