昆虫サイズ翼の平面形空力特性

第50回流体力学講演会/第36回航空宇宙数値シミュレーション技術シンポジウム (2018年7月4日-6日. 宮崎市民プラザ), 宮崎市, 宮崎

50th Fluid Dynamics Conference /the 36th Aerospace Numerical Simulation Symposium (July 4-6, 2018. Miyazaki Citizen's Plaza), Miyazaki, Japan

The purpose of this study is to ascertain the aerodynamic characteristics of wings with various planforms having low aspect ratios at Reynolds number of Re is less than or equal to 10,000 which corresponds to an insect wing. The very small forces and moment acting on the wing were measured by using the low pressure wind tunnel assuming the measurement of insect sized wing. The wing models tested in this study are the thin flat plates having rectangular, elliptical, and delta planforms. The lift slope of the wing with large aspect ratio showed constant in the small angle of attack range and changed horizontally as the angle of attack increases. The Reynolds number effects of these wings were comparatively small. As the aspect ratio of the wing decreased, the small lift slope and the large maximum lift coefficient provided by the additional vortex were obtained at Re=10,000. However, the maximum lift coefficient decreased as the Reynolds number decreased to 3000 or less, and the additional vortex lift component was hardly seen in the wings with the specific aspect ratios. As the aspect ratio further decreased, the disappearance of the vortex lift was not observed. The aspect ratio range in which this phenomenon was observed was different in the wing planform. This is one of the unique aerodynamic characteristics of the insect sized wings.

形態: カラー図版あり

Physical characteristics: Original contains color illustrations

資料番号: AA1830029024

レポート番号: JAXA-SP-18-005