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Experimental and numerical study on vortical flow behind 3D hydrofoils

Authors
Kim, J.-H.Jeong, S.-W.Ahn, B.-K.Kim, G.-D.Lee, C.-S.
Issue Date
2016
Publisher
DTU Mechanical Engineering, Technical University of Denmark
Keywords
B-Spline; Cavitation tunnel; Higher-order panel method; Tip vortex cavitation(TVC); Vortical flow; Wake roll-up
Citation
PRADS 2016 - Proceedings of the 13th International Symposium on PRActical Design of Ships and Other Floating Structures
Journal Title
PRADS 2016 - Proceedings of the 13th International Symposium on PRActical Design of Ships and Other Floating Structures
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8556
ISSN
0000-0000
Abstract
We fundamentally study on vortical flow behind the three-dimensional circular wing. For more improved hydrodynamic analysis, we employ a B-Spline-based higher-order panel method including a nonlinear wake roll-up mechanism. Using the present numerical method, we can well-predict the contraction and position of vortex cores just with the longitudinal trailing wake shapes. Numerical results are compared with the experiments from a cavitation tunnel in Chungnam National University (CNUCT). Observations of the vortical flow behind the circular wing and inception dynamics of tip vortex cavitation are obtained using high speed cameras and SIV(Shadow Image Velocimetry). In addition, we measure pressure fluctuations above the circular wing which are closely related with vortical flow noise.
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Kim, Gun Do
지능형선박연구본부 (함정공학연구센터)
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