自由旋气动窗口设计原理及其工作性能的初步实验研究

Design Principle of the Free-vortex Aerodynamic Window and an Experimental Study on Its Running Properties

论述了自由旋气动窗口（ＦＡＤＷ ）的基本工作原理，并对为万瓦级ＣＯ２ 气动激光器配置的３０ ｍ ｍ ×３０ ｍ ｍ 大口径自由旋气动窗口的工作性能进行了实验研究。研究表明，此气动窗口在其工作范围内，密封压比ＰＲ（环境大气压ＰＡＭＢ／密封腔压ＰＣ）＞ ２０， 最大可达到２８；而且该气动窗口具有良好的启动性能和对光束质量影响小的特点。因此对于大口径、低腔压的大功率气体激光器来说，自由旋气动窗口是替代输出镜最有效的手段之一。

The principle of the free vortex aerodynamic window (FADW) is described. The sealing property and influence of a FADW device designed for the 10 kW CO 2 gas dynamic laser (GDL) on the optical quality have been studied experimentally. The experimental results show that this FADW device can attain a high sealing pressure ratio P R>20, with the highest being 28 under the designing conditions, and that the FADW has a good starting property and little influence on the optical quality. So this kind of free vortex aerodynamic window is a promising alternative to take the place of the crystal windows.