一维弹道修正弹气动力计算方法和射程修正量分析

Aerodynamic Calculational Method and Range Correction Analysis of One Dimensional Trajectory Correction Projectile

为提高弹箭密集度,采用阻力修正原理进行纵向距离修正是一种低成本的一维弹道修正技术。基于牛顿流理论和风洞实验数据提出了一维弹道修正弹阻力环机构的扩增阻力系数计算方法,通过对不同阻力环结构的气动力数值计算分析,得到阻力环外露高度对扩增阻力系数的影响远大于安装位置等结论。建立了一维弹道修正弹的数学模型,对阻力环机构在飞行弹道上不同位置处作用对应的射程修正量进行了数值计算和炮射试验对比,计算弹道结果和实测弹道结果基本一致。表明提出的一维弹道修正弹阻力环机构的扩增阻力系数计算方法和射程修正量计算数学模型有较高的计算精度,可作为该类弹箭的弹道设计工具。

To improve the Concentration of projectiles, the longitudinal range correction using drag correctional theory is a kind of low-cost one dimensional trajectory correctional technique. Based on the Newton-flow theory and wind tunnel experimental data, a predicting method of additional drag coefficient for drag brake of one dimensional trajectory correctional projectile is established. Aerodynamic performance for different structure of drag brakes was studied by simulations. The results show that the effect on the outer height of drag brake to additional drag coefficient more than setting position. The mathematical model of one dimensional trajectory correctional projectile is finished. Abilities of adjusted trajectory when drag brake acts in different positions on trajectory were studied through the calculations and firing tests. The calculation results of the adjusted trajectory agree well with experiment results. The results show that calculational method of the additional drag coefficient for drag brake and the mathematical model of range correction have higher precision. These methods and the models can be used as tools or fundamentals to design this kind of projectiles.