Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Reduction of UKC for Very Large Tanker and Container Ship in Shallow Water

  • Lee, Sang-Min (Division of Marine Industry Transportation Science and Technology, Kunsan National University)
  • Received : 2021.05.06
  • Accepted : 2021.05.28
  • Published : 2021.05.31
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Abstract

The decrease in under keel clearance (UKC) due to the increase of draft that occurs during advancing and turning of very large vessels of different types was analyzed based on computational fluid dynamics (CFD). The trim change in the Duisburg test case (DTC) container ship was much smaller than that of the KRISO very large crude oil carrier 2 (KVLCC2). The sinkage of both ships increased gradually as the water depth became shallower. The amount of sinkage change in DTC was greater than that in KVLCC2. The maximum heel angle was much larger for DTC than for KVLCC2. Both ships showed outward heel angles up to medium-deep water. However, when the water depth became shallow, an inward heel was generated by the shallow water effect. The inward heel increased rapidly in very shallow water. For DTC, the reduction ratio was very large at very shallow water. DTC appeared to be larger than KVLCC2 in terms of the decreased UKC because of shallow water in advancing and turning. In this study, a new result was derived showing that a ship turning in a steady state due to the influence of shallow water can incline inward, which is the turning direction.

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References

  1. Alderf, N., E. Lefrancois, P. Sergent, and P. Debaillon(2011), Dynamic ship response integration for numerical prediction of squat in highly restricted waterways, International Journal for Numerical Methods in Fluids, Vol. 65, pp. 743-763. https://doi.org/10.1002/fld.2194
  2. Barrass, C. B. and D. R. Derrett(2006), Ship stability for masters and mates, 6th ed.; Butterworth-Heinemann: Oxford, UK, 2006.
  3. Bechthold, J. and M. Kastens(2020), Robustness and quality of squat predictions in extreme shallow water conditions based on RANS-calculations, Ocean Engineering, Vol. 197, 106780. https://doi.org/10.1016/j.oceaneng.2019.106780
  4. Celik, I. B., U. Ghia, P. J. Roache, C. J. Freitas, H. Coleman, and P. E. Raad(2008), Procedure for estimation and reporting of uncertainty due to discretization in CFD applications. Journal of Fluids Engineering, Vol. 130, 078001-1-078001-4. https://doi.org/10.1115/1.2960953
  5. Demirel, Y. K., O. Turan, and A. Incecik(2017), Predicting the effect of biofouling on ship resistance using CFD. Applied Ocean Research, Vol. 62, pp. 100-118. https://doi.org/10.1016/j.apor.2016.12.003
  6. Deng, G., E. Guilmineau, A. Leroyer, P. Queutey, M. Visonneau, and J. Wackers(2014), Simulation of container ship in shallow water at model scale and full scale. In Proceedings of the Third Chinese National CFD Symposium on Ship and Offshore Engineering, Dalian, China, 25 July 2014.
  7. Ferziger, J. H. and M. Peric(2002), Computational Methods for Fluid Dynamics, 3rd ed.; Springer: Berlin, Germany, 2002.
  8. Gourlay, T.(2008), Slender-body methods for predicting ship squat, Ocean Engineering, Vol. 35, pp. 191-200. https://doi.org/10.1016/j.oceaneng.2007.09.001
  9. Kijima, K., R. Tanaka, Y. Furukawa, and T. Kaneko(2002), Simple prediction method on squat, Transactions of the West-Japan Society of Naval Architects, No. 103, pp. 101-110.
  10. Lataire, E., M. Vantorre, and G. Delefortrie(2012), A prediction method for squat in restricted and unrestricted rectangular fairway, Ocean Engineering, Vol. 55, pp. 71-80. https://doi.org/10.1016/j.oceaneng.2012.07.009
