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Intermittent locomotion of a fish-like swimmer driven by passive elastic mechanism
Dai LZ(戴龙珍); He GW(何国威); Zhang X(张翔); Zhang X(张星); Zhang X(张星)
2018-07-31
发表期刊Bioinspiration & Biomimetics
卷号13页码:056011
摘要

The intermittent locomotion performance of a fish-like elastic swimmer is studied numerically in this paper. The actuation is imposed only at the head and the locomotion is indirectly driven by passive elastic mechanism. For intermittent swimming, certain time durations of passive coasting are interspersed between two half-periods of active bursting. To facilitate the comparison of energy efficiencies in continuous and intermittent swimming at the same cruising speed, we consider both intermittent swimming at various duty cycles and also continuous swimming at reduced actuation frequencies. The result indicates that the intermittent style is more economical than the continuous style only when the cruising Reynolds number is sufficiently large and the duty cycle is moderate.We also explore the passive tail-beating pattern and wake structure for intermittent swimming. It is found that the kinematics of the tail contains a preparatory burst phase which lies in between the active bursting and the passive coasting phases. Three vortex streets are found in the wake structures behind the intermittent swimmers. The two oblique streets consist of strong vortex dipoles and the horizontal street is made up of weak vortices. The results of this study can provide some insight into the burst-and-coast swimming of fish and also inform the design of efficient bio-mimetic underwater vehicles.

关键词Intermittent Swimming Energy Efficiency Elastic Swimmer Fluid-structure Interaction Numerical Simulation
学科领域流体力学
DOI10.1088/1748-3190/aad419
收录类别SCI
语种英语
WOS记录号WOS:000440579500005
课题组名称LNM湍流
论文分区二类/Q1
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77538
专题非线性力学国家重点实验室
通讯作者Zhang X(张星)
作者单位1.中科院力学所非线性力学国家重点实验室
2.中科院大学工程科学学院
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GB/T 7714
Dai LZ,He GW,Zhang X,et al. Intermittent locomotion of a fish-like swimmer driven by passive elastic mechanism[J]. Bioinspiration & Biomimetics,2018,13:056011.
APA Dai LZ,He GW,Zhang X,Zhang X,&张星.(2018).Intermittent locomotion of a fish-like swimmer driven by passive elastic mechanism.Bioinspiration & Biomimetics,13,056011.
MLA Dai LZ,et al."Intermittent locomotion of a fish-like swimmer driven by passive elastic mechanism".Bioinspiration & Biomimetics 13(2018):056011.
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