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就机头微扰动、表面粗糙度、机头顶点形状等因素对战斗机大迎角航向气动特性的影响进行了试验研究。结果表明:大迎角下飞机的航向气动特性对机头表面粗糙度和顶点形状较敏感,不同表面粗糙度和不同机头顶点形状使飞机大迎角下的侧向力和偏航力矩有较大差异,圆头机头对消除和控制飞机在大迎角下的侧向力和偏航力矩效果明显;机头颗粒和顶点细微不对称对大迎角下飞机的航向气动特性微扰动作用明显,使大迎角偏航力矩方向和极值基本确定。
The impact of nose perturbation, surface roughness and nose shape on the aerodynamic characteristics of fighter aircraft at high attack angle were studied. The results show that the aerodynamic characteristics of the aircraft at high angles of attack are sensitive to the nose roughness and the shape of the apex. The different surface roughness and the shape of the apex of the nose lead to more lateral and yaw moments at a high angle of attack The results showed that the effect of the circular nosepiece on eliminating and controlling the lateral and yaw moments of the aircraft at high angles of attack was obvious. The fine asymmetry of the nose particles and the vertex had a significant perturbation on the aerodynamic characteristics of the aircraft at high angle of attack , So that the yaw moment at high angles of attack and the direction of the basic set.