Strouhal number for boundary shear flow past a circular cylinder in the subcritical flow regime
文献类型：期刊论文
| 作者 | Liu, Yan1,2 ; Liu, Jun1,2; Gao, Fu-Ping1,2; Gao FP(高福平)
|
| 刊名 | OCEAN ENGINEERING
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 269页码:13 |
| 关键词 | Vortex shedding Bed-proximity effects Shear flow Particle image velocimetry (PIV) Circular cylinder |
| ISSN号 | 0029-8018 |
| DOI | 10.1016/j.oceaneng.2022.113574 |
| 通讯作者 | Gao, Fu-Ping(fpgao@imech.ac.cn) |
| 英文摘要 | Strouhal number (St) is an essential dimensionless quantity for characterizing the vortex-shedding frequency of the flow past a cylinder. In this study, the Strouhal number for a near-wall circular cylinder fully immersed in a boundary shear flow in the subcritical flow regime was experimentally investigated in a water flume. The ve-locity fluctuations and flow fields of the lee-wake were systematically measured with an Acoustic Doppler Velocimeter (ADV) and an upward-illumination Particle Image Velocimetry (PIV) system, respectively. Based on dimensional analyses, a non-dimensional shear parameter (K) is introduced to characterize the shear flow. An explicit expression between K and e/D is obtained on the basis of the boundary theory and verified with the flume measurements. Spectral analysis of wake velocities indicates that the multi-peaks can be identified as the cyl-inder gets closer to the wall. The PIV measurements indicate that the multi-peaks spectra are predominantly induced by the intense interactions between the lower shear layer and wall boundary layer. By fitting the experimental results, empirical relationships for the variations of St with K or e/D are finally established for the subcritical flow regime. |
| WOS关键词 | INDUCED VIBRATIONS ; ORGANIZATION ; MECHANISMS ; PROXIMITY ; FORCES ; WAKE ; WALL |
| 资助项目 | National Natural Science Foundation of China[11825205] ; National Natural Science Foundation of China[12061160463] |
| WOS研究方向 | Engineering ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000913641700001 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/91566]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 通讯作者 | Gao, Fu-Ping |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yan,Liu, Jun,Gao, Fu-Ping,et al. Strouhal number for boundary shear flow past a circular cylinder in the subcritical flow regime[J]. OCEAN ENGINEERING,2023,269:13. |
| APA | Liu, Yan,Liu, Jun,Gao, Fu-Ping,&高福平.(2023).Strouhal number for boundary shear flow past a circular cylinder in the subcritical flow regime.OCEAN ENGINEERING,269,13. |
| MLA | Liu, Yan,et al."Strouhal number for boundary shear flow past a circular cylinder in the subcritical flow regime".OCEAN ENGINEERING 269(2023):13. |
入库方式： OAI收割
来源：力学研究所
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