Characteristics of the horseshoe vortex at a cylindrical pile under a current and combined waves and current

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	Characteristics of the horseshoe vortex at a cylindrical pile under a current and combined waves and current
	Qi WG(漆文刚); Xu K(徐凯); Liu J(刘俊); Gao FP(高福平)
会议录名称	Proceedings of the International Offshore and Polar Engineering Conference
	2019
页码	3434-3441
会议名称	29th International Ocean and Polar Engineering Conference, ISOPE 2019
会议日期	June 16, 2019 - June 21, 2019
会议地点	Honolulu, HI, United states
摘要	The horseshoe vortex (HSV) plays a key role in initiating and promoting the scouring process around a pile. In this study, the characteristics of the HSV at the symmetry plane at a cylindrical pile were experimentally investigated using Particle Image Velocimetry (PIV) technique for pile Reynolds numbers ranging from 12000 to 76000. Both the time-averaged and instantaneous characteristics of the HSV under a current and combined waves and current were analyzed. The experimental results under a pure current indicate a generally unified curve for the distribution of the instantaneous maximum swirling strength normalized with the peak swirling strength under various current velocities. The instantaneous HSVs with the swirling strength much lower than Ωpeak are present for the largest percentage of time. Superimposition of waves significantly affects the characteristics of the HSV at the pile. For a fixed value of pile Reynolds number spanning the present flow conditions, the peak value of the swirling strength for combined waves and current is generally lower than the pure current. © 2019 by the International Society of Offshore and Polar Engineers (ISOPE).
关键词	Combined waves and current Horseshoe vortex PIV technique Swirling strength
ISBN号	9781880653852
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85101
专题	流固耦合系统力学重点实验室
作者单位	1.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China 2.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Qi WG,Xu K,Liu J,et al. Characteristics of the horseshoe vortex at a cylindrical pile under a current and combined waves and current[C]Proceedings of the International Offshore and Polar Engineering Conference,2019:3434-3441.

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