https://scholars.lib.ntu.edu.tw/handle/123456789/634125
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.author | CHANG, S.K. | en_US |
dc.contributor.author | Lin, You Jun | en_US |
dc.contributor.author | KUAN-LUN HSU | en_US |
dc.contributor.author | JING-TANG YANG | en_US |
dc.date.accessioned | 2023-07-24T07:01:27Z | - |
dc.date.available | 2023-07-24T07:01:27Z | - |
dc.date.issued | 2023-06-01 | - |
dc.identifier.issn | 24700045 | - |
dc.identifier.uri | https://scholars.lib.ntu.edu.tw/handle/123456789/634125 | - |
dc.description.abstract | The effect of wing shape on a forward-flying butterfly via decoupled factors of the wing-swept angle and the aspect ratio (AR) was investigated numerically. The wing-shape effect is a major concern in the design of a microaerial vehicle (MAV). In nature, the wing of a butterfly consists of partially overlapping forewing and hindwing; when the forewing sweeps forward or backward relative to the hindwing, the wing-swept angle and the AR of the entire wing simultaneously change. The effects of the wing-swept angle and AR on aerodynamics are coupled. To decouple their effects, we established wing-shape models with varied combinations of the wing-swept angle and AR based on the experimental measurement of two butterfly species (Papilio polytes and Kallima inachus) and developed a numerical simulation for analysis. In each model, the forewing and hindwing overlapped partially, constructing a single wing. Across the models, the wing-swept angle and AR of these single wings varied sequentially. The results show that, through our models, the effects of the wing-swept angle and AR were decoupled; both have distinct flow mechanisms and aerodynamic force trends and are consistent in the two butterfly species. For a fixed AR, a backward-swept wing increases lift and drag because of the enhanced attachment of the leading-edge vortex with increased strength of the wingtip vortex and the spanwise flow. For a fixed wing-swept angle, a small AR wing increases lift and decreases drag because of the large region of low pressure downstream and the wake-capture effect. Coupling these effects, the largest lift-to-drag ratio occurs for a forward-swept wing with the smallest AR. These results indicate that, in a flapping forward flight, sweeping a forewing forward relative to a hindwing is suitable for cruising. The flow mechanisms and decoupled and coupled effects of the wing-swept angle and the AR presented in this paper provide insight into the flight of a butterfly and the design of a MAV. | en_US |
dc.language.iso | en | en_US |
dc.relation.ispartof | Physical Review E | en_US |
dc.title | Decoupling wing-shape effects of wing-swept angle and aspect ratio on a forward-flying butterfly | en_US |
dc.type | journal article | en |
dc.identifier.doi | 10.1103/PhysRevE.107.065105 | - |
dc.identifier.pmid | 37464647 | - |
dc.identifier.scopus | 2-s2.0-85163978779 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85163978779 | - |
dc.relation.journalvolume | 107 | en_US |
dc.relation.journalissue | 6 | en_US |
item.fulltext | no fulltext | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.grantfulltext | none | - |
item.openairetype | journal article | - |
item.languageiso639-1 | en | - |
crisitem.author.dept | Mechanical Engineering | - |
crisitem.author.orcid | 0000-0002-9810-9295 | - |
crisitem.author.parentorg | College of Engineering | - |
顯示於: | 機械工程學系 |
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