基于 CFD 尾翼稳定可控枪弹气动特性分析

摘要

为了优化可控枪弹结构，对可控枪弹整体结构进行简化处理，用三维软件SolidWorks布尔运算建立数值仿真模型，ICEM CFD生成非结构网格，通过Fluent对可控枪弹外流场数值仿真，得出不同马赫数不同攻角下阻力系数、升力系数、俯仰力矩系数以及压力中心系数变化规律。结果表明，可控枪弹气动特性处于静态稳定临界点，与试验结果相符，需要通过改变弹丸质心或者外形结构以优化结构。%To optimize bullet design , Solidworks was used to simplify overall structure of bullet and establish numerical simulation with Boolean operation , ICEM CFD generated mesh of this model , and simulation was performed by Fluent for outer flow field to obtain drag co-efficient, life coefficient, pitching moment coefficient and center of pressure coefficient at different angles and different Mach number .The result shows that the aerodynamic characteristics of a controlled bullet are in critical point for statically stable , which is consistent with the test results, so it is need to optimize the structure by changing the shape or structure of the projectile centroid .