Numerical analysis of non-Fourier heat conduction dynamics in the composite layer

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-09-27 DOI:10.15282/jmes.17.3.2023.6.0760

None R. Yuvaraj, None R. Senthilkumar

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Abstract

This paper presents the numerical analysis of non-Fourier heat conduction in thin composite layers under asymmetrical boundary conditions. In the thermal barriers such as steam and gas turbine blades, thin film coating are used to protect the blade from thermal damage. The coating on the blades are very short in length. Heat conduction across thin composite layer with short time is examined using a finite element approach. With this very small duration with the finite speed of the thermal wave, the Fourier mode of heat conduction is disappeared due to the infinite speed of the thermal wave assumption. Therefore, analyzing the non-Fourier heat conduction in thin layers is essential. The developed model is executed in Python using Newmark's scheme and the constant average acceleration method to predict the temperature variation and temperature contours. The present model is validated with an experimental and numerical solution with good agreement. Besides, the temperature distribution across the composite layer with the entire length of the substrate and the coating for different thermal conductivity values, thermal diffusivity, and relaxation time are examined. It is noted that when the dimensionless

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复合材料层非傅立叶热传导动力学的数值分析

本文对非对称边界条件下复合材料薄层的非傅立叶热传导进行了数值分析。在蒸汽和燃气轮机叶片等热障中，薄膜涂层用于保护叶片免受热损伤。叶片上的涂层长度很短。采用有限元方法研究了复合材料薄层短时间内的热传导问题。在这个极小的持续时间和有限的热波速度下，由于热波的无限速度假设，热传导的傅立叶模式消失了。因此，分析薄层中的非傅立叶热传导是必要的。所开发的模型在Python中使用Newmark的方案和恒定平均加速度方法来预测温度变化和温度轮廓。通过实验和数值解验证了模型的正确性。此外，还研究了不同导热系数、热扩散系数和弛豫时间下的复合层和涂层的温度分布。值得注意的是，当无因次时

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.