Journal of Advanced Research in Ocean Engineering

  • 제3권4호
  • /
  • Pages.193-203
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  • 2017
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  • 2384-1052(pISSN)
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  • 2384-1060(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
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Study on Steady Flow Effects in Numerical Computation of Added Resistance of Ship in Waves

  • Lee, Jae-Hoon (Seoul National University, Department of Naval Architecture and Ocean Engineering) ;
  • Kim, Beom-Soo (Seoul National University, Department of Naval Architecture and Ocean Engineering) ;
  • Kim, Yonghwan (Seoul National University, Department of Naval Architecture and Ocean Engineering)
  • 투고 : 2017.10.24
  • 심사 : 2017.12.13
  • 발행 : 2017.12.31
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초록

This study investigated the steady-flow effects present in the numerical computation of the resistance added to a ship in waves. For a ship advancing in the forward direction, a time-domain 3D Rankine panel method is applied to solve the ship motion problem, and the added resistance due to waves is calculated using a near-field method, with the direct integration of the second-order pressure on the hull surface. In the linear potential theory, the steady flow is approximated by the basis potential of a uniform flow or double-body flow in order to linearize the boundary conditions. By applying these two different linearization schemes, the coupling effects between steady and unsteady solutions were examined. Furthermore, in order to analyze the steady-flow effects on the hull geometry, the computation results for two realistic hull forms, a KVLCC2 tanker and DTC containership, were compared. In particular, the mj term, which represents the coupling effects under the body boundary condition, was evaluated considering the geometry of a non-wall-sided ship. Lastly, the characteristics of the linearization schemes were examined in relation to the disturbed waves around a ship and the components of added resistance.

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참고문헌

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