基于Fluent的弹体气动特性计算与分析

Fluent-Based Calculation and Analysis of Missile Aerodynamic Characteristics

应用仿真软件FLUENT,研究了某型号弹体在不同攻角和来流马赫数的工况下的气动特性。湍流模型采用FLUENT中的单方程模型解决壁面限制的流动问题。通过建立几何模型、划分计算区域网格、设置FLUENT中相关参数并进行多次迭代直到收敛,得到弹体对应工况下的升力系数、阻力系数和俯仰力矩系数,对仿真结果进行分析。结果表明,采用FLUENT仿真的方式能够较快地得到弹体的气动参数,为弹道设计提供依据。

The missile’s aerodynamic characteristics on different attack angle and different mach number by FLUENT were analyzed. The single equation model in FLUENT was used to solve the problem of the flow of wall restricted. We obtained the lift coefficient,drag coefficient and pitching moment coefficient of the missile through the establishment of geometric model,dividing calculation area grid,the setup of relevant parameters and several iterations until convergence,and then we analyzed the result. The results show that the aerodynamic parameters of the projectile can be relevantly quickly obtained by FLUENT simulation,which can provide the basis for ballistic design.