摘要
在故障导弹或分离助推器溅落弹道散布过程中,弹体进入全沾湿状态时具有较大的攻角和侧滑角散布范围,弹体流体动力特性具有大攻角非线性特征,空间流体动力特性耦合显著,常规方法难以准确描述。针对轴对称体的特点,提出采用总冲角和相位角概念来描述和解决回转体大攻角流体动力关联仿真问题。然后应用CFD分析获得了柱体在0～180°攻角范围内的非线性流体动力特性,并分析了长细比和重心位置的影响,可供入水弹道仿真参考。
In the splash procedure of failed missiles or detached boosters, the hydrodynamic feature of the axisym- metric bodies is nonlinear at large attack angle scope, and is hard to describe using traditional method. For the axi- symmetric feature of these bodies, a total attack angle and phase angle combination method was presented to describe them. Then, tile hydrodynamic coefficients of a cylinder was acquired by CFD simulating at the attack angles ranging from 0 to 180 degree, and the effects of length-diameter ratio and weight center position on the features were also an- alyzed, which can be referenced by those who design and analyze the water-entry trajectories.
出处
《计算机仿真》
CSCD
北大核心
2012年第11期68-70,121,共4页
Computer Simulation
关键词
回转体
大攻角
非线性
流体动力
弹道仿真
Axisymmetric body
Large attack angle
Nonlinear
Hydrodynamic
Trajectory simulation
