Aerodynamics of a translating comb-like plate inspired by a fairyfly wing

Cited 7 time in webofscience Cited 0 time in scopus
  • Hit : 324
  • Download : 0
Unlike the smooth wings of common insects or birds, micro-scale insects such as the fairyfly have a distinctive wing geometry, comprising a frame with several bristles. Motivated by this peculiar wing geometry, we experimentally investigated the flow structure of a translating comb-like wing for a wide range of gap size, angle of attack, and Reynolds number, Re = O(10) - O(10(3)), and the correlation of these parameters with aerodynamic performance. The flow structures of a smooth plate without a gap and a comb-like plate are significantly different at high Reynolds number, while little difference was observed at the low Reynolds number of O(10). At low Reynolds number, shear layers that were generated at the edges of the tooth of the comb-like plate strongly diffuse and eventually block a gap. This gap blockage increases the effective surface area of the plate and alters the formation of leadingedge and trailing-edge vortices. As a result, the comb-like plate generates larger aerodynamic force per unit area than the smooth plate. In addition to a quasi-steady phase after the comb-like plate travels several chords, we also studied a starting phase of the shear layer development when the comb-like plate begins to translate from rest. While a plate with small gap size can generate aerodynamic force at the starting phase as effectively as at the quasi-steady phase, the aerodynamic force drops noticeably for a plate with a large gap because the diffusion of the developing shear layers is not enough to block the gap. Published by AIP Publishing.
Publisher
AMER INST PHYSICS
Issue Date
2017-08
Language
English
Article Type
Article
Keywords

LOW REYNOLDS-NUMBERS; LEADING-EDGE VORTICES; INSECT FLIGHT; FLUID-DYNAMICS; FLAPPING WINGS; FLOW; VORTEX

Citation

PHYSICS OF FLUIDS, v.29, no.8

ISSN
1070-6631
DOI
10.1063/1.4998434
URI
http://hdl.handle.net/10203/226317
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 7 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0