近距耦合式上反与下反V形尾翼气动布局特性研究

针对某无人机所采用的近距耦合式V形尾翼布局,通过求解N-S方程的数值计算方法,得到了上反与下反V形尾翼气动布局的纵向和横航向力矩值.经对比分析表明,上反V形尾翼由于受翼身组合体的遮挡,随着迎角的增加气动效率下降较快;下反V形尾翼主要受翼身组合体的下洗作用,且下洗相对较弱,随着迎角的增加其横向静稳定性减弱,但纵向和航向静稳定性保持得很好.

Investigation of Aerodynamic Characteristics of up VEE Tail and Low VEE Tail

Aimed at the close-coupled vee tail of an UAV, the aerodynamic momental performance of an UAV on up vee tail and low vee tail is calculated by the method of solving N-S equations. The longitudinal, lateral and directional momental performance are compared, and the results show that the pneumatic efficiency of up vee tail declines quickly as the increasing of attack angle because of the downwash and stagnation pressure caused by the wing-fuselage ; the lateral static stability of low vee tail become bad but the longitudinal and directional static stability keep good as the increasing of attack angle because of the less downwash caused by the wing-fuselage.