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通过红外热像仪测温装置,对有限厚度试件在激光点热源作用下热作用区侧面温度分布进行实时测量。结果表明:对于小厚度的试件,材料内部温度分布与用傅立叶定律得到的结果完全相反,材料内部的温度高于边界温度。对比短脉冲激光作用下产生非傅立叶效应的条件,它们之间有很大差异,由此提出将实验中出现的非常规现象定义为泛傅立叶效应,认为它是由于热量传播到边界时发生反射、叠加等波动行为所致。
Through the temperature measuring device of infrared thermal imager, the temperature distribution on the side of the heat affected zone under the action of the laser spot heat source is measured in real time. The results show that for the small thickness specimens, the temperature distribution inside the material is completely opposite to that obtained by Fourier law, and the temperature inside the material is higher than the boundary temperature. Compared to the conditions under which a short pulse laser produces non-Fourier effects, there is a great difference between them. Therefore, we propose to define the unconventional phenomenon in the experiment as a pan-Fourier effect, which is thought to be reflected when heat propagates to the boundary. Superimposed and other fluctuations caused by behavior.