Abstract The one-dimensional unsteady heat transfer of a polymer layer on a finite base is studied. A numerical inverse method is developed to calculate heat flux from surface-temperature images obtained using temperature-sensitive coating particularly in high-enthalpy wind tunnels. It is found that the effect of the finite thickness of the base is significant as time increases such that the semi-infinite base assumption made in many methods is no longer accurate in heat-flux calculation. The method developed in this work can take into account the effects of the finite thickness of a base and the temperature-dependencies of the thermal properties of the materials. This method has been validated through simulations and processing the experimental temperature-sensitive-paint (TSP) images.

中文翻译：

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有限基温敏涂层测量热通量的数值逆计算方法

摘要 研究了有限基聚合物层的一维非定常传热问题。开发了一种数值逆方法，用于从使用温度敏感涂层获得的表面温度图像计算热通量，特别是在高焓风洞中。结果表明，随着时间的增加，基底有限厚度的影响显着，使得许多方法中的半无限基底假设在热通量计算中不再准确。在这项工作中开发的方法可以考虑基底有限厚度的影响和材料热性能的温度依赖性。该方法已通过模拟和处理实验温度敏感涂料 (TSP) 图像得到验证。