可弯折翼尖在飞翼布局中操纵性能研究

Research on the Control Characteristics of the Bendable Wing Tip in Flying-Wing Aircraft

采用经过验证的CFD计算方法,对可弯折翼尖在飞翼布局中的操纵性能进行研究。结果表明,可弯折翼尖是通过侧向力实现横航向操纵的,且进行横航向操纵时对升力、阻力和升阻比的影响都较小。在可弯折翼尖单侧作动时,偏航力矩、侧向力、滚转力矩三者之间存在强烈耦合;在可弯折翼尖两侧反向同步作动时,滚转力矩发生相互抵消,仅侧向力和偏航力矩二者之间存在较强的耦合。可弯折翼尖单侧作动和两侧反向同步作动可形成两种不同的横航向操纵机制。

Using the verified CFD calculation method,this paper studies the control characteristics of the bendable wing tip in the flying-wing. The results show that the bendable wing tip can realize lateral-directional control by the lateral force,and the influence on the lift,the resistance and the lift-drag ratio is very light when controlling the lateral-direction. There is a strong coupling among the yaw moment,the lateral force and the rolling moment when the bendable wing tip is unilateral actuation. The rolling moments counteract themselves when both wing tips are synchronously actuating on the opposite direction. Only the lateral force and the yaw moment have a strong coupling. The unilateral and synchronous actuations to the opposite direction on both sides of the bendable wing tip can form two different lateral-directional control mechanisms.