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  Unsteady Aerodynamic Performance of Model Fly Wing

Dickinson, M., & Götz, K. (1992). Unsteady Aerodynamic Performance of Model Fly Wing. American Zoologist, 32(5), 34A.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-1DF3-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000D-1DF8-C
Genre: Meeting Abstract

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https://academic.oup.com/icb/article/32/5/1/125668 (Abstract)
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 Creators:
Dickinson, M1, Author           
Götz, K1, Author           
Affiliations:
1Former Department Neurophysiology of Insect Behavior, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497802              

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 Abstract: The synthesis of a comprehensive theory of insect aerodynamics is hindered by a poor knowledge of unsteady mechanisms. This study presents lift and drag measurements and simultaneous flow visualiza- tion of model Drosophila wings started from rest. Impulsive movement resulted in the production of a leading edge vortex that stayed anached to the wing for the first 2 chord lengths of travel, generating an 80% increase in lift compared to the steady state performance estimated 5 chord lengths later. As the leading edge vortex is shed, lift decays and a vortex of opposite sign develops off the trailing edge, eventually giving rise to a von Karman street behind the wing. It is argued that the transient augmentation is due to the process of detached vortex lift, analogous to the method of force production in delta wing aircraft. This transient increase of aerodynamic performance by unsteady mechanisms is strongly dependent on Reynolds number within the domain relevant for the flight of small flies (30> Re> 300). In contrast, the steady state performance of the models was constant within this same Re range. These results indicate how the unsteady process of vortex generation might be crucial for the production of flight forces in insects.

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 Dates: 1992-10
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1093/icb/32.5.1
 Degree: -

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Title: Annual Meeting of the American Society of Zoologists with the Animal Behavior Society American Microscopical Society, The Canadian Society of Zoologists, The Crustacean Society, The International Association of Astacology
Place of Event: Vancouver, BC, Canada
Start-/End Date: 1992-12-26 - 1992-12-30

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Title: American Zoologist
  Other : Am. Zool.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: McLean, VA : Society for Integrative and Comparative Biology(SI
Pages: - Volume / Issue: 32 (5) Sequence Number: - Start / End Page: 34A Identifier: ISSN: 0003-1569
CoNE: https://pure.mpg.de/cone/journals/resource/111034022289018