V形尾翼气动布局纵向力矩特性研究

针对某无人战斗机所采用的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力矩值。对比分析结果表明,上反V形尾翼由于受翼身组合体产生的下洗和速度阻滞作用,随着迎角的增加力矩曲线有上翘现象,但随着马赫数的增加而减弱;下反V形尾翼布局力矩曲线的线性度良好。

Investigation of Longitudinal Moment Characteristics of Vee Tail

Aimed at the vee tail of an UCAV,the longitudinal moments of up vee tail and down vee tail are calculated by the method of solving N-S equations.The investigations show that,because of the downwash and stagnation pressure caused by the wing-fuselage,the longitudinal moment curve of up vee tail becomes up warped as the increasing of attack angle,but the warp weakened as the increasing of Ma;The linearity of the longitudinal moment curve of low tail is good.