【摘要】 针对不同弹道高度的气象不同引起雷诺数不同,进而导致阻力系数不准确的问题,提出了基于高度的阻力系数实时修正方法。该方法通过空气动力计算软件获取到同一马赫数不同高度气象条件对应的弹丸阻力系数变化量与高度的对应关系,在弹道解算中,采用弹丸实际弹道高度插值该关系,实现了弹丸阻力系数的实时修正。155 mm榴弹底排弹最大射程角验证结果表明,4 500 m海拔时,高度修正的阻力系数对弹丸的射距和横偏影响可达2%,从弹道顶点时刻开始弹丸落点预测,采用修正后的阻力系数较采用地面阻力系数的落点预测精度约提高了一倍。更多还原

【Abstract】 In response to different meteorological conditions with different trajectory altitude, the Reynolds number is different, which leads to the inaccuracy of the drag coefficient, a method of drag coefficient real-time correction based on trajectory altitude is proposed. The method obtains the projectile resistance system corresponding to the height meteorological condition of the same Mach number through aerodynamic calculation software. The relationship between the drag coefficient of change and the height of the projectile is calculated, the actual trajectory altitude is used to modify the the drag coefficient. The result of function and experiment indicates that at height of 4500 m altitude, the altitude correction of the drag coefficient affects the down range and cross range. The effect can reach 2%; From the point of the trajectory peak, the impact point prediction accuracy using the modified drag coefficient is better than using the ground drag coefficient, the degree has about doubled.更多还原