AM05-17-005 CFDによる昆虫羽ばたき飛行でのレイノルズ数Reと無次元周波数kの影響(生物流体・生体流体1,一般講演)

概要

論文の詳細を見る
The unsteady aerodynamics phenomena of insect flight is induced by a lot of factors including the flight speed, wingbeat frequency, wing and body shapes as well as the motion of flapping. The present study is focused on the influence of two parameters, k(reduced frequency) and Re(Reynolds Number), on the production of lift force in flapping flight. To this end, we develop a biology-inspired dynamic flight simulator based on an in-house CFD code and a realistic insect morphology. With the simulator, we carry out computations in hovering flight for different values of the two parameters, e.g. k are 0.125, 0.193 and 0.305, Re are 140, 150 and 6000, respectively. The simulated results show that the smaller the reduced frequency parameter, the lower the lift force is produced during a beating cycle. Moreover, the surrounding wing vortex structure that is of importance in the production of lift force during a hovering flight is found to be sensitive to the variation of the Reynolds numbers.
日本流体力学会の論文
2005-09-05