Experimental investigation on hydrodynamics of floating cylinder in oscillatory and steady flows by forced oscillation test |
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| Institution: | 1. Maritime Institute, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;2. School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore;3. Department of Ocean and Resources Engineering, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI 96822-2303, USA;4. Deepwater Technology Research Centre, Bureau Veritas Marine Singapore, 20 Science Park Road #03-01, Teletech Park, Singapore Science Park II, 117674, Singapore;5. Singapore Innovation and Research Centre, American Bureau of Shipping, 438 Alexandra Road #10-00, Alexandra Point, 119958, Singapore;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. Collaborative Innovation Centre for Advanced Ship and Deep-Sea Exploration, Shanghai, 200240, China;3. Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China;1. Department of Engineering Mechanics, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, China;2. Key Laboratory of Hydrodynamics (Ministry of Education), Shanghai Jiao Tong University, China |
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| Abstract: | In this paper the hydrodynamic characteristics of a floating cylinder are investigated via forced oscillation experiments in towing tank. The effects of Keulegan–Carpenter number, Reynolds number, reduced velocity and overtopping on hydrodynamics of the floating cylinder in oscillatory and steady flow are studied. The results show a considerably difference of the hydrodynamic characters between the floating and the fully immerged cylinders due to the influences of free surface. The growth of the reduced velocity, a proven notable effect on hydrodynamics, will lead to the increase of added mass coefficient and the decrease of drag coefficient. Meanwhile the overtopping, a particular phenomenon for the floating cylinder, render the added mass coefficients reach up to 3.6 while for the drag coefficient small influences were made. |
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| Keywords: | Fish farming Floating collar Hydrodynamics Experiments Oscillatory current |
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