지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.4
- 수록면
- 123 - 130 (8page)
이용수
초록· 키워드
오류제보하기
The flow around a curved riser exposed to the current in various directions was investigated at a Reynolds number of 100 using a numerical simulation. The present study found that the flow features of the curved riser were distinct from those of a straight riser as a result of its large radius of curvature. Namely, there were various wake patterns according to the flow’s incident angle. As the incident angle increased from 0° to 90°, a two-row street of vortices that developed along the centerline of the curved riser became more apparent. However, when the incident angle approached 180° from 90°, these vortices were completely suppressed by the interaction between the wake and an axial flow induced by the curvature of the riser. To identify this feature, the sectional force coefficients were also considered, and it was found that the force coefficients could be different from those found in a sectional analysis based on the strip theory when investigating vortex-induced vibration. As a result, this kind of study would be important to realistically estimate the riser VIV (vortex-induced vibration) and fatigue life, and a new force coefficient database that includes the three-dimensional effect should be established.
목차
ABSTRACT
1. 서론
2. 수치해석 상세
3. 해석 결과 분석
4. 결론
References
참고문헌 (19)
참고문헌 신청
Assi, G.R.S., Srinil N., Freire, C.M., Korkischko, I., 2014. Experimental Investigation of the Flow-induced Vibration of a Curved Cylinder in Convex and Concave configurations. Journal of Fluids and Structures, 44, 52-66. https://doi.org/ 10.1016/j.jfluidstructs.2013.10.011
de Vecchi, A., Sherwin, S.J., Graham, J.M.R., 2008. Wake Dynamics of External Flow Past a Curved Circular cylinder with the Free-stream Aligned to the Plane of Curvature. Journal of Fluids and Structures, 24(8), 1262-1270. https://doi.org/10.1016/ j.jfluidstructs.2008.06.008
Franke, R., Rodi, W., Schonung, B., 1990. Numerical Calculation of Laminar Vortex-shedding Flow Past Cylinders. Journal of Wind Engineering and Industrial Aerodynamics 35, 237-257. https://doi.org/10.1016/0167-6105(90)90219-3
Gallardo, J.P., Andersson, H.I., Pettersen, B., 2014a. Turbulent Wake behind a Curved Circular Cylinder. Journal of Fluid Mechanics, 742, 192-229. https://doi.org/10.1017/jfm.2013.622
Gallardo, J.P., Pettersen, B., Andersson, H.I., 2014b. Coherence and Reynolds Stresses in the Turbulent Wake behind a Curved Circular Cylinder. Journal of Turbulence, 15(12), 883-904. https://doi.org/10.1080/14685248.2014.944617
de Vecchi, A., Sherwin, S.J., Graham, J.M.R., 2008. Wake Dynamics of External Flow Past a Curved Circular cylinder with the Free-stream Aligned to the Plane of Curvature. Journal of Fluids and Structures, 24(8), 1262-1270. https://doi.org/10.1016/ j.jfluidstructs.2008.06.008
Franke, R., Rodi, W., Schonung, B., 1990. Numerical Calculation of Laminar Vortex-shedding Flow Past Cylinders. Journal of Wind Engineering and Industrial Aerodynamics 35, 237-257. https://doi.org/10.1016/0167-6105(90)90219-3
Gallardo, J.P., Andersson, H.I., Pettersen, B., 2014a. Turbulent Wake behind a Curved Circular Cylinder. Journal of Fluid Mechanics, 742, 192-229. https://doi.org/10.1017/jfm.2013.622
Gallardo, J.P., Pettersen, B., Andersson, H.I., 2014b. Coherence and Reynolds Stresses in the Turbulent Wake behind a Curved Circular Cylinder. Journal of Turbulence, 15(12), 883-904. https://doi.org/10.1080/14685248.2014.944617
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UCI(KEPA) : I410-ECN-0101-2019-454-000689573