大流量轴快流CO2激光器放电管的对比分析

为了提高大功率轴快流CO2激光器的单根放电管的质量流量,得到更大的单根放电管的输出功率,对原有放电管的喷嘴、绕流环等结构进行了改进和优化,设计出一种新型的大质量流量放电管。采用数值模拟和实验验证的方法对新设计的放电管内的气体流动状态和输出功率进行分析,得到了工作气体的质量流量,放电管的输出功率以及工作气体在放电管内的流场分布,数值模拟结果和实验结果一致,并对不同结构的放电管的输出功率和流场分布进行了比较。结果表明,新设计的放电管的质量流量明显增加,单根放电管的输出功率提高,且能够得到均匀的辉光放电。

Comparative analysis of discharge tube of CO2 lasers with large mass flow rate and fast-axial flow

In order to improve the mass flow rate of a single discharge tube to get higher output power, a new discharge tube was designed after optimization of nozzle and loop structure of the original tube. The flow field, the output power and the mass flow rate of the discharge tube were analyzed through numerical simulation and measured in experiments. The computational results were consistent with the experimental results well. The flow field and the output power of different structure of discharge tubes were compared. The results show that the mass flow rate of the newly designed discharge tube is larger, the output power of single discharge tube is higher and the glow discharge is uniform.