带弹弹舱三维流动数值计算研究

Study on Numerical Calculation of 3D Flow in Missile Bay

采用纳维-斯托克斯(Navier-Stokes)方程数值模拟了Ma=1.5速度下的弹舱空腔流动以及弹舱挂弹后的流动,得到了弹舱底部压力系数、压力脉动功率谱密度等分布图,分析了挂弹前后弹舱内部的流动特性。从计算结果可以看出,弹的存在致使舱内流动与空舱时相比变得更加复杂,表明弹对舱内流动有较大影响,且这样的影响对弹的安全分离不利。因此,在对弹舱流动进行分析时,应充分考虑弹对流动的影响。

Navier-Stokes were adopted to simulate the flow field of the cavity and the missile bay at Ma=1.5. The characteristics of inside the missile bay flow before and after missile were analyzed by the results of the bottom of pressure coefficient and pressure fluctuation power spectral density. The results indicate that the missile bay flow and cavity becomes more complex compared to show that the missile has a great influence on the flow of the cavity, and the effect of safe separation of the flow on the cavity under the analyzed shall take into full account impact on the flow of the missile.