锤击实验台冲击盘三维流场数值仿真

Numerical Simulation of 3D Flow Field of Rotating Hammering Plate

在锤击实验台控制优化的设计中,引信的性能直接影响到弹丸发射的精确性,通过测试引信性能的锤击实验台高速旋转受到空气阻力的作用,对冲击盘有重要影响,从理论上分析锤击实验台冲击盘的外流场非常重要。通过数值仿真,可以大大缩短冲击盘的改进设计周期,减少研制经费。建立了实验台冲击盘的三维计算模型,采用Navier-Stokes理论、以AN-SYS/FLOTRAN流场计算软件为平台对实验台冲击盘进行了三维流场数值仿真。得到了冲击盘外流场的速度及压力的分布图并对其进行了分析,仿真结果为实验台冲击盘的优化设计和三维旋转物体的流场模拟提供了理论参考。

The launching accuracy of projectile is affected by performance of fuzes. In the experimental process, the impact plate used for testing the performance of the fuze rolling with high speed, was greatly affected by air fric- tion. Theory analysis on flow field of rotating hammering plate is of great significance. The design cycle and cost of plate can be cut down greatly with the support of numerical simulation. A three - dimensional computation model of hammer plate was established. Hammer plate was numerically analyzed by using the software ANSYS/FLOTRAN as platform to solve the three - dimensional Navier - Stokes equations. The distributions of flow velocity and flow pres- sure were obtained, and the analyses of them were carried out. The results provide theoretical references for optimum design of impact plate and flow field of three - dimensional rotating objects.