日本航空宇宙学会誌
Online ISSN : 2424-1369
Print ISSN : 0021-4663
ISSN-L : 0021-4663
ロールするデルタ翼の非定常空気力に関する研究
郭 東潤砂田 保人佐藤 淳造
著者情報
ジャーナル フリー

1997 年 45 巻 519 号 p. 222-230

詳細
抄録

Unsteady aerodynamic characteristics of rolling delta wings were investigated by measuring normal forces and rolling moments acting on delta wing models of 14 and 7 degree apex half angles, which are forced to oscillate sinusoidally in roll. The experiment was conducted in a low-speed wind tunnel at several roll frequencies. Vortex breakdown is observed in more limited range of one roll cycle in forced oscillation than in static test, therefore, normal force and restoring rolling moment increase with applying roll oscillation. With increasing the roll rate, energy is supplied from rolling wings to free stream at low angles of attack, but energy is supplied from free stream to rolling wings at higher angle of attack, which will result in wing rock. The effects on wing rock of roll damping, the convective time lag in separated vortex movements and the time lag in vortex breakdown are also discussed in relation to the direction of roll hysteresis curves.

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