Aerodynamic interaction of collective plates in side-by-side arrangement = 나란히 배열된 집단 평판의 공기역학적 상호작용

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In tip-reversal upstrokes of bird flight, primary feathers twist individually, separate from each other, and make gaps between them. Although this behavior was reported to allow individual feathers to function as individual airfoils, lift contribution of each feather in tip-reversal upstrokes and interaction of flow around feathers with gaps still remain unclear. To elucidate aerodynamic characteristics of each feather in tip-reversal upstrokes, we model feathers as collective plates and conduct numerical simulation at Reynolds number ($U_{\infty}t/c$) = 100. The angle of attack of the collective plates $\alpha$ is fixed at 90°, and the gap distance $d/c$ and the angle of attack of each plate $\theta$ are varied. Lift of the plates increases from the bottom plate to the top one. At high angle of attack of each plate, lift coefficient of the collective plates are higher than those of a single plate. The model can be used for micro air vehicle or nano air vehicle in that collective plates can have better aerodynamic performance than that of a single plate in terms of the lift. In addition, this study can give insights into understanding the principles of active flow control using multi-body system for the purpose of enhancing maneuverability.
Advisors
Kim, Daegyoumresearcher김대겸researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2019.2,[iv, 24 p. :]

Keywords

tip-reversal upstroke▼afeather▼acollective plates▼alift▼aaerodynamics; 팁리버설 업스트로크▼a깃털▼a집단 평판▼a양력▼a공기역학

URI
http://hdl.handle.net/10203/265821
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843008&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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