强激光与粒子束2025，Vol.37Issue(5)：19-28,10.DOI:10.11884/HPLPB202537.240314
连续热源加载下二维热扩散长度的数值模拟与测量
Numerical simulation and measurement of two-dimensional thermal diffusion length under continuous heat loading
摘要
Abstract
Thermal diffusion coefficient is an important parameter of optical components in high-energy and high-power laser systems,and it is related to the laser damage resistance of components.However,the measurement error of the existing thermal diffusion coefficient measurement methods is large under the condition of multi-dimensional thermal conduction.As thermal diffusion length is the basis of thermal diffusion coefficient measurement,our study used the finite element method to simulate the two-dimensional heat conduction under continuous heating of heat source,and summarized the relationship between thermal diffusion length,thermal diffusion coefficient and heating time.On this basis,it proposed a model and method for measuring two-dimensional thermal diffusion length under continuous heating of heat source.Firstly,finite element analysis was used to establish a model to simulate the relationship between thermal diffusion length and thermal diffusion coefficient in one-dimensional heat conduction,and the two models were compared with numerical analytical expressions.The feasibility of using continuous heat source and thermal diffusion length to solve the thermal diffusion coefficient was verified.The effects of heat loss,sample thickness and heat source loading time on the results were discussed.Finally,the practical measurement scheme and measures to improve the measurement accuracy were put forward.This study provides a way to measure the thermal diffusion length of materials or components conveniently and accurately,and is of great significance for fabrication of high power and high energy laser system components.关键词
连续热源/热扩散系数/热扩散长度/有限元法Key words
continuous wave laser/thermal diffusion coefficient/thermal diffusion length/finite element method分类
物理学引用本文复制引用
花艳,李笑玲,韩玉晶,刘晓凤,李大伟,赵元安,帅坤,王焜..连续热源加载下二维热扩散长度的数值模拟与测量[J].强激光与粒子束,2025,37(5):19-28,10.基金项目
上海市"科技创新行动计划"港澳台科技合作项目(22220760300) （22220760300）
中国科学院国际合作局对外合作重点项目(181231KYSB20210001) （181231KYSB20210001）
