鸭舵位置参数对弹箭滚转特性的影响

采用数值模拟方法,研究了一尾翼固定的鸭式布局弹箭舵尾间距以及鸭舵安装位置对滚转特性的影响。分析了其流场特性与气动特性,结果显示,固定尾翼鸭式布局弹箭的舵尾间距对滚转控制特性有较大的影响,且舵尾间距越小,鸭舵下洗诱导尾翼产生反向滚转力矩越大,鸭舵滚转控制效率越低; 鸭舵安装位置对滚转特性亦有较大的影响,安装在圆柱段上较安装在圆锥段上,其滚转力矩系数在跨音速得到提升,在亚音速和低超音速都有所下降,超音速时几乎不变。

Effects of Canard Position on Roll Characteristics of Canard-control Projectile

The numerical simulation was conducted to research the influence of the canard-tail-spacing and the position of the canard on roll control characteristics.The flow field characteristics and aerodynamic characteristics were analyzed.The results show that the canard-tail-spacing and the installation position of the canard have great influence on the roll characteristics for the canard-control missile with fixed-tail,and the smaller the spacing is,the greater the rolling moment of the tail induced by downwash is,and the lower the roll control efficiency of the canard is.The installation location of canard also has great influence on characteristics of roll control,and the roll moment coefficient while the canard installed on the cylindrical section is greater than that while the canard installed on the conic section under transonic,and the roll-moment coefficient decreases under subsonic and low supersonic,but the coefficient is almost the same under supersonic.