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유체력 모델과 조종 운동 시뮬레이션을 통한 수상함의 조종성능 추정에 관한 연구
여홍구(H. Yeo),박종열(J. Park),석우찬(W. Seok),이신형(S.H. Rhee),박성찬(S.-C. Park) 한국전산유체공학회 2020 한국전산유체공학회지 Vol.25 No.4
In this study, empirical formulae for estimating maneuvering coefficients in the mathematical maneuvering model were modified for surface combatants. The three-degrees-of-freedom model suggested by the Mathematical Modeling Group (MMG) was introduced for predicting maneuverability of two naval surface combatant models. The maneuvering coefficients were obtained by the empirical formulae adjusted based on captive model test results to reflect such slender and fast surface combatants’ hull design characteristics. In the maneuvering simulation by the modified empirical formulae, the maneuverability criteria showed good agreement with the experimental database.
Dynamic Mesh 기법을 통한 X-형 제어판 배치 잠수함의 가상구속모형시험
천기현(K.H. Cheon),석우찬(W.C. Seok),박종열(J.Y. Park),서정화(J.H. Seo),이신형(S.H. Rhee) 한국전산유체공학회 2018 한국전산유체공학회지 Vol.23 No.2
X-form configuration of a submarine has advantages of better manoeuvrability than the cruciform configuration, which has been traditionally used. The X-form configuration has a much longer span of control planes than those of the cruciform configuration, so it has the advantage of generating larger control force. Its control system, however, is complex, because horizontal and vertical forces induced by control planes were coupled. For the reason above, its dynamic characteristics should be analysed by identifying a dynamic modelling and deriving hydrodynamic derivatives. The present study carried out for a submarine with an X-form configuration. The test model was BB2, of which design was open most recently by Maritime Research Institute Netherlands. The hydrodynamic force on the BB2 model was estimated using virtual Planar Motion Mechanism test using Computational Fluid Dynamics(CFD). To to this, SNUFOAM, an object-oriented open source CFD tool-kit, was used as a solver for Unsteady Reynolds-Averaged Navier-Stokes simulation. Standard k-ε was selected for turbulence model and dynamic mesh methods was used for dynamic PMM tests.