摘要
在弹丸弹道修正问题的研究中,弹丸外流场参数是其设计研制乃至应用分析阶段必须重视的空气动力学问题。同时弹丸外流场参数反映了弹丸的飞行状态,可作为引信解除保险的环境信息。然而在有些弹丸外形设计过程中往往只去仿制成熟弹丸外形,缺少弹丸外弹道外流场参数,造成计算精度差。为此。借助于商业CFD软件FLUENT,对某型弹丸在不同攻角、不同飞行马赫数的气动力进行了计算,得出了该型弹丸升力系数、阻力系数和俯仰力矩系数随飞行马赫数和攻角的变化规律以及弹丸表面的压力分布、温度分布和来流速度分布,为相关研究提供了重要的外流场参数。并对各参数变化对比研究,得出可利用这种外流场参数随弹道位置变化规律作为引信解除保险信息或弹道修正信息的结论。
The flow field parameter of projectile is the important problem we must pay attention to in the process of design and application. The flow field parameter of projectile response flight states of projectile, which can be used as environment information of arming of fuze. But sometimes in the design process of figure of projectile, they just copy mature figure of projectile, so there is a lack of the flow field parameter of projectile. Simulation research on the char- acteristics of projectile external flow in different angle of attack and different mach number based fluent, educes lift coefficient and drag coefficient change regularity and pressure distributing, temperature distributing, and velocity dis- tributing, and offers external flow parameter for co relational study. Contrast research about the parameters change show that the change rule of flow field parameters can be used as information for fuze safety and arming, or for trajec- tory correction.
出处
《计算机仿真》
CSCD
北大核心
2014年第3期38-40,45,共4页
Computer Simulation
关键词
弹丸
引信
外流场
仿真
Projectile
Fuze
external flow
Simulation