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http://dx.doi.org/10.5407/JKSV.2011.9.1.020

PIV Investigation on the Skin Friction Reduction Mechanism of Outer-layer Vertical Blades  

Park, Hyun (부산대학교 첨단조선공학연구센터)
An, Nam-Hyun (거제대학 조선과)
Park, Seong-Hyoen (부산대학교 조선해양공학과 대학원)
Chun, Ho-Hwan (부산대학교 첨단조선공학연구센터)
Lee, In-Won (부산대학교 첨단조선공학연구센터)
Publication Information
Journal of the Korean Society of Visualization / v.9, no.1, 2011 , pp. 20-28 More about this Journal
Abstract
An experimental assessment has been made of the drag reducing efficiency of the outer-layer vertical blades, which were first devised by Hutchins. The drag reduction efficiency of the blades was reported to reach as much as 30%. However, the drag reduction efficiency was quantified only in terms of the reduction in the local skin-friction coefficient. In the present study, a series of drag force measurements in towing tank has been performed toward the assessments of the total drag reduction efficiency of the outer-layer vertical blades. A maximum 9.6% of reduction of total drag was achieved. The scale of blade geometry is found to be weakly correlated with outer variable of boundary layer. In addition, detailed flow field measurements have been performed using 2-D time resolved PIV with a view to enabling the identification of drag reduction mechanism.
Keywords
drag reduction; outer-layer vertical blades; turbulent flow control; time-resolved PIV; energy efficient ship;
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  • Reference
1 Hutchins, N., 2003, An investigation of larger-scale coherent structures in fully developed turbulent boundary layers, Ph.D. Thesis, University of Nottingham.
2 Corbett, J. J. and Koehler, H. W., 2003, “Updated emissions from ocean shipping,” J. Geophysical Research, vol. 108, no. D20, pp. ACH 9-1- 9.13.
3 Walsh, M., 1980, “Drag characteristics of V-groove and transverse curvature riblets, In: Viscous Flow Drag Reduction (ed. G. R. Hough),” Progress in Astronautics and Aeronautics, Vol. 72. AIAA.
4 Beckert, D. W. and Bartenwerfer, M., 1989, “The viscous flow on surfaces with longitudinal ribs,” J. Fluid Mechanics, Vol. 206, pp.105-129.   DOI
5 Choi, K. S., Yang, X., Clayton, B. R., Glover, E. J., Atlar, M., Semenov, B. N. and Kulik, V. M., 1997, “Turbulent drag reduction using compliant surfaces,” Proc. Royal Soc. London ser. A, Vol.453, pp. 2229-2240.   DOI   ScienceOn
6 Hefner, J. N., Weinstein, L. M. and Bushnell, D. M., 1979, “Large-Eddy Breakup Scheme for Turbulent Viscous Drag Reduction,” Paper of the Symposium on Viscous Drag Reduction, Nov. 7-8.
7 Schlichting, H. and Gersten, K., 2000, “Boundary Layer Theory,” 8th Ed., Springer-Verlag, Berlin, p. 34.
8 White, F. M., 1991, “Viscous Fluid Flow,” 2nd Ed., McGraw Hill, p. 432.
9 Schultz, M. P., 2004, “Frictional Resistance of Antifouling Coating System,” Trans. ASME J. Fluid Eng., Vol. 126, pp. 1039-1046.   DOI   ScienceOn
10 Adrian, R. J., Meinhart, C. D. and Tomkins, C. D., 2000, “Vortex organization in the turbulent boundary layer,” J. Fluid Mech., Vol. 422, pp.1-54.   DOI   ScienceOn