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Numerical Study on the Unsteady-Force-Generation Mechanism of Insect Flapping Motion
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Jung-Sang | - |
dc.contributor.author | Kim, Jin-Ho | - |
dc.contributor.author | Kim, Chongam | - |
dc.date.accessioned | 2009-08-11T03:41:37Z | - |
dc.date.available | 2009-08-11T03:41:37Z | - |
dc.date.issued | 2008-07 | - |
dc.identifier.citation | AIAA Journal Vol.46, No.7, pp. 1835-1848 | en |
dc.identifier.issn | 0001-1452 | - |
dc.identifier.uri | https://hdl.handle.net/10371/6907 | - |
dc.description.abstract | Detailed numerical simulations are conducted to investigate aerodynamic characteristics of unsteady-force generation by a two-dimensional flapping motion under a forward-flight condition. A realistic wing trajectory called the figure-eight motion is extracted from a blowflys tethered flight under freestream. Computed results show complex vortical flowfields that exhibit very interesting and distinctive unsteady characteristics. Lift is mainly generated during downstroke motion by a high effective angle of attack due to translational and lagging motion. On the other hand, a large amount of thrust is abruptly generated at the end of upstroke motion. Vortical structure in the wake and the pressure field shows that vortex-pairing and vortex-staying mechanisms can be presented as strong evidence for the abrupt large thrust generation, which is fundamentally different from the inverse Kármán vortex that is used to explain thrust generation by sinusoidal oscillating airfoil. Additional numerical simulations are conducted to examine the effects of motion components of figure-eight motion. From numerical results and comparisons, it is observed that wing rotational motion at the end of upstroke is crucial in generating the pairing and staying of vortices, which eventually leads to the abrupt thrust generation. | en |
dc.description.sponsorship | This work was supported by the Brain Korea 21 Project and by
grant R01-2005-000-10059-0 from the Basic Research Program of the Korea Science and Engineering Foundation. The authors also gratefully acknowledge the financial support of the Agency for Defense Development and by the Flight Vehicle Research Center (FVRC), Seoul National University. | en |
dc.language.iso | en | en |
dc.publisher | American Institute of Aeronautics and Astronautics | en |
dc.title | Numerical Study on the Unsteady-Force-Generation Mechanism of Insect Flapping Motion | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 이정상 | - |
dc.contributor.AlternativeAuthor | 김진호 | - |
dc.contributor.AlternativeAuthor | 김종암 | - |
dc.identifier.doi | 10.2514/1.35646 | - |
dc.citation.journaltitle | AIAA Journal | - |
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