Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Simulation of Slamming Phenomena for 2-D Wedges

2차원 쐐기형 구조물의 슬래밍 현상에 대한 수치 유동해석

  • Yum, Deuk-Joon (Dept. of Naval Architecture, Kunsan National University) ;
  • Yoon, Bum-Sang (School of Naval Architecture and Ocean Engineering, University of Ulsan)
  • Published : 2008.10.31
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Abstract

Numerical analysis for slamming impact phenomena has been carried out when 2-dimensional wedge shaped structure with finite deadrise angles enter the free surface by using a commertial CFD code, FLUENT. Fluid is assumed incompressible and entry speed of the structure is kept constant. Geo-reconstruct scheme (or PLIC-VOF scheme) is used for the tracking of the deforming free surface. User defined function of 6 degrees of freedom motion and moving dynamic mesh option are used for the expression of the downward motion of the structure and deforming of unstructured meshes adjacent to the structure. The magnitude and the location of impact pressure and the total drag force which is the summation of pressures distributed at the bottom of the structure are analyzed. Results of the analysis show good agreement with the results of similarity solution, asymptotic solution and the solution of BEM.

Keywords

References

  1. Armand, J.L. and Cointe, R., 1986, "Hydrodynamic Impact Analysis of a Cylinder," Proc. of 5th OMAE Symp., Tokyo, Japan, Vol. 1, pp. 609-634
  2. Chuang, S.L., 1966, "Experimental on Flat-bottom Slamming," Journal of Ship Research, Vol. 10, No. 1, pp. 10-17
  3. Chuang, S.L., 1967, "Experimental on Slamming of Wedge-shaped Bodies," Journal of Ship Research, Vol. 11, No. 3, pp. 190-198
  4. Chung, J.Y., Nahm, J.O., Kang, H.D. and Kwon, S.H., 2007, "A Novel Experimental Technique in Slamming," Proc. 22nd Int. Workshop on Water Waves and Floating Bodies, Croatia, pp. 41-44
  5. Dobrovol'skaya, Z.N., 1969, "On Some Problems of Similarity Flow of Fluid with a Free Surface," Journal of Fluid Mechanics, Vol. 36, part 4, pp. 805-829 https://doi.org/10.1017/S0022112069001996
  6. Faltinsen, O and Chezhian, M., 2005, "A Generalized Wagner Method for Three-dimensional slamming," Journal of Ship Research, Vol. 49, No. 4, pp. 279-287
  7. Faltinsen, O. and Zhao, R., 1997, "Water Entry of Ship Sections and Axisymmetric Bodies," Proc., Advisory Group for Aerospace Research and Development(NATO), High Speed Body Motion in Water, Sept., Kiev, Ukraine
  8. FLUENT 2006, Ver.6.3.26 User Manual
  9. Hirt, C.W. and Nichols, B.D., 1981, "Volume of Fluid(VOF) Method for Dynamics of Free Boundaries," Journal of Computational Physics, Vol. 39, pp. 201-225 https://doi.org/10.1016/0021-9991(81)90145-5
  10. Howison, S.D., Ockendon, J.R. and Wilson, S.K., 1991, "Incompressible Water-entry Problems at Small Deadrise Angles," Journal of Fluid Mechanics, Vol. 222, pp. 215-230 https://doi.org/10.1017/S0022112091001076
  11. Lee, B.Y., Park, J.C., Jung, S.J., Ryu, M.C. and Kim, Y.S., 2008, "Numerical Simulation for Fluid Impact Loads by Flat Plate with Incident Angles," Journal of the Society of Naval Architects of Korea, Vol. 45, No. 1, pp. 1-9 https://doi.org/10.3744/SNAK.2008.45.1.1
  12. Lee, H.S., Kwon, S.H., Song, K.J., Jung, B.H. and Kim, Y.B., 2005, "An Experimental and Numerical Study on Slamming Impact," Proc. of Annual Autumn Meeting, Society of Naval Architects of Korea, Yongin, pp. 1080-1084
  13. von Karman, T., 1929, "The Impact of Seaplane Floats during Landing," N.A.C.A. TN321, Washington
  14. Wagner, V.H., 1932, "Uber Stoss und Gleitvergänge an der Oberfläche von Flussigkeiten," Aeitschrift fur Angewandle Mathematik und Mechanik, Vol. 12, pp. 193-215 https://doi.org/10.1002/zamm.19320120402
  15. Yang, S.H., Lee, H.H., Park, T.H., Lee, I.H and Lee, Y.W., 2007, "Experimental and Numerical Study on the Water Entry of Symmetric Wedges and a Stern Section of Modern Containership," Proc. of Practical Design of Ships and Offshore Structures Symp
  16. Yoon, B.S., 1991, "Lagrangian Finite Element Analysis of Water Impact Problem," Journal of the Society of Naval Architects of Korea, Vol. 28, No. 1, pp. 60-68
  17. Youngs, D.L., 1982, "Time-dependent multi-material Flow with Large Fluid Distortion," Numerical Methods for Fluid Dynamics, Academic Press
  18. Zhao, R. and Faltinsen, O., 1993, "Water Entry of Two-dimensional Bodies," Journal of Fluid Mechanics, vol. 246, pp. 593-612 https://doi.org/10.1017/S002211209300028X
  19. Zhao, R., Faltinsen, O. and Aarsnes, J., 1996, "Water Entry of Arbitrary Two-dimensional Sections with and without Flow Separation," Proc. of 21st Symp. on Naval Hydrodynamics, Trondheim, Norway, National Academy Press, Washington, D.C

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