为增大某37mm口径人工防雹增雨炮弹最大射高,在原榴-1引信外形基础上提出了4种外形优化方案,利用Flunet软件对配用这5种方案引信的弹丸阻力系数进行仿真,并将所得数据拟合成有理式函数,再进行其质心外弹道计算,得到各方案最大射高。引信头部外形以抛物面方案减阻增高效果最佳(增高约4%)。通过弹体和引信改进设计将弹重由现0.70kg增大到原军用制式弹的0.732kg,最大射高还会增大约3%。

In order to increase the maximum firing height of a 37 mm caliber artificial hail-suppression and rainfall projectile, the other 4 kinds of contour optimization schemes were put forward on the basis of the contour of origin Liu-1 fuze, drag coefficients of projectiles equipped with these 5 schemes of fuze were simulated by using Flunet, and the data obtained would be fit to rational functions, then the centroid trajectory was calculated and the maximum firing height of each scheme was obtained.The fuze head contour has the best effect with the parabolic scheme in reducing drag and increasing height (increasing by about 4%).It increases the mass of projectile from the current 0.70 kg to 0.732 kg of the military standard projectile by the improved design of projectile and fuze, the maximum firing height will increase by about 3%.