高能激光辐照条件下构件温度场模拟研究

The Research on Temperature Field Simulation of the Component under High Energy Laser Irradiation

采用有限元分析对一定功率激光辐照下不同结构的涂层温度场进行计算分析,探索在一定功率密度下涂层结构中不同铝和氧化锆组分比例对温度场的影响。结果表明,当金属基体上采用反射+散热+隔热的涂层结构时,在反射率一定的情况下,随着热疏导涂层的增厚,陶瓷隔热层随之减薄,隔热效应变弱,能量大量向基体传导,导致基体升温。当热疏导涂层和陶瓷隔热层的厚度比例为1∶3时,可达到最佳的隔热效果。

Use the finite element analysis to calculate with the ditlerent structure coating temperature tleta unaer a cer- tain power laser irradiation. Explore the effect of the temperature field in the coating structure with different AI and YSZ fractions under a certain power density. The results show that when using reflection ＋ cooling -- heat insulation coating structure on the base metal, with a certain reflectivity and coating of heat dispersion further thickening, due to the ceramic insulation layer along with thinning, the thermal insulation effect is weaker, and a lot of energy conducts to the substrate leading the substrate temperature increaseing. When the thickness ratio of the thermal conduction coating and the ceramic heat insulation layer is 1 ： 3, the optimum heat insulation effect can be achieved.