改装苏-80飞机的尾翼抖振研究

Vertical Tail Buffeting Study on the Modification Model Based on Su-80

以苏-80运输机作为研究对象,设想将它改装成预警机,安装三种不同的雷达天线罩后,对其引发的尾翼抖振方面的特性,用弹性模型风洞实验进行对比定性研究。试验结果表明,只有装有圆盘型雷达天线罩的载机模型在0°俯仰角、12°偏航角的飞行姿态下才发生抖振,说明其加装各种雷达天线罩激发抖振的可能性都很小。

Simulating the aircraft Su-80, an early-warning aircraft aeroelastic model is made, with three different kinds of radar-dome carried on aircraft back. The models are tested in a low-speed wind tunnel to investigate the possible buffeting characteristics of the empennage unit due to downstream effect of the radar domes. The result shows the aircraft configured with plate dome occur buffet at 0° pitch angle and 12° yawing angle. The buffeting on vertical tail of Su-80 configured with three types of radar dome Will not occur.