Hydrodynamic response of a passive shape-adaptive composite hydrofoil |
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| Institution: | 1. School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia;2. Maritime Division, Defence Science and Technology Group (DST), 506 Lorimer Street, Fishermans Bend VIC, 3207, Australia;3. Australian Maritime College, University of Tasmania, Newnham, TAS, 7248, Australia;1. College of Engineering, Ocean University of China, Qingdao, 266100, PR China;2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China;3. Liaoning Engineering Laboratory for Deep-Sea Floating Structure, School of Naval Architecture, Dalian University of Technology, Dalian, 116024, PR China;1. Centre Internacional de Mètodes Numèrics a l’Enginyeria (CIMNE), Edifici C1, Campus Norte, UPC, Gran Capitán s/n, Barcelona, 08034, Spain;2. Universidad Politécnica de Cataluña (UPC), C. Gran Capitan s/n, Campus Nord, Barcelona, 08034, Spain;3. Compass Ingeniería y SItemas, C. Gran Capitan s/n, Campus Nord, Barcelona, 08034, Spain;1. Department of Computational Mechanics – DMC, University of Campinas, R. Mendeleyev 200, CEP 13.083-860, Campinas, Brazil;2. Department of Mechanical Engineering, University of Bristol, Queen''s Building, University Walk, Bristol, BS8 1TR, United Kingdom;3. Department of Civil Engineering, University of Bristol, Queen''s Building, University Walk, Bristol, BS8 1TR, United Kingdom;4. Subsea Equipment Technology, Research Centre, Petrobras, Rua Horácio Macedo 950, CEP 21.941-590, Rio de Janeiro, Brazil;1. Graduate School of Engineering Science, Yokohama National University, 240-8501, Kanagawa, Japan;2. Design Department, Onomichi Dockyard Co., Ltd., Hiroshima, Japan;3. Faculty of Engineering, Yokohama National University, 240-8501, Kanagawa, Japan;4. Hull Rules Development Dept., ClassNK, Tokyo, Japan;1. Department of Naval Architecture and Ocean Engineering, Seoul National University, 599 Gwanak-Ro, Gwanak-Gu, Seoul, 151-744, Republic of Korea |
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| Abstract: | The primary objective of this paper is to present cavitation tunnel tests performed on an optimised shape-adaptive composite hydrofoil and compare the results to other composite hydrofoils. The optimised composite hydrofoil was designed based on prior literature and was manufactured using an optimised ply orientation schedule and a pre-twist. In the same experiment schedule a composite hydrofoil that has a ply orientation that is opposite to the optimised hydrofoil was also tested. In addition to the cavitation tunnel experiments, the paper also presents results predicted from FEA and CFD simulations for the optimised hydrofoil and compares the results from numerical methods to experiments. The results show that the optimised hydrofoil has an improved L/D ratio and a delayed stall phenomenon compared to other hydrofoils. Furthermore, due to the pre-twisted optimised geometry, the hydrofoil does not suffer from loss of lift at low angles of attack. The experimental results demonstrated the importance of characterising the performance of flexible shape-adaptive hydrofoils based on the actual velocity of the flow in addition to the conventional characterisation based on Reynold's number. Additional numerical simulations were performed to investigate the hydrofoils observed load dependant deformation behaviour. These results clearly show that for the same Reynold's number, the hydrofoil can have an appreciably different response if the flow velocity is different. |
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| Keywords: | Shape-adaptive Cavitation tunnel Composite hydrofoil Layup optimisation |
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