Physical modelling of local scour at twin piles under combined waves and current
文献类型：期刊论文
| 作者 | Qi WG(漆文刚) ; Li YX; Xu K; Gao FP(高福平)
|
| 刊名 | COASTAL ENGINEERING
 |
| 出版日期 | 2019 |
| 卷号 | 143页码:63-75 |
| 关键词 | Local scour Twin piles Pile-group Skew angle Horseshoe vortex PIV technique Combined waves and current Time scale Equivalent pile diameter |
| ISSN号 | 0378-3839 |
| DOI | 10.1016/j.coastaleng.2018.10.009 |
| 英文摘要 | Under the actions of ocean waves and current, severe local scour can be induced around pile groups, significantly compromising the safety of marine structures. A series of flume tests were conducted for physical modelling the local scouring process around twin piles in the cohesionless soils under combined waves and currents, and compared with the pure current case. The effects of non-dimensional pile spacing (G/D) and flow skew angle (alpha) on the scour depth and time scale of scour around twin piles are intensively examined. The experimental observations indicate that the influence of pile spacing on the scour depth development is much more significant for the side-by-side (alpha = 90 degrees) arrangement than that for the tandem arrangement (alpha = 0 degrees). With the increase of flow skew angle alpha, the maximum scour depth is remarkably enhanced within the examined range 0 <= G/D <= 3.0. When G/D = 3.0, the pile group effect on the time scale is generally negligible for pure current cases, whereas a prominent pile-group effect can still be observed for combined wave-current cases, especially for the side-by-side arrangement. A parameter of "equivalent pile diameter" is then introduced for evaluating the maximum scour depth at the twin piles with the previous formulas for the single pile. Based on the existing and present experimental data, the empirical formula of dimensionless equivalent pile diameter as the function of G/D and alpha is established to predict the maximum scour depth at the twin piles. |
| 分类号 | 一类 |
| WOS关键词 | HORSESHOE VORTEX ; VERTICAL PILES ; MONOPILE |
| WOS研究方向 | Engineering, Civil ; Engineering, Ocean |
| 语种 | 英语 |
| WOS记录号 | WOS:000452817100006 |
| 资助机构 | National Natural Foundation of China [11602273, 11825205] ; Major State Basic Research Development Program of China (973 Program) [2014CB046204] ; Youth Innovation Promotion Association CAS |
| 其他责任者 | Gao, FP |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/78481]  |
| 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.{Qi, Wen-Gang、Li, Yi-Xuan、Xu, Kai、Gao, Fu-Ping} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 2.{Qi, Wen-Gang、Li, Yi-Xuan、Xu, Kai、Gao, Fu-Ping} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.{Li, Yi-Xuan} China State Construct Engn Corp Ltd, Civil Infrastruct Operat Dept, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qi WG,Li YX,Xu K,et al. Physical modelling of local scour at twin piles under combined waves and current[J]. COASTAL ENGINEERING,2019,143:63-75. |
| APA | 漆文刚,Li YX,Xu K,&高福平.(2019).Physical modelling of local scour at twin piles under combined waves and current.COASTAL ENGINEERING,143,63-75. |
| MLA | 漆文刚,et al."Physical modelling of local scour at twin piles under combined waves and current".COASTAL ENGINEERING 143(2019):63-75. |
入库方式： OAI收割
来源：力学研究所
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