为了解决弹射座椅研究中风洞试验不足和气动参数缺乏的问题，尝试了采用计算流体力学（CFD） 方法，利用CFD计算软件Fluent求解N－S方程，对弹射座椅的外流场进行数值计算，求得了弹射座椅不同姿态 下的气动参数值，并将部分气动参数与风洞试验的测量值进行了对比，结果发现，计算结果与试验值的变化趋 势完全相同，大多数计算值与试验值的误差都在１０％以内，能够满足工程计算的需要，可以作为试验值的补充 和替代。通过CFD方法在弹射座椅气动参数计算中的应用，可以看到CFD方法在弹射座椅的研究中有着广阔的 应用前景。

  The traditional method for obtaining aerodynamics coefficient for ejection seat is wind tunnel experiment. To research the feasibility of the application of computational aerodynamics coefficient for ejection seat on general CFD software,  aerodynamics coefficient of ejection seat was computed using general CFD software. Through resolving fluid field,  the result is obtained.  The average difference of the result compared with the experiment data is less than 10 % and in the range of permission. It shows that CFD methodologies can be used instead of wind tunnel experiment for the ejection seat research.  CFD methodologies can be applied widely to ejection seat research.