大气压力对激光辐照双层板接触传热的影响

考虑激光辐照下结构变形对双层板接触传热影响可以更真实地反映两板间的传热情况，通过实验和数值模拟分析了大气压力对接触传热的影响。结果表明:大气压力对接触热阻影响非常明显，当大气压力超过一定值后，双层板界面始终接触，后板中心的温升阶段成类抛物形状；当大气压力在某一范围内，大气压力与温度矩产生的靶板挠度相当，接触面时分时合，后板的温升阶段成振荡式类线性增加；当大气压力小于某一特定值时，后板温度有一突跃过程，通过适当的设计有可能观测到该现象。

Effect of atmospheric pressure on heat transfer by contact between two plates under laser irradiation

The deformation of two contacting plates irradiated by laser can influence heat transfer by contact obviously. The effect of atmospheric pressure on heat transfer by contact are analyzed by some experiments and numerical simulations. It is shown that: the effect of pressure on heat transfer by contact is prominent, when atmospheric pressure is up to some degree, the interface of two plates always contact each other closely, and the rear temperature raise curve is protruding toward up; when atmospheric pressure is in some scope, the interface of two plates contact ever and again, and the rear temperature raise curve is analogous to linearity; when atmospheric pressure is under some degree, the rear temperature would transit up at some time. Three kinds of temperature curve would be observed with proper designs.