선체 주위 파에 대한 고정도 모사가 선체 저항에 미치는 영향
An Effect of Numerical Region with High Resolution for Kelvin Wave on Ship Resistance
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Reynolds-averaged Navier-Stokes simulations have been performed to investigate an effect of numerical region with high resolution for Kelvin wave around KRISO container ship on its resistance. In the present study, 13 millions cells were used to describe wave profile along the ship hull and Kelvin wave patterns. In order to control a size of numerical region with high resolution for waves around the hull, we employed relaxation zones from a side boundary of numerical domain in which Kelvin wave was suppressed. When the far-field Kelvin wave was not precisely resolved due to the relaxation zone, the instantaneous history of ship resistance was affected although the time average of ship resistance showed –1.15~2.1 % errors. Especially, the damping characteristics of ship resistance in time history was significant when using a large relaxation zone in the side boundary.
Abstract
Reynolds-averaged Navier-Stokes simulations have been performed to investigate an effect of numerical region with high resolution for Kelvin wave around KRISO container ship on its resistance. In the present study, 13 millions cells were used to describe wave profile along the ship hull and Kelvin wave patterns. In order to control a size of numerical region with high resolution for waves around the hull, we employed relaxation zones from a side boundary of numerical domain in which Kelvin wave was suppressed. When the far-field Kelvin wave was not precisely resolved due to the relaxation zone, the instantaneous history of ship resistance was affected although the time average of ship resistance showed –1.15~2.1 % errors. Especially, the damping characteristics of ship resistance in time history was significant when using a large relaxation zone in the side boundary.
참고문헌 (19)
- Afshar, M. A., "Numerical wave generation in OpenFOAMⓇ", Master, pp.2010
- 최정은, "와류생성기를 부착한 선박의 속도성능에 대한 수치적 추정", 대한조선학회 논문집, 46(2), pp.136~147 (2009), 대한조선학회
- Jacobsen, N. G., "A wave generation toolbox for the open-source CFD library : OpenFOAMⓇ", International Journal for Numerical Methods in Fluids, 70, pp.1073~1088 (2012)
- Jun, J. H., "Analysis of flow around ship using unstructured grid", Proceeding of KSCFE Spring Annual Meeting, pp.187~193 (2011)
- CFD RANS simulations on a generic conventional scale model submarine: comparison between Fluent and OpenFOAM, "Jones, D. A.", Defence Science and Technology Group TN-1449, ~ (2015)
- 김진, "KRISO 컨테이너 및 VLCC선형에 대한 RANS시뮬레이션", 대한조선학회 논문집, 42(6), pp.593~600 (2005), 대한조선학회
- Kim, W. J., "Measurement of flows around modern commercial ship models", Experiments in Fluids, 31(5), pp.567~578 (2001)
- 김유철, "Analysis of added resistance and seakeeping responses in head sea conditions for low-speed full ships using URANS approach", International Journal of Naval Architecture and Ocean Engineering, 9(6), pp.641~654 (2017), 대한조선학회
- 김연주, "단파장 영역에서 운항 자세가 KCS의 선체 저항에 미치는 영향", 대한조선학회 논문집, 54(3), pp.258~266 (2017), 대한조선학회[DOI]
- Launder, B. E., "Lectures in mathematical models of turbulence" (1972), Academic Press
- 이상봉, "선체 저항에 대한 수치 해석의 통계적 신뢰도 분석", 대한조선학회 논문집, 51(4), pp.321~327 (2014), 대한조선학회
- Luo, W.Z., "Numerical simulation of viscous flow field around ships in ballast", Journal of Coastal Research, 32(4), pp.911~922 (2016)
- 박동우, "선박의 트림 자세가 저항 성능에 미치는 영향", 대한조선학회 논문집, 50(2), pp.88~94 (2013), 대한조선학회
- 박선호, "Investigation on the wall function implementation for the prediction of ship resistance", International Journal of Naval Architecture and Ocean Engineering, 5(1), pp.33~46 (2013), 대한조선학회
- Peric, R., "Relaible damping of free surface waves in numerical simulations", Ship Technology Research, 63, pp.1~13 (2016)
- Pope, S. B., "Turbulent Flows" (2000), Cambridge University Press
- Tezdogan, T., "Full-scale unsteady RANS simulations of vertical ship motions in shallow water", Journal of Ocean Engineering, 123, pp.131~145 (2016)
- Van, S.H., "Experimental investigation of the flow characteristics around practical hull forms", Proc. of the 3rd Osaka Colloquium on Advanced CFD Applications to Ship Flow and Hull Form Design, pp.215~227 (1998)
- Van, S. H., "Experimental investigation of local flow around KRISO 3600TEU container ship model in towing tank", Journal of the Society of Naval Architects of Korea, 37(3), pp.1~10 (2000)