航空宇宙技術
Online ISSN : 1884-0477
ISSN-L : 1884-0477
 
低レイノルズ数領域において静止状態から急加速するNACA0012翼の非定常空力特性
加瀬 正尭溝口 誠井藤 創
著者情報
ジャーナル 認証あり

2024 年 23 巻 p. 18-26

詳細
抄録

The unsteady aerodynamic characteristics of an impulsively started NACA0012 wing were experimentally investigated in a towing tank at a low Reynolds number of 36000. The flow field variation between rest to steady state was discussed based on the measured lift and pitching moment coefficients. The trend of the time-series variation in the aerodynamic coefficients depends on the angle of attack. The nondimensional towing distance required to steady-state also depends on the angles of attack. The distance required to reach the corresponding steady state is more than ten times the chord length at low angles of attack and large angles above the stall. The measured lift and pitching moment coefficients indicate that the boundary layer attaches on the wing surface at the early stage of the translation below the stall angle. The laminar separation occurs during the acceleration process. The flow field variation from the occurrence of the boundary layer separation to its steady state depends on the angle of attack. The dependence causes different unsteady aerodynamic characteristics compared to those of flat plate wings reported in previous studies.

著者関連情報
© 2024 The Japan Society for Aeronautical and Space Sciences
前の記事 次の記事
feedback
Top