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Title:
间歇式俯仰转动扑翼的自主推进
Alternative Title: Self-propulsion of a flapping foil powered by intermettent pitching motion
Author: 戴龙珍1,2; 张星1,2
Source: 空气动力学学报
Issued Date: 2018-02
Volume: 36, Issue:1, Pages:151-155
Abstract:

  很多飞行和游动的生物采用主动驱动和被动滑行交替的运动方式。本研究通过比较间歇式和连续式驱动扑翼的自主推进性能,试图回答间歇式驱动能否节省能耗的问题。研究采用数值方法求解耦合的Navier-Stokes方程和扑翼运动的动力学方程。我们模拟了不同频率的连续式驱动以及给定频率不同占空比的间歇式驱动。结果表明,在达到相同平均推进速度条件下,如果推进速度较高间歇式驱动所需的能耗更低,如果速度较低则连续式驱动的能耗较低。我们还对比了连续式和间歇式驱动产生的不同流场结构。该研究得到的结果可以为高效仿生水下航行器的设计提供帮助。

English Abstract:

  Many animals adopt the intermittent gaits (burst-and-coast or flapping-and-gliding) during flying or swimming. We compare the performances of self-propelled foils driven by intermittent and continuous pitching motions, and attempt to answer the question whether the intermittent gaits are more efficient. Numerical simulations are conducted by solving the Navier-Stokes equations together with the dynamics equations of the foil. We study cases of continuous pitching at various frequencies and also cases of intermittent pitching at a fixed frequency but different duty cycles. The results indicate that for a given cruising speed, the continuous gait is more efficient at lower speed, while the intermittent gait is more efficient at higher speed. The different flow structures produced by the continuous and intermittent gaits are presented. The results obtained in this work can inform the design of efficient bio-inspired underwater vehicles.

Keyword: flapping foil ; self-propulsion ; intermittent pitching ; immersed boundary method
Language: 中文
Indexed Type: CSCD
Corresponding Author: 张星
Correspondent Email: zhangx@lnm.imech.ac.cn
DOI: 10.7638/kqdlxxb-2017.0198
Funder: NSFC (11372331) ; NSFC (11772338) ; NSFC (11232011) ; NSFC (11572331)
Subject: 力学 ; 力学::流体力学
CSCD ID: CSCD:6197751
Department: LNM湍流
Classification: 其他
Ranking: 1
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/77428
Appears in Collections:非线性力学国家重点实验室_期刊论文

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description.institution: 1.中国科学院力学研究所
2.中国科学院大学工程科学学院

Recommended Citation:
戴龙珍,张星. 间歇式俯仰转动扑翼的自主推进[J]. 空气动力学学报,2018-02-01,36(1):151-155.
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