原文传递
Vortex-Synchronization Control around a Partially Submerged Cylinder due to Wave-Following Current
| 题名： | Vortex-Synchronization Control around a Partially Submerged Cylinder due to Wave-Following Current |
| 其他题名： | Andreopoulos,J.,Durst,F.,Zaric,Z.,and Jovanovic,J.(1984)."Influence of Reynolds number on characteristics of turbulent wall boundary layers."Exp.Fluids,2(1),7–16. |
| 正文语种： | 英文 |
| 作者： | Sayahnya Roy |
| 关键词： | Acoustic doppler velocimeter (ADV);Vorticity;Cylinder;Statistical moments;Wave-current flow (WCF) |
| 摘要： | The results of an experimental study on combined wave and current flow around a partially submerged cylinder with a large Reynolds number (R = 5.96104) are reported. The measured instantaneous velocity time-series data were analyzed to acquire insight into the first-, second-, third-, and fourth-order statistical moments. It was observed that turbulence generated because of the surface wave plays a significant role in the occurrence of vortex lock-on, which in turn alters the excitation frequency. For the vortex lock-on case in which the shedding frequency is the same as the natural shedding frequency, the recirculation zone is significantly reduced. However, for higher wave frequencies, the shedding frequency was modulated and the recirculation was somewhat enlarged. The comparative study between only current flow (OCF) and combined wave-current flow (WCF) showed that the intermittency in turbulence was larger for the OCF case (without a cylinder) than for the WCF case. The surface-wave-generated vortices induced around the cylinder interacted with the vorticity shear layers at the side of the cylinder and at the wake region, resulting in the formation of new induced wake vortices. These induced wake vortices controlled the recirculation region behind the cylinder. |
| 出版年： | 2017 |
| 论文唯一标识： | P-108Y2017V143N06003 |
| 英文栏目名称： | TECHNICAL NOTES |
| doi： | 10.1061/(ASCE)WW.1943-5460.0000417 |
| 期刊名称： | Journal of Waterway, Port, Coastal, and Ocean Engineering |
| 拼音刊名(出版物代码)： | P-108 |
| 卷： | 143 |
| 期： | 06 |
| 页码： | 12-19 |
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