  11. Lee, S. M. and C. B. Hong(2017), Study on the course stability of very large vessels in shallow water using CFD, Ocean Engineering, Vol. 145, pp. 395-405. https://doi.org/10.1016/j.oceaneng.2017.09.064
  12. Martic, I., G. Chillcce, M. Tello Ruiz, J. Ramirez, N. Degiuli, and O. el Moctar(2019), Numerical assessment of added resistance in waves of the DTC container ship in finite water depths. In Proceedings of the 5th MASHCON, Ostend, Belgium, 19-23 May 2019.
  13. Park, S. H., G. H. Oh, S. H. Rhee, B. Y. Koo, and H. S. Lee(2015), Full scale wake prediction of an energy saving device by using computational fluid dynamics. Ocean Engineering Vol. 101, pp. 254-263. https://doi.org/10.1016/j.oceaneng.2015.04.005
  14. PIANC(1992), Capability of ship manoeuvring simulation models for approach channels and fairways in harbours. Report of working group no. 20 of permanent technical committee II. Supplement to PIANC bulletin, 1992, No. 77.
  15. Tang, X., S. Tong, G. Huang, and G. Xu(2020), Numerical investigation of the maneuverability of ships advancing in the non-uniform flow and shallow water areas, Ocean Engineering, Vol. 195, 106679. https://doi.org/10.1016/j.oceaneng.2019.106679
  16. Terziev, M., T. Tezdogan, E. Oguz, T. Gourlay, Y. K. Demirel, and A. Incecik(2018), Numerical investigation of the behaviour and performance of ships advancing through restricted shallow waters, Journal of Fluids and Structures, Vol. 76, pp. 185-215. https://doi.org/10.1016/j.jfluidstructs.2017.10.003
  17. Tezdogan, T., A. Incecik, and O. Turan(2016), A numerical investigation of the squat and resistance of ships advancing through a canal using CFD, Journal of Marine Science and Technology, Vol. 21, pp. 86-101. https://doi.org/10.1007/s00773-015-0334-1
  18. Toxopeus, S. L., C. D. Simonsen, E. Guilmineau, M. Visonneau, T. Xing, and F. Stern(2013), Investigation of water depth and basin wall effects on KVLCC2 in manoeuvring motion using viscous-flow calculations, Journal of Marine Science and Technology, Vol. 18, pp. 471-496. https://doi.org/10.1007/s00773-013-0221-6
  19. Verwilligen, J., K. Eloot, M. Mansuy, and M. Vantorre(2019), Full-scale measurements of vertical motions on ultra large container vessels in Scheldt estuary, Ocean Engineering, Vol. 188, 106264. https://doi.org/10.1016/j.oceaneng.2019.106264
  20. Xu, H., M. A. Hinostroza, Z. Wang, and C. Guedes Soares(2020), Experimental investigation of shallow water effect on vessel steering model using system identification method, Ocean Engineering, Vol. 199, 106940. https://doi.org/10.1016/j.oceaneng.2020.106940
  21. Yuan, S., L. Xia, Z. J. Zou, and L. Zou(2019), CFD-based numerical prediction of vertical motions and resistance for DTC container carrier in shallow water waves. In Proceedings of the 5th MASHCON, Ostend, Belgium, 19-23 May 2019.
  22. Yun, K. H., B. J. Park, and D. J. Yeo(2014a), Experimental study of ship squat for KCS in shallow water, Journal of the Society of Naval Architects of Korea, Vol. 51, No. 1, pp. 34-41. https://doi.org/10.3744/SNAK.2014.51.1.34
  23. Yun, K. H., K. R. Park, and B. J. Park(2014b), Study of ship squat for KVLCC2 in shallow water, Journal of the Society of Naval Architects of Korea, Vol. 51, No. 6, pp. 539-547. https://doi.org/10.3744/SNAK.2014.51.6.539
  24. Zeng, Q., R. Hekkenberg, and C. Thill(2019), On the viscous resistance of ships sailing in shallow water, Ocean Engineering, 2019, Vol. 190, 106434. https://doi.org/10.1016/j.oceaneng.2019.106434
  25. Zeng, Q., R. Hekkenberg, C. Thill, and H. Hopman(2020), Scale effects on the wave-making resistance of ships sailing in shallow water, Ocean Engineering, Vol. 212, 107654. https://doi.org/10.1016/j.oceaneng.2020.107654