| Citation: | CHEN Xue, LU Guopeng, SUN Chuang, et al. Transient heat transfer experiment and thermal conductivity identification of coating materials[J]. Journal of Aerospace Power, 2023, 38（4）：777-786 doi: 10.13224/j.cnki.jasp.20210208
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In order to evaluate the thermal conductivity of the coating material in the coating substrate integrated double-layer structure, an inversion method of thermal conductivity of coating materials based on transient plane source (TPS) was proposed. According to the Hot-Disk experimental measurement process, a two-dimensional unsteady heat transfer model of substrate-coating-probe was established. Combined with the instantaneous temperature rise data in the experimental test, the thermal conductivity of coating materials was obtained by inversion identification using particle swarm optimization algorithm. The reliability of the above method was demonstrated by experiments and numerical simulation. The results showed this technology can effectively acquire the thermal conductivity of coating with a low deviation less than 4.0%. Finally, the thermal conductivity of a coating material from room temperature to 773 K was obtained by actual measurement and inversion identification. A gradual increase was found as the temperature increased and the numerical range was 0.18−0.29 W/(m·K).
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