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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)
Source PublicationActa Mechanica Sinica
2014-12
Volume30Issue:6Pages:839–845
ISSN0567-7718
Abstract
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.
KeywordFlexibility Propulsive Efficiency Structural Resonance Hydrodynamic Wake Resonance
Subject Area流体力学
DOI10.1007/s10409-014-0114-x
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000348990100008
Funding OrganizationThe project was supported by the National Natural Science Foundation of China (11232011, 11021262, and 11023001) and the National Basic Research Program ofChina (2013CB834100).
CSCD IDCSCD:5331823
DepartmentLNM湍流
Classification二类
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49536
Collection非线性力学国家重点实验室
Corresponding AuthorZhang X(张星)
Recommended Citation
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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