Estimating thrust from shedding vortex surfaces in the wake of a flapping plate
文献类型：期刊论文
| 作者 | Tong, Wenwen5; Yang, Yue3,4,5 ; Wang SZ(王士召)1,2
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| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2021-06-04 |
| 卷号 | 920页码:26 |
| ISSN号 | 0022-1120 |
| 关键词 | vortex dynamics propulsion swimming/flying |
| DOI | 10.1017/jfm.2021.434 |
| 通讯作者 | Yang, Yue(yyg@pku.edu.cn) |
| 英文摘要 | We elucidate the vortex dynamics of flows past a flapping plate using the vortex-surface field (VSF) and develop models for estimating thrust from shedding vortex surfaces in wakes. The VSF evolution is calculated from numerical simulation using the immersed boundary method. The VSF visualization reveals that a spoon-like vortex surface dominated by tip vortex lines is formed and periodically shed into the wake owing to the alternating upstroke and downstroke of the flapping plate. We simplify the finite-domain impulse theory based on a particular vortex surface. The simplified theory demonstrates that the force on the plate is only dependent on the vortical impulse and Lamb-vector integral of the vortex surface enclosing the plate. Then, we propose a time-averaged thrust model from near-wake discrete vortex surfaces, where the incorporation of the Lamb-vector integral significantly improves the model estimation from the impulse model. Furthermore, we estimate the mean thrust based on two arbitrary vortex surfaces in the far wake from the linear impulse decay of periodically shedding vortex surfaces, which provides a possible approach to infer the state of the moving body in experimental investigation and practical applications. |
| 分类号 | 一类/力学重要期刊 |
| WOS关键词 | FLUID DYNAMIC FORCES ; AERODYNAMIC FORCE ; LIFT ENHANCEMENT ; VELOCITY-FIELDS ; SWIMMING FISH ; TAYLOR-GREEN ; FREE-FLIGHT ; PERFORMANCE ; LOCOMOTION ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[91952108] ; National Natural Science Foundation of China[11925201] ; National Natural Science Foundation of China[11988102] ; National Natural Science Foundation of China[91841302] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000657855200001 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Yang, Yue |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/86913]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 3.Peking Univ, BIC ESAT, Beijing 100871, Peoples R China; 4.Peking Univ, CAPT, Beijing 100871, Peoples R China; 5.Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Tong, Wenwen,Yang, Yue,Wang SZ. Estimating thrust from shedding vortex surfaces in the wake of a flapping plate[J]. JOURNAL OF FLUID MECHANICS,2021,920:26. |
| APA | Tong, Wenwen,Yang, Yue,&王士召.(2021).Estimating thrust from shedding vortex surfaces in the wake of a flapping plate.JOURNAL OF FLUID MECHANICS,920,26. |
| MLA | Tong, Wenwen,et al."Estimating thrust from shedding vortex surfaces in the wake of a flapping plate".JOURNAL OF FLUID MECHANICS 920(2021):26. |
入库方式： OAI收割
来源：力学研究所
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