Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow
文献类型:期刊论文
作者 | Zhang X(张翔)1,2; He GW(何国威)1,2; Wang SZ(王士召)1,2; Zhang X(张星)1,2 |
刊名 | Journal of Fluid Mechanics |
出版日期 | 2019-11-10 |
卷号 | 878页码:113-146 |
ISSN号 | 0022-1120 |
关键词 | Flow–structure Interactions Swimming/flying Vortex Shedding |
DOI | 10.1017/jfm.2019.633 |
英文摘要 | We numerically investigate the passive flight of a flexible Lamda-flyer in a vertically oscillating airflow with zero mean stream. The flexibility of the flyer is introduced by a torsion spring installed at the hinged joint. We study the effects of spring stiffness, density, resting angle and actuation efforts on the hovering performance. The results suggest that the occurrence of resonance in flexible flyers can result in significantly different performances in flexible and rigid flyers. It is found that flexibility can have two opposing effects, reducing or increasing the actuation efforts for hovering, depending on the range of driving frequency. This result is explained by the modulation of relative motion between the flyer and the imposed background flow due to the involvement of passive angular oscillation. The angular oscillation patterns, the wake symmetry properties and the postural stability behaviours under different driving conditions are also explored. Based on the findings of the present study, the ideal parameter values for stable hovering are suggested. The results of this study offer novel insight into the mechanism by which the flexibility of the flyer affects the passive hovering performance. |
学科主题 | 流体力学 |
分类号 | 一类/力学重要期刊 |
URL标识 | 查看原文 |
语种 | 英语 |
WOS记录号 | WOS:000484506400001 |
其他责任者 | 张星 |
源URL | [http://dspace.imech.ac.cn/handle/311007/79256] |
专题 | 力学研究所_非线性力学国家重点实验室 |
作者单位 | 1.中国科学院力学研究所非线性力学国家重点实验室 2.中国科学院大学工程科学学院 |
推荐引用方式 GB/T 7714 | Zhang X,He GW,Wang SZ,et al. Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow[J]. Journal of Fluid Mechanics,2019,878:113-146. |
APA | Zhang X,He GW,Wang SZ,&Zhang X.(2019).Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow.Journal of Fluid Mechanics,878,113-146. |
MLA | Zhang X,et al."Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow".Journal of Fluid Mechanics 878(2019):113-146. |
入库方式: OAI收割
来源:力学研究所
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