Underlying principle of efficient propulsion in flexible plunging foils | |
Zhu XJ(朱晓珏); He GW(何国威); Zhang X(张星); Zhang X(张星) | |
发表期刊 | Acta Mechanica Sinica |
2014-12 | |
卷号 | 30期号:6页码:839–845 |
ISSN | 0567-7718 |
摘要 |
Passive flexibility was found to enhance propulsive efficiency in swimming animals. In this study, we numerically investigate the roles of structural resonance and hydrodynamic wake resonance in optimizing efficiency of a flexible plunging foil. The results indicates that (1) optimal efficiency is not necessarily achieved when the driving frequencymatches the structural eigenfrequency; (2) optimal efficiency always occurs when the driving frequencymatches the wake resonant frequency of the time averaged velocity profile. Thus, the underlying principle of efficient propulsion in flexible plunging foil is the hydrodynamic wake resonance, rather than the structural resonance. In addition, we also found that whether the efficiency can be optimized at the structural resonant point depends on the strength of the leading edge vortex relative to that of the trailing edge vortex. The result of this work provides new insights into the role of passive flexibility in flapping-based propulsion. |
关键词 | Flexibility Propulsive Efficiency Structural Resonance Hydrodynamic Wake Resonance |
学科领域 | 流体力学 |
DOI | 10.1007/s10409-014-0114-x |
URL | 查看原文 |
收录类别 | SCI ; EI ; CSCD |
语种 | 英语 |
WOS记录号 | WOS:000348990100008 |
项目资助者 | The project was supported by the National Natural Science Foundation of China (11232011, 11021262, and 11023001) and the National Basic Research Program ofChina (2013CB834100). |
CSCD记录号 | CSCD:5331823 |
课题组名称 | LNM湍流 |
论文分区 | 二类 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/49536 |
专题 | 非线性力学国家重点实验室 |
通讯作者 | Zhang X(张星) |
推荐引用方式 GB/T 7714 | Zhu XJ,He GW,Zhang X,et al. Underlying principle of efficient propulsion in flexible plunging foils[J]. Acta Mechanica Sinica,2014,30,6,:839–845. |
APA | Zhu XJ,He GW,Zhang X,&张星.(2014).Underlying principle of efficient propulsion in flexible plunging foils.Acta Mechanica Sinica,30(6),839–845. |
MLA | Zhu XJ,et al."Underlying principle of efficient propulsion in flexible plunging foils".Acta Mechanica Sinica 30.6(2014):839–845. |
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