为了研究伞形阻力器一维弹道修正弹的气动特性,在标准82mm口径迫击炮弹上加装伞形阻力器,建立一维修正弹模型。利用流体计算软件Fluent对亚音速飞行时弹丸模型进行了数值仿真。结果表明,阻力伞的展开破坏了弹体头部的流线形结构,改变了弹丸的气动布局,使得弹丸所受阻力增大。阻力伞展开前后阻力系数比可达到2.3左右。研究结果可以为一维弹道修正弹的研究提供帮助。

In order to study aerodynamic characteristics of one-dimensional trajectory correction umbrella resistance device, a ballistic correction projectile model with umbrella resistance on standard 82 mm mortars was established in the paper. Then, the numerical simulation against the model in the subsonic case was implemented by the computational fluid dynamics software Fluent. The result shows that expansion of the resistance umbrella structure destroys streamline structure of warhead, and changes aerodynamic layout of projectile, making the resistance is bigger. The resistance coefficient ratio reaches about 2.3 before and after resistance umbrella opening. The result could help to research on one-dimensional trajectory correction projectile.