三维内埋式弹舱流动特性及形状影响数值分析

Numerical analysis of flow characteristics and shape effect of three dimensional internal weapons bay

采用多块结构化网格生成方法,基于三维雷诺平均N-S方程和SST k-ω湍流模型,模拟了三维内埋式弹舱的流动特性。通过改变弹舱各壁面的倾角及宽深比,分析其对弹舱流动特性的影响,并研究了前缘锯齿对气动特性的影响。计算结果表明,在适当范围内:增大弹舱后壁倾角、减小侧壁倾角、增大宽深比可以改善弹舱流动特性;舱门前缘增加锯齿,有明显的减阻效果。

In this paper,multi-block structured mesh generation is utilized,with three-dimensional Reynolds-averaged N-S equation and SST k-ω turbulence model to calculate the flow characteristics of three-dimensional internal weapons bay.The effect of weapons bay on flow characteristics is researched,by changing crucial parameters,such as angle of different walls,ratio of width to depth.The effect of leading edge sawtooth on aerodynamic characteristics is also studied.The results show that flow characteristics of weapons bay is improved,when the angle of rear walls increases,the angle of side walls decreases,and the ratio of width to depth increases in appropriate range.The installation of leading edge sawtooth on weapons bay can reduce the resistance significantly.