强激光与粒子束, 2011, 23 (6): 1487, 网络出版: 2011-07-04
评估固体激光器对流换热系数的方法
Method to estimate surface heat transfer coefficient of solid-state laser
固体激光器 热管理 对流换热系数 激光放大器 有限元分析 solid-state lasers thermal management surface heat transfer coefficient lasers amplifiers finite-element analysis
摘要
为提高固体激光器的热管理效果，提出了一种使用316L不锈钢片代替激光晶体评估固体激光器表面对流换热系数的方法。在低冷却水温的条件下，使用快响应热电偶对替代片和出口水流的动态温度进行测量，应用有限元方法计算不同对流换热系数下替代片的动态温度,讨论了对流换热系数对重频大能量激光器热效应的影响。通过寻找测量值和计算值的最小方差，得到该冷却结构下的激光器表面对流换热系数为3 500 W·m-2·K-1。
Abstract
This article proposes a simple method using a false crystal (316L steel) to estimate the surface heat transfer coefficient of solid-state laser. First we set a low cooling water temperature, measure the temperature evolution of outlet water and the false crystal with two thermal couples, and then we calculate temporal evolution of temperature with arbitrary heat transfer coefficient using finite element analysis. By searching the lowest least square difference between measurement and simulation, heat transfer coefficient is estimated finally. The impact of heat transfer coefficient in rep-rated and high-energy laser design is also presented.
王明哲, 郑建刚, 张永亮, 李明中, 严雄伟, 单小童, 蒋新颖, 景峰. 评估固体激光器对流换热系数的方法[J]. 强激光与粒子束, 2011, 23(6): 1487. Wang Mingzhe, Zheng Jian’gang, Zhang Yongliang, Li Mingzhong, Yan Xiongwei, Shan Xiaotong, Jiang Xinying, Jing Feng. Method to estimate surface heat transfer coefficient of solid-state laser[J]. High Power Laser and Particle Beams, 2011, 23(6): 1487.
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