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为了解决低腔压大功率气体激光器传统固体输出窗口的热吸收问题,多采用自由旋涡气动窗口替代传统固体输出镜的方法。通常,自由旋涡气动窗口的设计采用无粘特征线方法结合经验修正,扩压段的设计采用理论分析结合经验的方法。基于对气动窗口整个流场的数值模拟来设计气动窗口的研究还不太完善,利用超声速自由旋涡流动结构并结合数值模拟的方法,设计了自由旋涡气动窗口,用数值模拟的方法得到了较理想的扩压段宽度和位置,最后对气动窗口全流场进行了模拟,结果表明自由旋涡气动窗口的设计是可行的。
In order to solve the problem of heat absorption in the traditional solid output window of low cavity pressure high power gas lasers, the method of replacing the traditional solid output mirror with a free vortex pneumatic window is mostly adopted. In general, the design of the free-vortex aerodynamic window is modified by the non-stick characteristic line method combined with the experience. The design of the diffuser section is based on a combination of theoretical analysis with empirical methods. Based on the numerical simulation of the entire flow field of the aerodynamic window, the design of the aerodynamic window is not perfect. By using the supersonic free vortex flow structure and the numerical simulation method, the free vortex aerodynamic window is designed. The numerical simulation method is more ideal The results show that the design of free vortex aerodynamic window is feasible.