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针对机翼弹性变形对前掠翼(FSW)飞行器开裂式方向舵操纵特性的影响,基于计算流体力学/计算结构力学(CFD/CSD)松耦合静气动弹性数值计算方法,计算了亚声速条件下刚性和弹性前掠机翼开裂式方向舵的操纵特性,并分析了机翼弯扭变形对方向舵操纵特性的影响。计算结果表明,右侧开裂式方向舵打开后,与刚性翼相比,弹性翼的失速迎角提前约2°,达到最大升阻比的迎角提前约1°,小迎角时偏航作用增强,出现右滚力矩和滚转力矩“凹坑”现象,大迎角时偏航规律趋势提前约8°,滚转作用加剧;侧滑角增大时,偏航力矩减小的幅度大于刚性翼,滚转力矩完全反效;舵偏角增大时,偏航力矩的增幅小于刚性翼。经比较,在弹性变形影响下,弹性前掠翼的开裂式方向舵操纵特性与刚性前掠翼有明显区别。
In view of the influence of wing elastic deformation on the rupture behavior of the forward-swept wing (FSW) aircraft, based on CFD / CSD loosely coupled numerical simulation of the aerodynamic and elastic properties, the stiffness And the maneuvering characteristics of flexible ruffled wing cracking rudder, and analyzed the effect of wing bending and torsion deformation on rudder steering characteristics. The results show that compared with the rigid wing, the angle of attack of the elastic wing is about 2 ° ahead of the rigid wing, and the angle of attack at the maximum lift-drag ratio is about 1 ° ahead of the rigid wing. The yawing effect is enhanced at the small angle of attack , The phenomenon of right rolling moment and rolling moment “pit ” appears, and the yaw tendency tends to advance by about 8 ° at high attack angle, which aggravates the rolling effect. When the side slip angle increases, the yaw moment decreases more than Rigid wing, roll torque completely reverse; rudder angle increases, the yaw moment increase is less than the rigid wing. By comparison, under the influence of elastic deformation, the cracked rudder steering characteristics of the elastic forward swept wing are obviously different from that of the rigid forward swept wing.