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Vortex flow patterns of a heaving foil

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Abstract

It is known that an oscillating foil can produce a thrust force through the generation of a reverse Kármán vortex street and this can be expected to be a new highly effective propulsion system. A heaving foil model was made and it was operated within a circulating water channel. The wake formation behind the heaving foil was visualized using PIV method and a dynamic thrust force was measured using a mini 6-axis force sensor based on force and moment detectors. We examined various conditions such as reduced frequency and amplitude in NACA 0010 profile. The vortical patterns in the wake were classified according to the wake mode and force data.

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Correspondence to Yang C. J..

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Chang-Jo Yang: He received his B. Eng. and M. Eng. degrees in marine systems engineering from Korea Maritime University in 1993 and 1999. He also received his Dr. Eng. degree in 2003 from Kyushu Institute of Technology. He is now working on optimal thrust development in oscillating hydrofoils using active vorticity control at Korea Maritime University. His research interests are also measurement technique of particle sizing in spay flow and In vivo PIV measurement of capillary blood flow.

Young-Ho Lee: He graduated from Department of Marine Engineering, Korea Maritime University (KMU) in 1980. He acquired his master degree of Marine Engineering from KMU in 1982. He received his Ph.D. degree of Mechanical Engineering from University of Tokyo in 1992. He has been working in Division of Mechanical and Information Engineering, KMU as a faculty member since 1980. His research interests are quantitative flow informatics by PIV (time-resolved 2-D, surface flow, volume 3-D, stereoscopic 3-D, web visualization and animation contents) and Computational Fluid Dynamics (CFD). Main applications are turbo-machinery and renewable energy sources such as wind turbine and micro-hydro turbine.

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Yang, C.J., Lee, Y.H. Vortex flow patterns of a heaving foil. J Vis 9, 13–21 (2006). https://doi.org/10.1007/BF03181564

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  • DOI: https://doi.org/10.1007/BF03181564

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