Large-amplitude unsteady motion effects on the aerodynamic force and stability characteristics of flat-plate wings were investigated in a wind tunnel for the cases of two delta wings with respective leading edge sweeps of 70 and 45 deg, and a rectangular wing whose aspect ratio was equal to that of the 70-deg delta wing. Attention was given to the effects of reduced frequency and mean angle of attack. It is found that lags in vortex burst location and separation/reattachment of flow on the upper surface of the wing produced large overshoots and hysteresis loops in normal force and pitching moment coefficients that were a strong function of mean oscillation angle and reduced frequency.
Effect of large amplitude pitching motions on the unsteady aerodynamic characteristics of flat-plate wings
AIAA Atmospheric Flight Mechanics Conference ; 1988 ; Minneapolis, MN, United States
1988-01-01
Conference paper
No indication
English
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