| Physical modeling and swirling strength analysis of vortex shedding from near-bed piggyback pipelines | |
Zang ZP(臧志鹏) ; Gao FP(高福平); Cui JS(崔金声); Gao, FP (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
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| Source Publication | APPLIED OCEAN RESEARCH
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| 2013-03 | |
| Volume | 40Pages:50-59 |
| ISSN | 0141-1187 |
| Abstract | The vortex shedding from near-bed piggyback pipelines in a steady flow has been investigated experimentally in a large water flume. A specially arranged PIV system with upward-illumination of pulsed laser arrays from the flume bottom was employed for the flow visualization and quantitative measurement of the lee-wake flow in a sub-critical regime around the piggyback pipelines in the proximity of a plane boundary. Based on dimensional analyses, a dimensionless maximum swirling strength (W-m) is used for analyzing the vortex shedding intensity and its frequency. Time-averaged swirling strength analyses indicate that the lee-wake patterns for the near-bed piggyback pipelines are dependent on the configuration factors, including the gap-to-diameter ratio (e/D), the spacing-to-diameter ratio (G/D), and the diameter ratio of two pipes (d/D), etc. The swirling strength in the lee-wake is obviously asymmetric for piggyback pipelines with bed proximity. For the fixed values of G/D and d/D, the maximum swirling strength decreases with the decrease of e/D. Moreover, for the examined G/D range (0 <= G/D <= 0.5), minimum values of W-m and corresponding VIV amplitude for the piggyback pipelines are evidently within the same range of spacing-to-diameter ratio G/D approximate to 0.05-0.20. |
| Keyword | Piggyback Pipelines Vortex Shedding Swirling Strength Viv Suppression |
| Subject Area | 流固耦合作用 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000316533800006 |
| Funding Organization | National Natural Science Foundation of China [51109202, 11232012] |
| Department | LMFS流固土耦合力学(LHO) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46877 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Gao, FP (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Zang ZP,Gao FP,Cui JS,et al. Physical modeling and swirling strength analysis of vortex shedding from near-bed piggyback pipelines[J]. APPLIED OCEAN RESEARCH,2013,40:50-59. |
| APA | Zang ZP,Gao FP,Cui JS,&Gao, FP .(2013).Physical modeling and swirling strength analysis of vortex shedding from near-bed piggyback pipelines.APPLIED OCEAN RESEARCH,40,50-59. |
| MLA | Zang ZP,et al."Physical modeling and swirling strength analysis of vortex shedding from near-bed piggyback pipelines".APPLIED OCEAN RESEARCH 40(2013):50-59. |
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