IMECH-IR  > 非线性力学国家重点实验室
Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow
Zhang X(张翔); He GW(何国威); Wang SZ(王士召); Zhang X(张星)
Corresponding AuthorZhang, Xing(zhangx@lnm.imech.ac.cn)
Source PublicationJOURNAL OF FLUID MECHANICS
2019-11-10
Volume878Pages:113-146
ISSN0022-1120
AbstractWe numerically investigate the passive flight of a flexible Lambda-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.
Keywordflow-structure interactions swimming flying vortex shedding
DOI10.1017/jfm.2019.633
Indexed BySCI ; EI
Language英语
WOS IDWOS:000484506400001
WOS KeywordFLIGHT ; AERODYNAMICS ; FLEXIBILITY ; MECHANISMS ; DYNAMICS ; MOTION ; MODEL
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding ProjectChinese Academy of Sciences[XDB22040104] ; Chinese Academy of Sciences[QYZDJ-SSW-SYS002] ; National Natural Science Foundation of China[11772338] ; National Natural Science Foundation of China[11372331] ; National Natural Science Foundation of China[11232011] ; National Natural Science Foundation of China[11572331] ; Ministry of Science and Technology of China under the 973 Program[2013CB834100]
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China ; Ministry of Science and Technology of China under the 973 Program
Classification一类/力学重要期刊
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79947
Collection非线性力学国家重点实验室
Recommended Citation
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 张翔,何国威,王士召,&张星.(2019).Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow.JOURNAL OF FLUID MECHANICS,878,113-146.
MLA 张翔,et al."Passive hovering of a flexible Lambda-flyer in a vertically oscillating airflow".JOURNAL OF FLUID MECHANICS 878(2019):113-146.
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