Vortex-induced vibration of two parallel risers: Experimental test and numerical simulation

详细信息    查看全文

• 作者：Weiping Huang ; Yang Zhou ; Haiming Chen
• 关键词：vortex ; induced vibration ; riser ; CFX ; drag force ; lift force
• 刊名：Journal of Ocean University of China
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：15
• 期：2
• 页码：247-253
• 全文大小：896 KB
• 参考文献：Bearman, P. W., 1984. Vortex shedding from oscillating bluff bodies. Annual Review of Fluid Mechanics, 16: 195–222.CrossRef
  Breuer, M., De Nayer, G., Munsch, M., Gallinger, T., and Wuchner, R., 2012. Fluid-structure interaction using a partitioned semi-implicit predictor-corrector coupling scheme for the application of large-eddy simulation. Journal of Fluids and Structures, 29: 107–130.CrossRef
  Chen, W. L., and Xu, F., 2012. Investigation of a hybrid approach combining experimental tests and numerical simulations to study vortex-induced vibration in a circular cylinder. Journal of Sound and Vibration, 311: 1164–1182.CrossRef
  Govardhan, R., and Williamson, C. H. K., 2000. Modes of vortex formation and frequency response for a freely-vibrating cylinder. Journal of Fluid Mechanics, 420: 85–130.CrossRef
  Huang, K., Chen, H.-C., and Chen, C.-R., 2011. Numerical scheme for riser motion calculation during 3-D VIV simulation. Journal of Fluids and Structures, 27: 947–961.CrossRef
  Huang, S., and Herfjord, K., 2013. Experimental investigation of the forces and motion responses of two interfering VIV circular cylinders at various tandem and staggered positions. Applied Ocean Research, 43: 267–273.
  Huang, S., and Sworn, A., 2013. Hydrodynamic coefficients of two fixed circlular cylinders fitted with helical strakes at various staggered and tandem arrangements. Applied Ocean Research, 43: 21–26.CrossRef
  Huang, W. P., and Chen, H. M., 2011. Study on lift coefficient and drag coefficient of elastic-multi riser based on CFD. Ocean Engineering, 40(2): 94–97.
  Huang, Y. Q., Deng, J., and Ren, A. L., 2003. Research on lift and drag in unsteady viscous flow around circular cylinders. Journal of Zhejiang University, 37(5): 596–601.
  Kang, Z., and Jia, L., 2013. An experiment study of a cylinder’s two degree of freedom VIV trajectories. Ocean Engineering, 70: 129–140.CrossRef
  Mukundan, H., Chasparis, F., Hover, F. S., and Triantafyllou, M. S., 2010. Optimal lift force coefficient databases from riser experiments. Journal of Fluids and Structures, 26: 160–175.CrossRef
  Springer, M., Jaiman, R. K., Cosgrove, S., and Constantinides, Y., 2009. Numerical modeling of vortex-induced vibrations of two flexible risers. The 28th International Conference on Ocean, Offshore and Arctic Engineering. Honolulu, Hawaii, USA.
  Srinill, N., Zanganeh, H., and Day, A., 2013. Two-degree-offreedom VIV of circular cylinder with variable natural frequency ratio: Experimental and numerical investigations. Ocean Engineering, 73: 179–194.CrossRef
  Sun, L., Zong, Z., Dong, J., Dong, G. H., and Liu, C. F., 2012. Stripwise discrete vortex method for VIV analysis of flexible risers. Journal of Fluids and Structures, 35: 21–49.CrossRef
  Wang, Y., Yang, J. M., Li, X., and Lv, H. N., 2010. Research on vortex-induced motions of a floating cylinder in uniform currents. China Offshore Platform, 25(1): 8–15.
  Williamson, C. H. K., and Govardhan, R., 2004. Vortex-induced vibrations. Annual Review of Fluid Mechanics, 36: 413–455.CrossRef
  Williamson, C. H. K., and Govardhan, R., 2008. A brief review of recent results in vortex-induced vibrations. Journal of Wind Engineering and Industrial Aerodynamics, 96: 713–735.CrossRef
  
• 作者单位：Weiping Huang (1)
  Yang Zhou (1) (2)
  Haiming Chen (1)
  
  1. Department of Ocean Engineering, Shandong Key Laboratory of Ocean Engineering, Engineering College, Ocean University of China, Qingdao, 266100, P. R. China
  2. Key Laboratory of Engineering Oceanography, The Second Institute of Oceanography, SOA, Hangzhou, 310012, P. R. China
  
• 刊物主题：Oceanography; Meteorology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1993-5021

文摘

The vortex-induced vibration of two identical rigidly mounted risers in a parallel arrangement was studied using Ansys- CFX and model tests. The vortex shedding and force were recorded to determine the effect of spacing on the two-degree-of-freedom oscillation of the risers. CFX was used to study the single riser and two parallel risers in 2–8D spacing considering the coupling effect. Because of the limited width of water channel, only three different riser spacings, 2D, 3D, and 4D, were tested to validate the characteristics of the two parallel risers by comparing to the numerical simulation. The results indicate that the lift force changes significantly with the increase in spacing, and in the case of 3D spacing, the lift force of the two parallel risers reaches the maximum. The vortex shedding of the risers in 3D spacing shows that a variable velocity field with the same frequency as the vortex shedding is generated in the overlapped area, thus equalizing the period of drag force to that of lift force. It can be concluded that the interaction between the two parallel risers is significant when the risers are brought to a small distance between them because the trajectory of riser changes from oval to curve 8 as the spacing is increased. The phase difference of lift force between the two risers is also different as the spacing changes. Keywords vortex-induced vibration riser CFX drag force lift force