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

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	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)
	2019
会议日期	June 16, 2019 - June 21, 2019
会议地点	Honolulu, HI, United states
关键词	Combined waves and current Horseshoe vortex PIV technique Swirling strength
页码	3434-3441
英文摘要	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).
会议录	Proceedings of the International Offshore and Polar Engineering Conference
语种	英语
ISBN号	9781880653852
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85101]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China 2.Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, 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]. 见:. Honolulu, HI, United states. June 16, 2019 - June 21, 2019.