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

  • 제58권3호
  • /
  • Pages.158-166
  • /
  • 2021
  • /
  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
권호 표지
DOI QR코드

DOI QR Code

수심 변화에 따른 볼라드 당김 및 과부하 조건에서의 다중 포드 추진 쇄빙선박의 여유추력 추정에 대한 수치해석적 연구

Study on Prediction of Net Thrust of Multi-Pod-Driven Ice-Breaking Vessel Under Bollard Pull and Overload Conditions According to the Change of Water Depth Using Computational Fluid Dynamics-Based Simulations

  • 투고 : 2021.02.19
  • 심사 : 2021.03.21
  • 발행 : 2021.06.20
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, a numerical analysis technique using a body force model is investigated to estimate the available net thrust of multi-pod-driven ice-breaking vessels under bollard pull and overload conditions. To employ the body force model in present flow simulations, drag and thrust components acting on the pod unit are calculated by using Propeller Open Water (POW) test data. The available net thrusts according to the direction of operation are evaluated in both bollard pull and overload conditions under deep water. The simulation results are compared with the model test data. The available net thrusts, calculated by the present analysis for ahead operating modes at 3~6 knots which are typical speeds of the target vessel in arctic field, are agreed well with the model test results. It is also found that the present result for astern operating mode appears approximately 6 % larger than the model test result. In addition, the available net thrusts are calculated under the both operating conditions accompanied by shallow water effects, and the main cause of the difference is studied. Based on the result of the present study, it is confirmed that the body force model can be applied to the performance evaluation of multi-pod propulsion system and the main engine selection in early design stage of the vessel.

키워드

참고문헌

  1. Jeong, S.Y. et al., 2017. Implementation of ship performance test in brash ice channel. Ocean Engineering, 140, pp.57-65. https://doi.org/10.1016/j.oceaneng.2017.05.008
  2. Jeong, S.Y. et al., 2018. A study of ship resistance characteristics for ice-strengthened vessel by broken ice channel width and size of broken ice pieces. Journal of the Society of Naval Architects of Korea, 55(1), pp.22-27. https://doi.org/10.3744/SNAK.2018.55.1.22
  3. Kashteljan, V.I., Poznyak, I.I., & Ryvlin, A.Ia., 1969. Ice resistance to motion of a ship. Marine Computer Application Corpoeration, Leningrad.
  4. Rules for the classification and construction of sea-going ships, Russian Maritime Register of Shipping, 2016 Edition. Part II Hull, pp.134-138.
  5. Rules for the classification and construction of sea-going ships, Russian Maritime Register of Shipping, 2016 Edition. Part VII Machinery Installations, pp.10-12.
  6. Rules for the classification and construction of sea-going ships, Russian Maritime Register of Shipping, 2019 Edition. Part I Classification, pp.14.
  7. Sydney Goldstein., 1929. On the vortex theory of screw propellers. Royal society, 123, pp.440-465.