Instability mechanisms of symmetry breaking in the wakes of two anti-phase pitching foils at zero free-stream velocity | |
Zhang ZY(张治愚); Zhang X(张星) | |
刊名 | Physics of Fluids |
2024-04-10 | |
卷号 | 36期号:4页码:043610 |
DOI | 10.1063/5.0196194 |
英文摘要 | In the present study, we investigate into the symmetry-breaking phenomenon in the wakes produced by two anti-phase pitching foils at zero free-stream velocity. Numerical simula-tions are performed in a gap ratio range of 0.6 ≤ g ≤ 2.0 and a Reynolds number range of 70 ≤ Re ≤ 200. Six regions are identified in the plane (g, Re), based on distinct symmetry-breaking (or symmetry-preserving) behaviours of the wakes. Floquet stability analysis and dynamic mode decomposition (DMD) are performed on some selected cases. By means of modal analysis, the behaviours of wakes in different regions are rationalized and the instability mechanisms of symmetry breaking in the unstable regions are unveiled. In ad-dition, the influence of symmetry-breaking instability on propulsive performance is also discussed. |
学科主题 | 流体力学 |
分类号 | 一类/力学重要期刊 |
语种 | 英语 |
其他责任者 | Zhang X(张星) |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/94569] |
专题 | 力学研究所_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.The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences; 2.School of Engineering Science, University of Chinese Academy of Sciences |
推荐引用方式 GB/T 7714 | Zhang ZY,Zhang X. Instability mechanisms of symmetry breaking in the wakes of two anti-phase pitching foils at zero free-stream velocity[J]. Physics of Fluids,2024,36(4):043610. |
APA | Zhang ZY,&Zhang X.(2024).Instability mechanisms of symmetry breaking in the wakes of two anti-phase pitching foils at zero free-stream velocity.Physics of Fluids,36(4),043610. |
MLA | Zhang ZY,et al."Instability mechanisms of symmetry breaking in the wakes of two anti-phase pitching foils at zero free-stream velocity".Physics of Fluids 36.4(2024):043610. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论