为了获得气体流速分布均匀性对激光器注入能量和输出能量的影响,运用计算流体动力学(CFD)方法对放电区流场进行模拟分析,得到放电区气体流速的纵向分布和竖向分布。根据影响流速分布不均匀性的因素,对整个流场进行优化改进。根据流体动力学原理及激光器结构及其轻量化要求,在原有结构基础上增加3层隔板以改善流场分布特性。优化后,放电区气体平均流速达到99.3 m/s,流速的纵向不均匀度为5.2%,竖向不均匀度为7.1%。激光器的重复频率由300Hz提高到365Hz,单脉冲注入能量由160J提高到171.5J,输出能量由20J提高到21.8J,激光发散角减小了0.5mrad。改善放电区流场分布特性可提高激光器的整体性能。 In order to obtain the influence of the uniformity of gas velocity distribution on laser energy and output energy, CFD method was used to simulate the discharge field flow field to get the longitudinal and vertical distribution of the gas velocity in the discharge zone. According to the factors affecting the non-uniformity of velocity distribution, the whole flow field is optimized and improved. According to the principle of fluid dynamics and laser structure and its lightweight requirements, three layers of separators are added to the original structure to improve the flow field distribution. After optimization, the average discharge velocity of the gas in the discharge zone reached 99.3 m / s, the vertical velocity of flow was 5.2% and the vertical non-uniformity was 7.1%. The repetition frequency of the laser was increased from 300Hz to 365Hz, the energy of single pulse injection was increased from 160J to 171.5J, the output energy was increased from 20J to 21.8J, and the laser divergence angle was reduced by 0.5mrad. Improving the distribution of the discharge field flow field can improve the overall performance of the laser.