翼身干扰对边条翼翼身组合模型法向力特性影响分析OA北大核心CSTPCD

In order to solve the problem of insufficient lift of strake wing and explore the effect of wing body interference on the lift of strake wing projectile,numerical calculation method was utilized to identify comparison among normal force of strake-wing body combination model,conventional-wing body combination model,only strake-wing model,only conventional-wing model and only body model with angle of attack.The results show that normal force of wing body combination model is greatly increased by wing body interference in subsonic range due to the larger pressure differences between the upper and lower surfaces.It is resulting from the faster velocity caused by larger vorticity in upper surface and the slower velocity caused by block in lower surface.At Ma=0.6 and α=20°,the normal force of its body is increased by 195％,and the average normal force is increased by 46％.At supersonic speeds,due to the small lift of corner vortex in upper surface compared to the strake only model,the wing body interference has a limited lift on normal force of strake.Wing body interference is mostly located on the wings and bodies near the root wings.Strake has a long chord,and affected area is large,so the normal force of strake wing body combined model influenced by wing body interference raises more.