2 0 0 0 OA 効率的大域探索法に基づく主翼上面ボルテックスジェネレータ最適配置
- 著者
- 小堺 孝和 加藤 裕之 中北 和之 金崎 雅博
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 (ISSN:21879761)
- 巻号頁・発行日
- pp.15-00188, (Released:2015-08-20)
- 参考文献数
- 13
- 被引用文献数
- 1 1
The “buffet” which is the shock wave vibration on the wing at transonic speed has influence to the aerodynamic performance of the civil transport. It is significant because the wing cannot maintain its aerodynamic performance and it is also led to the stall. Therefore, several researches on the suppression of the buffet are carried out. A Vortex Generator (VG) is one of the way which can improve to the transonic buffet. It is simple device and widely applied to the commercial airplane. Conventionally, VGs are installed along the wing span. However, they increase the friction and the instruction drag. Thus, the number of VGs should not be beyond the minimum necessary. Another problem is that it is still expensive for the computational fluid dynamics to simulate the small size vortex accurately. Therefore, the optimization procedure of the VGs installation is developed with directly combining the wind tunnel evaluation result. To reduce the number of experimentations, the surrogate model based GA exploration is employed. The design objective is to maintain the linearity of the variation lift with changing angle of attack (lift curve), because the stall is appeared if the curvature of the lift curves become smaller. Eight initial designs are evaluated and five design samples are acquired. As this result, optimum samples can be explored with reducing the number of the experiment. Several samples successfully prevent the stall without increasing the drag. In addition, the design knowledge can be obtained regarding the optimum VG’s layout by visualization.
1 0 0 0 OA 仮想飛行試験の実現に向けた次世代動的風洞実験の基盤構築
本研究は,航空機の非線形領域における動安定性を調べる実験技術として,ハイブリッド・アプローチによる次世代動的風洞試験法を開発することを目的としている.従来のシリアルロボットに加えて,新規にHEXA型パラレルロボットとその制御系を開発し,それらを用いて縦運動と横運動が連成する2自由度の加振実験を実施した.これと並行して,非定常感圧塗料や蛍光ミニタフトなどの先進的な光学計測手法を開発し,非定常運動するデルタ翼面上の前縁剥離渦の崩壊や空気力への周波数の影響を実験で明らかにした.これら一連の実験により,非線形飛行力学の研究を行うための基盤技術を構築することができた.