KLNG선 모형 주위의 유동계산 비교
The Comparison of Flow Simulation Results around a KLNG Model Ship
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조회
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다운로드
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참고문헌
키워드
초록
Numerical simulations have been carried out for a 138K LNG Carrier (KLNG) model ship with free surface, using WAVIS 2.0 and Fluent 6.3.26 with various values and different grid densities. Level-set method for free surface capturing was adopted in WAVIS, while VOF has been used in Fluent. The calculated results were compared with the experiment data. Resistance coefficient, wave pattern, wave profile along the hull surface, axial velocity contours and transverse vectors had been analyzed. When the first value was fixed at 60, the simulation results from both WAVIS and Fluent were improved as the number of grids increased. The convergence time of WAVIS was much shorter than that of Fluent. Furthermore, WAVIS predicted the velocity field and the wave profile along the hull surface better than Fluent. However, Fluent gave better wave patterns.
Abstract
Numerical simulations have been carried out for a 138K LNG Carrier (KLNG) model ship with free surface, using WAVIS 2.0 and Fluent 6.3.26 with various values and different grid densities. Level-set method for free surface capturing was adopted in WAVIS, while VOF has been used in Fluent. The calculated results were compared with the experiment data. Resistance coefficient, wave pattern, wave profile along the hull surface, axial velocity contours and transverse vectors had been analyzed. When the first value was fixed at 60, the simulation results from both WAVIS and Fluent were improved as the number of grids increased. The convergence time of WAVIS was much shorter than that of Fluent. Furthermore, WAVIS predicted the velocity field and the wave profile along the hull surface better than Fluent. However, Fluent gave better wave patterns.
참고문헌 (6)
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- 김진, "LNG 운반선의 자유수면을 포함한 자항상태 난류유동장의 수치해석", 대한조선학회 논문집, 42(6), pp.583~592 (2005), 대한조선학회
- 김형태, "LNG 운반선에 대한 수치해 변화에 영향을 주는 요소에 관한 연구", 대한조선학회 논문집, 43(6), pp.656~666 (2006), 대한조선학회
- Rhee S.H., "Unstructured Grid Based Navier-Stokes Sover for Free-Surface Flow around Surface Ships", Proc. of CFD Workshop Tokyo, pp.474~479 (2005)
- Van S.H., "Measurement of Flow around KRISO 138K LNG Carrier Model", Journal of the Society of Naval Architects of Korea, 40(2), pp.1~10 (2003)
- Van S.H., "Flow measurement around a model ship with propeller and rudder", Experiments in Fluids, 40, pp.533~545 (2006)