高热流密度热沉散热能力数值仿真分析

摘要

固体激光器增益介质的热效应问题严重制约了高功率固体激光器的发展.本文从实际应用角度出发,通过数值仿真实验对比散热热沉的主要几何参数(包括热沉基底厚度、肋片高度、肋片宽度、肋片间距)对散热效果的影响;同时也分析了不同的外部流量条件下热沉的散热性能.计算结果表明:优化热沉几何参数,选取适宜的流量,热沉散热效果会有一定提升.%The thermal effect of the solid laser seriously restricts its application.Starting from practical application,the effect of the main geometrical parameters of heat sink on cooling effect is compared and analyzed by numerical simulation,including the thickness of the base,fin height,fin width,fin spacing.At the same time,the cooling capacity is also analyzed at the different fluxes.The results indicate that the cooling capacity will be improved by optimizing the heat sink geometry parameters and selecting appropriate flux.