二维弹道修正弹气动力特性的研究是求解二维弹道修正弹弹道、分析二维弹道修正弹飞行稳定的基础,是实现精准控制、减小散布必要的理论支撑。该文对二维弹道修正弹的力学特性进行了分析,采用弹翼组合体气动特性工程计算方法,建立二维弹道修正弹气动计算模型,对二维弹道修正弹的升力和阻力进行计算。计算结果与CFD仿真结果对比,误差均小于10%,模型具有较好的可靠性。采用遗传算法,结合二维弹道修正弹气动计算模型,分析了舵偏角和滚转角对二维弹道修正弹升阻比的影响。结果表明,舵偏角越小,全弹的最优升阻比越大,最佳攻角越大,气动能力越好。当攻角大于10°且滚转角为180°时,全弹具有更好的气动能力。
Abstract
The research on the aerodynamic characteristics of the two-dimensional trajectory correction projectile is the foundation of solving the trajectory of the two-dimensional trajectory correction projectile and analyzing the flight stability of the two-dimensional trajectory correction projectile,and it is the theoretical support to achieve precise control and reduce dispersion. The mechanical characteristics of two-dimensional trajectory correction projectile were analyzed,and the engineering calculation method of the aerodynamic characteristics of the wing assembly was adopted. The aerodynamic calculation model of two-dimensional trajectory correction projectile was established,and the lift force and drag force of two-dimensional trajectory correction projectile were calculated. Comparing the calculated results with the CFD simulation results,the error is less than 10%,and the model has good reliability. Combined with aerodynamic calculation model of two-dimensional trajectory correction projectile,the influence of rudder deflection angle and roll angle on the lift-drag ratio of two-dimensional trajectory correction projectile was analyzed by using genetic algorithm. The results show that the smaller the rudder deflection angle,the greater the optimal lift-to-drag ratio of the whole projectile,the greater the optimal angle of attack,and the better the aerodynamic capability. When the angle of attack is greater than 10° and the roll angle is 180°,the full projectile has better aerodynamic capabilities.
关键词
二维弹道修正弹 /
气动特性 /
工程算法 /
遗传算法
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Key words
two-dimensional trajectory correction projectile /
aerodynamic characteristics /
engineering algorithm /
genetic algorithm
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