中国科学院力学研究所机构知识库
Advanced  
IMECH-IR  > 非线性力学国家重点实验室  > 期刊论文
Title:
Numerical study on hydrodynamic effect of flexibility in a self-propelled plunging foil
Author: Zhu XJ(朱晓珏); He GW(何国威); Zhang X(张星)
Source: Computers & Fluids
Issued Date: 2014-05
Volume: 97, Pages:1-20
Abstract: The present study is a numerical investigation of the hydrodynamic effects of passive flexibility ona selfpropelled plunging foil. In the model problem, the flow is two-dimensional, incompressible and laminar, while the flexible foil is treated as an inextensible filament. The leading-edge of the foil undergoes a prescribed harmonic oscillation in the vertical direction. Inthe horizontal direction, the foil is free to move and no constraint is imposed. The simulations are performed by using a solver which couples the immersed boundary method for the flow and the finite difference method for the structure. A systematic parametric study has been conducted to investigate the effects of flexibility on important physical quantities such as the cruising speed, swimmingpower and propulsive efficiency. It is found that optimal cruising speed is always achieved in foilswith some passive flexibility and not the rigid ones. Another important finding is that optimum performance is always achieved at a forcing frequencymuch lower than the resonance point. Based on the simulation results, three dynamical states of a self-propelled foil have been identified with the increase of bending rigidity, i.e., non-periodic movement, periodic backward-movement and periodic forward-movement. For a flexible foil in forward movement, depending on the range of bending rigidity, either a deflected or a symmetric vortex street arises as the characteristic wake structure. It is found that moderate flexibility is beneficial to symmetry preservation in the wake, while excessive flexibility can trigger symmetry-breaking. The results obtained in the current work shed some light onthe role of flexibility in flapping-based biolocomotion.
Keyword: Fluid–structure interaction ; Passive flexibility ; Self-propulsion ; Plunging foil ; Immersed boundary method ; Vortex street
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: 张星
Correspondent Email: zhangx@lnm.imech.ac.cn
Related URLs: 查看原文
DOC Type: Article
WOS ID: WOS:000337200500001
ISSN: 0045-7930
Subject: 流体力学
Department: LNM湍流
Classification: 二类/Q2
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/48738
Appears in Collections:非线性力学国家重点实验室_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Zhu_He_Zhang_CAF2014.pdf(4796KB)----开放获取View Download

Recommended Citation:
Zhu XJ,He GW,Zhang X. Numerical study on hydrodynamic effect of flexibility in a self-propelled plunging foil[J]. Computers & Fluids,2014-05-01,97:1-20.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[朱晓珏]'s Articles
[何国威]'s Articles
[张星]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[朱晓珏]‘s Articles
[何国威]‘s Articles
[张星]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Zhu_He_Zhang_CAF2014.pdf
格式: Adobe PDF
此文件暂不支持浏览
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院力学研究所 - Feedback
Powered by CSpace