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자료유형
학술대회자료
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대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2018년도 학술대회
발행연도
2018.12
수록면
578 - 581 (4page)

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A fairyfly or thrips, the smallest flying insect ever known, has a distinctive wing geometry so-called bristled wing or comb wing. Its wing consists of a central frame with several bristles expanding from the frame. It is well known that in a low-Reynolds-number environment in which the insect lives, a virtual fluid barrier is formed to block the gaps thanks to the thickly developed shear layers along the bristles. The aerodynamic force generations as well as the corresponding flow structures of a bristled wing in various Reynolds numbers and kinematics have been well organized from the previous studies. However, back to the basics, let us recall that the mutual interaction of the shear layers developed on the surface of each bristle is a fundamental mechanism in determining the performance of the bristled wing. Suppose we construct a bristled wing with a limited number of bristles. If the gap between bristles is narrowed, a sturdy virtual fluid barrier is formed while the total length of the wing is shortened, where the former is aerodynamically favorable but the latter is not. The opposite occurs if the gap between bristles is broaden. We numerically introduce a two-dimensional bristled wing consists of five cylinders, and investigate the optimal configuration of our wing model for the maximized aerodynamic force generation for wide ranges of Reynolds number and gap distance.

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Abstract
1. Introduction
2. Numerical methods
3. Results and discussion
4. Concluding remarks
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