Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Numerical Study on Towing Stability of LNG Bunkering Barge in Calm Water

LNG 벙커링 바지의 정수 중 예인안정성에 관한 수치연구

  • Oh, Seung-Hoon (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Dong-Ho (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Jae-Hwan (Korea Research Institute of Ships and Ocean Engineering) ;
  • Hwang, Sung-Chul (Korea Research Institute of Ships and Ocean Engineering) ;
  • Cho, Seok-Kyu (Korea Research Institute of Ships and Ocean Engineering) ;
  • Sung, Hong-Gun (Korea Research Institute of Ships and Ocean Engineering)
  • 오승훈 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정동호 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정재환 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 황성철 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 조석규 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 성홍근 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2019.04.05
  • Accepted : 2019.05.23
  • Published : 2019.06.30
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Abstract

In this paper, the towing stability of the LNG bunker barge was estimated. Currently, LNG bunkering barge is being developed for the bunkering of LNG (Liquefied Natural Gas), an eco-friendly energy source. Since the LNG bunkering barge assumes the form of a towed ship connected to the tow line, the towing stability of the LNG bunker barge is crucial f not only for the safety of the LNG bunker barge but also the neighboring sailing vessels. In the initial stages, a numerical code for towing simulation was developed to estimate the towing stability of the LNG bunkering barge. The MMG (Maneuvering Mathematical modeling Group) model was applied to the equations of motion while the empirical formula was applied to the maneuvering coefficients for use in the initial design stage. To validate the developed numerical code, it was compared with published calculation and model test results. Towing simulations were done based on the changing skeg area and the towing position of the LNG bunkering barge using the developed numerical codes. As a result, the suitability of the designed stern skeg area was confirmed.

본 논문에서는 LNG 벙커링 바지에 대한 예인안정성을 평가하였다. 친환경 에너지원인 LNG(액화천연가스)의 전환을 위한 인프라로 LNG 벙커링 바지가 개발되고 있다. LNG 벙커링 바지는 예인줄에 연결되어 이동하는 부선의 형태이기 때문에 LNG 공급용 부선의 예인안정성의 확보는 LNG 벙커링 바지 뿐 만아니라 주변 항해 선박의 안전을 위해 매우 중요하다. LNG 벙커링 바지의 예인안정성을 초기설계 단계에서 추정하기 위해 예인시뮬레이션을 위한 수치코드를 개발하였다. 초기설계 단계에서 활용 가능하도록 운동방정식에는 조종수학그룹 모델이 적용되었고 조종미계수에는 경험식이 적용되었다. 개발된 수치코드의 유효성을 확인하기 위해 발표된 계산 및 모형시험 결과와 비교하였다. 개발된 수치코드를 이용하여 LNG 벙커링 바지의 선미 스케그 면적과 예인 위치의 변화에 따른 예인시뮬레이션을 수행하였다. 수행된 시뮬레이션을 통해 설계된 선미 스케그 면적의 적정성을 확인하였다.

Keywords

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Fig. 1 Mathematical model for towing barge

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Fig. 2 Towing stability criteria

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Fig. 3 Comparison of time histories for 1B

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Fig. 4 Comparison of time histories for 2B without skeg

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Fig. 5 Three dimensional geometry of hull

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Fig. 6 Calm water resistance model of LNG bunkering barge

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Fig. 7 Section model for 2D added mass calculation

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Fig. 8 Trajectory of LNG bunkering barge(W/O skeg)

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Fig. 9 Time histories for LNG bunkering barge(W/O skeg)

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Fig. 10 Capable space for the stern skeg

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Fig. 11 Time histories of heading angle according to variation of stern skeg area

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Fig. 12 Schematic diagram for towline and bridle

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Fig. 13 Time histories of heading angle according to variation of Bridle length

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Fig. 14 Stern skeg for LNG bunkering barge

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Fig. 15 Trajectory of LNG bunkering barge(W/ skeg)

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Fig. 16 Time histories for LNG bunkering barge(W/ skeg)

Table 1 Principal dimensions for Yasukawa's barge (Yasukawa et al., 2006)

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Table 2 Particulars of LNG bunkering barge

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References

  1. Bernitsas, M. M. and Kekridis, N. S.(1985), "Simulation and stability of ship towing", International Shipbuilding Progress, Vol 32, No. 369, pp. 112-123. https://doi.org/10.3233/ISP-1985-3236901
  2. Inoue, S., Hirano, M., Hirakawa, Y. and Mukai, K.(1979a), "The hydrodynamic derivatives on ship manoeuvrabihty in even keel condition", Transactions of the WestJapan Society of Naval Architects, No. 57, pp. 13-19.
  3. Inoue, S., Hirano, M. and Mukai, K.(1979b), "The non-Linear terms of lateral force and moment acting on ship hull in the case of manoeuvring", Transactions of the WestJapan Society of Naval Architects, No. 58, pp. 153-160.
  4. Jacobs, W. R.(1963), "Method of Predicting Course Stability and Turning Qualities of Ships", Davidson Laboratory Report 945. Davidson Laboratory: New Jersey.
  5. Jung, D. H., Oh, S. H., Jung, J. H., Hwang, S. C., Sung, H. G., Lee, J. I. and Kim E. S.(2018), "Development of the First LNG Bunkering Barge System in Korea", Proceedings of the Annual Autumn Meeting the Korean Institute of Navigation and Port Reasearch, pp. 162-163.
  6. Kown, C. S.(2015), "A study on Directional Stability of Towed Floating Bodies by Computational Fluid Dynamics", Korea Advanced Institute of Science and Technology, Ph.D. Dissertation.
  7. Lee, S. K. and Kim, S. J.(1995), "Pridiction of Maneuverability of a Ship in the Initial Design Stage", Transactions of the Society of Naval Architects of Korea, Vol. 32, No. 4, pp. 19-26.
  8. Motora, S.(1960), "On the measurment of added mass and added moment of inertia of ships in steering motion", Proceedings of the First Symposium on Ship Maneuverability, David Taylor Model Basin Report 1461, Washington D.C., pp. 241-274.
  9. Nam, B. W., Park, J. Y., Hong, S. Y., Sung, H. G. and Kim, J. W.(2013), "Numerical Simulation of Towing Stability of Barges in Calm Water", Journal of Ocean Engineering and Technology, Vol. 27, No. 1, pp. 67-73. https://doi.org/10.5574/KSOE.2013.27.1.067
  10. Wagner, S. L. and Chislett, M. S.(1972), "Xvr' for Models of a Fast Container Vessel and Two Large Tankers, Measured with a Planar Motion Mechanism-Materials for Manoeuvrability Committee Reports to 13 th ITTC".
  11. Yasukawa, H., Hiritaka, H., Nakamura, N. and Matsumoto, Y.(2006), "Simulation of Slewing Motion of a Towed Ship", Journal of the Japan Society of Naval Architects and Ocean Engineers, Vol. 4, pp. 137-146. https://doi.org/10.2534/jjasnaoe.4.137