@inproceedings{oai:jaxa.repo.nii.ac.jp:00038087, author = {磯貝, 紘二 and 山崎, 正秀 and 宇塚, 智 and 齋藤, 拓 and Isogai, Koji and Yamasaki, Masahide and Uzaka, Satoshi and Saito, Taku}, book = {航空宇宙技術研究所特別資料: 航空宇宙数値シミュレーション技術シンポジウム2001論文集, Special Publication of National Aerospace Laboratory: Proceedings of Aerospace Numerical Simulation Symposium 2001}, month = {Jan}, note = {In order to clarify the fundamental mechanism of the hovering flight of a dragonfly, the numerical simulation of unsteady viscous flow around a tandem airfoil configuration oscillating in still air has been conducted by using a two-dimensional Navier-Stokes code. It is shown that the mutual flow interactions between the fore-and hind- airfoils are playing the dominant role in generating the time mean aerodynamic force acting in the direction of the stoke-plane, which is indispensable for the dragonfly to hover with the body axis horizontal. Total amounts of the lifting force and the necessary power are also estimated and shown to be very close to those estimated by other researchers. In order to validate this numerical simulation, the experimental flow visualization around the tandem airfoil configuration has been performed in the water by using the electrolytic precipitation method. It has been shown that the flow patterns obtained are very close to those predicted by the numerical simulation. The total time mean aerodynamic force predicted by the numerical simulation has also been evaluated by using a dragonfly robot machine which can hover in the water, validating that the numerical prediction of the total lifting force is within the error of about 12 percent., 資料番号: AA0032819051, レポート番号: NAL SP-53}, pages = {297--302}, publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)}, title = {昆虫のホバリング飛行の空気力学的メカニズムに関する研究:数値シミュレーションと実験による検証}, volume = {53}, year = {2002} }