Numerical investigation on VIV suppression of marine riser with triangle groove strips attached on its surface
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
The effects of Triangle Groove Strips (TGS) on Vortex-induced Vibration (VIV) suppression of marine riser are numerically investigated using Computational Fluid Dynamics (CFD) method. The range of Reynolds number in simulations is 4.0 104 < Re < 1.2 105. The two-dimensional unsteady Reynolds-Averaged Navier-Stokes (RANS) equations and Shear Stress Transport (SST) k-u turbulence model are used to calculate the flow around marine riser. The Newmark-b method is employed for evaluating the structure dynamics of marine riser. The effect of the height ratio (ε) of TGS on VIV suppression is evaluated. The amplitude responses, frequency responses, vortex patterns and the flow around the structures are discussed in detail. With the increase of the height ratio of TGS, the suppression effect of TGS on VIV suppression is improved firstly and then weakened. When ε ¼ 0.04, the suppression effect of TGS is the best. Compared with the VIV responses of smooth marine riser, the amplitude ratio is reduced by 38.9%, the peak of the lift coefficient is reduced by 69% and the peak of the drag coefficient is reduced by 40% when Re ¼ 6.0 104. With the increase of Reynolds number, the suppression effect of TGS on VIV suppression is improved firstly and then weakened. When the Reynolds number is 7.0 104, the amplitude ratio can be reduced by 40.1%. As to the large-amplitude vibration cases, the TGS show nice suppression effect on VIV.
Abstract
The effects of Triangle Groove Strips (TGS) on Vortex-induced Vibration (VIV) suppression of marine riser are numerically investigated using Computational Fluid Dynamics (CFD) method. The range of Reynolds number in simulations is 4.0 104 < Re < 1.2 105. The two-dimensional unsteady Reynolds-Averaged Navier-Stokes (RANS) equations and Shear Stress Transport (SST) k-u turbulence model are used to calculate the flow around marine riser. The Newmark-b method is employed for evaluating the structure dynamics of marine riser. The effect of the height ratio (ε) of TGS on VIV suppression is evaluated. The amplitude responses, frequency responses, vortex patterns and the flow around the structures are discussed in detail. With the increase of the height ratio of TGS, the suppression effect of TGS on VIV suppression is improved firstly and then weakened. When ε ¼ 0.04, the suppression effect of TGS is the best. Compared with the VIV responses of smooth marine riser, the amplitude ratio is reduced by 38.9%, the peak of the lift coefficient is reduced by 69% and the peak of the drag coefficient is reduced by 40% when Re ¼ 6.0 104. With the increase of Reynolds number, the suppression effect of TGS on VIV suppression is improved firstly and then weakened. When the Reynolds number is 7.0 104, the amplitude ratio can be reduced by 40.1%. As to the large-amplitude vibration cases, the TGS show nice suppression effect on VIV.
참고문헌 (18)
- Artana, G., "Control of the near-wake flow around a circular cylinder with electrohydrodynamic actuators", Exp. Fluid, 35(6), pp.580~588 (2003)
- Assi, G. R. S., "Vortex-induced vibration of a wavy elliptic cylinder", J. Fluids Struct, 80, pp.1~21 (2018)
- Baek, S. J., "Numerical simulation of the flow behind a rotary oscillating circular cylinder", Phys. Fluids, 10(4), pp.869~876 (1998)
- 전정수, "Numerical investigation of vortex shedding and vortex-induced vibration for flexible riser models", International Journal of Naval Architecture and Ocean Engineering, 2(2), pp.112~118 (2010), 대한조선학회
- Zheng-Shou Chen, "Effect of bidirectional internal flow on fluid–structure interaction dynamics of conveying marine riser model subject to shear current", International Journal of Naval Architecture and Ocean Engineering, 4(1), pp.57~70 (2012), 대한조선학회
- Ding, L., "Flow induced motion and energy harvesting of bluff bodies with different cross section", Energy Convers. Manag, 91, pp.416~426 (2015)
- Gao, Y., "Numerical simulation of vortexinduced vibration of a circular cylinder with different surface roughness", Mar. Struct, 57, pp.165~179 (2017)
- Gao, Y., "Vortex-induced vibrations and waves of a long circular cylinder predicted using a wake oscillator model", Ocean Eng, 156, pp.294~305 (2018)
- Khalak, A., "Dynamics of a hydroelastic cylinder with very low mass and damping", J. Fluids Struct, 10(5), pp.455~472 (1996)
- Min Lou, "Experimental study on vortex induced vibration of risers with fairing considering wake interference", International Journal of Naval Architecture and Ocean Engineering, 9(2), pp.127~134 (2017), 대한조선학회
- Li, Z. J., "Optimal control of cylinder wakes via suction and blowing", Comput. Fluids, 32(2), pp.149~171 (2003)
- Newmark, N. M., "A simple approximation for the natural frequencies of partly restrained bars", J. Appl. Mech. -Trans. ASME, 19(4), pp.563~563 (1952)
- Park, H., "Suppression of vortex-induced vibrations of rigid circular cylinder on springs by localized surface roughness at 3.0104 Re 1.2105", Ocean Eng, 111, pp.218~233 (2016)
- Sui, J., "VIV suppression for a large massdamping cylinder attached with helical strakes", J. Fluids Struct, 62, pp.125~146 (2016)
- Wong, E. W. C., "A simplified method to predict fatigue damage of TTR subjected to short-term VIV using artificial neural network", Adv. Eng. Software, 126, pp.100~109 (2018)
- Zdravkovich, M. M., "Review and classification of various aerodynamic and hydrodynamic means for suppressing vortex shedding", J. Wind Eng. Ind. Aerod, 7(2), pp.145~189 (1981)
- Zhu, H. J., "Numerical evaluation of passive control of VIV by small control rods", Appl. Ocean Res, 51, pp.93~116 (2015)
- Zhu, H. J., "Flow-induced vibration of a locally rough cylinder with two symmetrical strips attached on its surface : effect of the location and shape of strips", Appl. Ocean Res, 72, pp.122~140 (2018)