Herbst机动中的摇滚运动试验研究

Test study on wing rock in Herbst maneuver

为了研究新型战斗机布局在Herbst机动中的非指令摇滚运动问题,研制了模拟Herbst机动运动的风洞试验装置,发展了运动/流动同步测量技术;借助试验装置,研究了尖侧缘机身布局在Herbst机动中的摇滚运动形态,找到了摇滚运动产生的主要阶段,分析了运动参数对摇滚运动的影响规律。结果表明:Herbst机动中的摇滚运动主要来自于俯仰拉起阶段,圆锥运动阶段对摇滚运动基本没有影响;在俯仰拉起阶段,摇滚运动随拉起速度可分为准静态区、过渡区和类正弦区;在快速拉起的类正弦区,当拉起减缩频率为0.01时,拉起中的摇滚运动曲线在俯仰角50°之前基本重合,在俯仰角50°之后较为分散,在一定的俯仰角范围内,拉起减缩频率可作为尖侧缘机身布局拉起摇滚运动的无量纲参数。

A wind tunnel device simulating Herbst maneuver and the related motion/flow synchronous measurement technology are developed.By the device,the roll oscillation of the chined-body configuration undergoing the Herbst maneuver is studied.The device is used to study the roll oscillation of the chined-body configuration during the Herbst maneuver.The main stage form the rolling motion is revealed and the influence of motion parameters on the rolling motion is analyzed.Results show that the roll oscillation in the Herbst maneuver mainly comes from the pitch-up stage,and the conical motion stage has little effect on the rolling motion.In the pitch-up stage,the rolling motion can be divided into the quasi-static region,transition region and sine-like region.As the reduced pitch rate is 0.01,the curves of the rolling motions undergoing pitch up coincide each other before the pitch angle of 50°,and after that pitch angle the curves are dispersed.The reduced pitch rate can be used as a dimensionless parameter for the rolling motion of the chined-forebody configuration undergoing pitch up within a certain range of pitch angle.The rolling motion of the chined-forebody configuration undergoing pitch up within a specific range of pitch angle can be described by the reduced pitch rate,which can be employed as a dimensionless parameter.