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

The Society of Naval Architects of Korea (대한조선학회)
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A Comparative Study of Numerical and Theoretical Predictions of Oil Outflows from Damaged Ships

손상 선박 기름 유출량 추정을 위한 수치해석과 이론식의 비교 연구

  • Yo-Seop, Moon (Dept. of Naval Architecture & Ocean Engineering, Dong-Eui Univ.) ;
  • Je-In, Kim (Dept. of Naval Architecture & Ocean Engineering, Dong-Eui Univ.) ;
  • Il-Ryong, Park (Dept. of Naval Architecture & Ocean Engineering, Dong-Eui Univ.) ;
  • Seong-Bu, Suh (Dept. of Naval Architecture & Ocean Engineering, Dong-Eui Univ.) ;
  • Seung-Guk, Lee (Korea Research Institute of Ships & Ocean Engineering) ;
  • Hyuek-Jin, Choi (Korea Research Institute of Ships & Ocean Engineering) ;
  • Sa-Young, Hong (Korea Research Institute of Ships & Ocean Engineering)
  • 문요섭 (동의대학교 조선해양공학과) ;
  • 김제인 (동의대학교 조선해양공학과) ;
  • 박일룡 (동의대학교 조선해양공학과) ;
  • 서성부 (동의대학교 조선해양공학과) ;
  • 이승국 (선박해양플랜트연구소) ;
  • 최혁진 (선박해양플랜트연구소) ;
  • 홍사영 (선박해양플랜트연구소)
  • Received : 2022.09.30
  • Accepted : 2022.10.21
  • Published : 2022.12.20
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Abstract

This paper provides the results of numerical and theoretical predictions of oil outflows from damaged single-hull and double-hull ships.Theoretical equations derived from the unsteady Bernoulli equation and a CFD method for multi-phase flow analysis were used to estimate the oil outflow rate from cargo tank. The predicted oil outflow rate from a single-hull cargo tank damaged due to grounding and collision accidents showed a good agreement with the available experimental results in both numerical and theoretical analyses. However, in the case of the double-hull conditions, the time variation of the amount of water and oil mixture inside the ballast tank predicted by the theoretical equation showed some different behavior from the numerical results. The reason was that the interaction of the oil flow with the water inflow in the ballast tank was not reflected in the theoretical equations. In the problems of the initial pressure condition in the cargo and ballast tanks, the oil outflow and water inflow were delayed at the pressure condition that the tanks were sealed. When the flow interaction between the oil and water in the ballast tank was less complicated, the theoretical and the numerical results showed a good agreement with each other.

Keywords

Acknowledgement

본 논문은 2022년 해양경찰청 재원으로 해양수산과학기술진흥원의 지원을 받아 수행된 연구입니다(해양오염방지 긴급구난 의사결정 지원기술 개발, PMS5400).

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