Browse > Article

Numerical Calculation of Flow Pattern and Fluid Force on a Circular Arc-type Sea Anchor  

Ro, Ki-Deok (School of Mechanical and Aerospace EngineeringㆍInstitute of Marine Industry, Gyeongsang National University)
Oh, Se-Kyung (School of Mechanical and Aerospace EngineeringㆍInstitute of Marine Industry, Gyeongsang National University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.28, no.8, 2004 , pp. 1258-1269 More about this Journal
Abstract
The fluid dynamic characteristics of a circular arc type sea anchor were calculated by a discrete vortex method. The flow for the surface of the sea anchor was represented by arranging bound vortices at adequate intervals. The simulations were performed by assuming that the separations occur at edges. With time, the drag coefficient was almost constant but the lift coefficient oscillated in a cycle due to von Karman's vortex street. As the camber ratios increase, the drag coefficient and Strouhal number were almost constant but the oscillating amplitude of the lift coefficient increased largely.
Keywords
Fluid Dynamics; Numerical Analysis; Unsteady Flow; Separation; Vortex Method; Sea Anchor;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Chorin, A. J., 'Numerical Study of Slightly Viscous Flow,' J. of Fluid Mechanics, Vol.57, pp. 785-796, 1982   DOI
2 Kuwahara, K 'Numerical Study of Flow past an Inclined Flat Plate by an Inviscid Model.' J. of the Physical Society of Japan, Vol.35, No.5, pp. 1545-1551., 1973   DOI
3 Ro, K. D., 'Calculation of Thrust and Drag Characteristics for Ship's Propulsion Mechanism of Weis-Fcgh Type,' KSME International Journal. Vol. 14, No. 11, pp, 1257-1266, 2000
4 Ro, K. D. and Tsutahara. M., 'Numerical Analysis of Unsteady Flow in the Weis-Fogh Mechanism by the 3D Discrete Vortex Method with GRAPE3A,' Transactions of the ASME, Journal of Fluids Engineering, Vol. 119, pp. 96-102, 1997   DOI   ScienceOn
5 Tsutahara. M.. Kimura.T. and Ro. K. D., 'Ship's Propulsion Mechanism of Two-Stage 'Weis-Fogh' Type,' Trans. of the ASME, Journal of Fluids Engineering, Vol.116, PP.278-286, 1994
6 Tsutahara. M' Kimura, T. and Ro, K. D., 'Unsteady Pressure and Force in the Discrete Vortex Methods,' Transactions of the Japan Soc. Aero. Space Sci. Vol. 32, No. 97, pp. 129142, 1989
7 Cho, T. H., Drawing of modern Korean fishing gear, National Fisheries Research and Development Institute, Gyeongnam. pp. 89-91. 1989
8 Lee, B. G., Park, S. W., and Kim, J. G., Introduction of fishery in Korean waters, Taehwa printing co., Pusan, pp. 112-116, 1985
9 Sung,' H. T.. Kim, Y. N. and Hyun, J. M., 'Discrete Vortex Simulation of Pulsating Flow Behind a Normal Plate,' Trans. of the ASME, J. of Fluids Engineering, Vol. 116, pp. 862-869, 1994   DOI   ScienceOn
10 Tsutahara. M. .Kimura. T. and Ro, K. D., 'Unsteady Pressure and Force in the Discrete Vortex Methods,' Trans. of the Japan Society for Aeronautical and Space Sciences, Vol. 32, No.97, pp. 129-142, 1989
11 Ro, K. D., 'Development of the Weis-Fogh Type Ship Propulsion Mechanism (Visualization and Numerical Analysis of the Flow Field).' Transactions of the KSME, Vol. 17. No.2, pp. 426-437 in Korean. 1993
12 Inamuro, T. Saito, T. and Adachi, T., 'A Numerical Analysis of Unsteady Separated Flow by the Discrete Vortex Method Combined with the Singularity Method,' Computer & Structure, Vol.19, No.1-2, pp. 75-84, 1984   DOI   ScienceOn
13 Sarpkaya, T., 'An Analytical Study of Separated Flow about Circular Cylinders,' Trans. of the ASME, J. of Basic Engineering, Vol.90, pp. 511-518, 1986
14 Ogami, Y. and Akamatsu, T., 'Viscous Flow Simulation Using the Discrete Vortex Method - The Diffusion Velocity Method,' Computers and Fluids, Vol.19, Pt.3, pp. 433-441. 1991
15 Ogami, Y., 'Simulation of Natural Convecti-on by the Vortex Method for Heat Transfer,' Japan Soc. of CFD, 11th Symposium paper, pp. 373-374, 1997
16 Nomura, M., Mori , K, Tawara. Y. and Osawa. Y., 'Hydraulic Resistance of Current Parachute,' Bull. Tokai Reg. Fish. Res. Lab., No. 52, pp. 49-74, 1967