利用展向吹气控制机翼上的“迟滞环”(英文)  

AN EXPERIMENTAL INVESTIGATION OF IMPROVING UNSTEADY AERODYNAMIC CHARACTERISTICS FOR A WING BODY COMBINATION IN PITCHING OSCILLATION BY SPANWISE BLOWING

作　　者：秦燕华[1,2] 庄逢甘[1,2] 

机构地区：[1]北京航空航天大学流体力学研究所 [2]中国空气动力研究与发展中心

出　　处：《流体力学实验与测量》1998年第3期39-47,共9页Experiments and Measurements in Fluid Mechanics

摘　　要：本文给出了利用展向吹气控制飞行器正弦俯仰振荡的气动力迟滞环。模型为６０°三角翼翼－身组合体；俯仰振荡的减缩频率为０．０３９和０．０７８，实验迎角范围为０°～６０°。实验研究包括流态显示和气动力测量。结果表明展向吹气可以明显改善飞行器动态运动中的气动力迟滞特性，使上仰和下俯过程中气动力的差异显著减小，即减小了“迟滞环”的宽度。A test setup for the determining of aerodynamic characteristics in pitching oscillation with spanwise blowing and relevant testing technique have been developed recently.Some experimental investigations for a 60 deg delta wing body combination to explore the effects of spanwise blowing on the hysteresis characteristics have been conducted in the China Aerodynamics and Research Development Center (CARDC) 3.2m diameter subsonic wind tunnel for the force measurements and 1.28m×0.78m low speed wind tunnel in Nanjing University of Aeronautics and Astronautics (NUAA) for the flow visualization with the reduce frequency from 0.01 to 0.078 and amplitude of 20 deg at the mean angle of attack of 20 ,30 and 40 deg,respectively. The results indicated that the spanwise blowing (SWB) over the wing could improve the vortex flow significantly and reduce the differences between the flow patterns at the same angles of attack in upstroke and downstroke,and hence improve the hysteresis of aerodynamic characteristics.

关 键 词：非定常气动力 展向吹气 涡控制 机翼 气动力 

分 类 号：V211.41[航空宇航科学与技术—航空宇航推进理论与工程]