Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes
Optimizing the cleanliness in multi-segment disk amplifiers based on vector flow schemes
复制标题
基于矢量流方案优化多段盘式放大器的清洁度
DOI：
10.1017/hpl.2017.36
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发表时间：
2018-01-24
影响因子：
4.8
通讯作者：
Yang, Xiaowei
中科院分区：
文献类型：
--
作者：
Ren, Zhiyuan;Zhu, Jianqiang;Yang, Xiaowei
神光-Ⅱ多段盘放大器清洁度的目的是减少激光对光学器件的损伤。用于污染物颗粒传输的洁净气体流场是影响多段盘式放大器洁净度的关键因素。建立了气固耦合三维流动数值模拟模型。通过流场烟雾实验和SG-Ⅱ 130盘放大器颗粒浓度测量实验，对三维两相流模型进行了验证。通过优化相同流量下的边界条件，多入口矢量流方案不仅可以有效地减少清洗时间，而且可以防止污染物颗粒在多段盘放大器中的反向扩散和污染物颗粒在钕玻璃表面的沉积。
The objective of maintaining the cleanliness of the multi-segment disk amplifier in Shenguang-II (SG-II) is to reduce laser-induced damage for optics. The flow field of clean gas, which is used for the transportation of contaminant particles, is a key factor affecting the cleanliness level in the multi-segment disk amplifier. We developed a gas–solid coupling and three-dimensional flow numerical simulation model. The three-dimensional and two-phase flow model is verified by the flow-field smog experiment and the particle concentration measurement experiment with the 130-disk amplifier in SG-II. By optimizing the boundary conditions with the same flow rate, the multi-inlet vector flow scheme can not only effectively reduce the purging time, but also prevent the reverse diffusion of contaminant particles in the multi-segment disk amplifier and the deposition of contaminant particles on the surface of the Nd:glass.