为了深入了解高功率轴快流CO2激光器放电管结构和内部流场对激光器工作性能的影响，得到更均匀稳定的辉光放电，采取对放电管内部工作气体的流动状态分别进行数值模拟和实验的方法，得到了关于放电等离子体的流场分布数据，数值模拟结果和实验结果一致，并对不同结构的管内的流场和放电表现进行了比较和分析，设计了一种新结构的放电管。结果表明，放电管内的流场特性影响着辉光放电的均匀性和稳定性，新设计的放电管内能得到更均匀的辉光放电，但还需进一步优化。

In order to grasp the influence of the discharge tube structure on the flow field and working performance of a high power CO2 laser and get a more uniform and stable glow discharge, numerical simulation of the flowing status in discharge tube was done and the computational results matched the experiments results well. The flow fields of different tubes were compared. A new discharge tube structure was designed. The results showed that the flowing field characteristics influenced the uniformity and stability of the glow discharge in tubes. A more uniform flow field and discharge could be got in the new tube needing more optimization.