V形尾翼气动布局纵向力矩特性研究

Investigation of Longitudinal Moment Characteristics of Vee Tail

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。

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.