高功率激光装置中传输镜表面颗粒物去除轨迹的数值模拟

Numerical Simulation of Debris Removal Trajectories on Transport Mirrors in High Power Laser System

利用Fluent软件,以N-S方程和RNGκ-ε模型为基础,采用离散相模型,对风刀吹扫去除传输镜表面颗粒物污染物的流场,以及吹扫去除过程中颗粒物的运动轨迹进行了模拟,并基于模拟仿真结果搭建了颗粒物污染捕捉和收集的装置,最终提高了传输镜表面污染物的清除效率和洁净度,并且在一定程度上避免了吹扫过程中污染物颗粒进入周围环境以造成对其他光学元器件的污染。

By using N-S equations, RNG κ-ε model and discrete phase model of Euler-Lagrange method, numerical simulations on the removal trajectories of contaminant particles of different sizes and types on the mirror surface are conducted with the commercial software Fluent. Benefiting from the simulation results, a useful device which can capture and collect debris from the mirror surface online is built. Ultimately the efficiency of cleaning and cleanliness of transport mirrors are improved. And to some extent, the chances that contaminant particles go into the surrounding environment and further pollute other optical components are reduced.