机动襟翼的气动特性

 机动襟翼是现代战斗机提高机动格斗能力的常用措施。本文根据风洞实验结果,讨论了机动襟翼减阻的能力和原因,襟翼弦长和展长的影响,前缘襟翼和后缘襟翼的配合使用问题,机翼边条和机翼平面形状对机动襟翼减阻的影响,以及机动襟翼对大迎角飞行品质的改善情况。讨论表明,机动襟翼是提高战斗机空战格斗能力的有效措施。它能控制气流分离和减小大迎角时的阻力,提高抖振边界和降低抖振强度,改善大迎角的飞行品质。为了得到最佳的综合效果,机动襟翼的参数选择必须考虑对飞机结构和系统的影响。

AERODYNAMIC CHARACTERISTICS OF MANEUVERING FLAPS

Many of the current fighter aircraft use maneuvering flaps to enhance air combat maneuverability. Based on wind tunnel tests, this paper deals with the ability and causes of maneuvering flaps to decrease drags, the effects of the flap span, the flap chord, the strake and the wing plane form on the aerodynamic characteristics of the maneuvering flap, the matching of leading-edge and tailing-edge flaps, the improvement in the large angle-of-attack flying quality. This study shows that maneuvering flap is an effective measure to improve air combat capability of fighter aircraft at large angles of attack. Maneuvering flaps can effectively control the flow Separation and decrease the drag at large angles of attack. They also can expand the buffet boundary and decrease the buffet intensity. As a result, the large angle-of-attack flying quality can be significantly improved by utilization of maneuvering flaps. To the end of optimum comprehensive effect, the effects on both the aircraft structure and the system must be taken into account during the choice of the parameters of maneuvering flaps.