旋转稳定二维修正弹鸭舵法向力计算模型研究

Calculation Model of Normal Force of Canard on Spin Stabilized Two-dimensional Trajectory Correction Projectile

为了研究修正组件滚转条件下二维修正弹鸭舵的法向气动力非线性规律,建立了鸭舵坐标系,考虑弹丸攻角、舵偏角、弹丸运动和迎风区与背风区等影响因素,采用多元泰勒展开理论,建立了动态鸭舵法向力计算模型;采用数值计算分析了不同攻角、舵偏角组合的鸭舵法向力特性,得到了不同舵偏角下鸭舵法向力随攻角的变化规律,分析了滚转条件下舵偏角和攻角对4个鸭舵法向力系数的影响规律。结果表明:鸭舵法向力计算模型的计算结果与数值计算结果吻合较好,该模型为二维修正弹的气动力计算提供了参考。

In order to study the rule of normal aerodynamic force of the canard on two-dimensional correction projectile with rolling course correction fuzes(CCF),the coordinate system of the canard was established. Considering the factors such as the angle of attack(AOA),the canard deflection,the motion of the projectile,and the windward and leeward regions,the normal force calculation model of dynamic canard was established by using the multi-element Taylor expansion theory. The change rule of canard normal force at different attack angles and canard deflections was analyzed by numerical calculation. The rules of influence of attack angle and canard deflection on the aerodynamic coefficients of four canards were analyzed when the CCF was rolling. The results show that the calculation model results are in good agreement with numerical calculation results of the canard normal-force. The model offers reference for the aerodynamic force calculation of two-dimensional corrected projectile.