Effects of the coating type and yarn fiber volume fraction on the coupling heat transfer characteristics for the ceramic matrix composite plate

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-09-27 DOI:10.1016/j.ijthermalsci.2025.110352

Kun DU , Min Xia , Cunliang Liu , Bengt Sunden

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引用次数: 0

Abstract

Ceramic matrix composites (CMCs) are recognized as optimal materials for future aero-engine applications due to their low density and excellent high-temperature resistance performance. However, the anisotropic thermal conductivity presents substantial challenges in thermal analysis, which restricts the application to high-temperature components. In this paper, a 2D woven structure model of a CMC plate was reconstructed using 3D Computed Tomography (CT) scanning technology based on its actual structure. Then, numerical simulations were conducted to investigate the coupling heat transfer characteristics of the CMC plate, focusing on different coating types and yarn's fiber volume fractions (V). The results reveal that the overall cooling effectiveness derived from the woven structure model differs from that of the homogeneous model, as the latter fails to capture the temperature gradient differences between the yarn and the matrix. As V increases from 0.2 to 0.5, the overall cooling effectiveness decreases by 2.4 %, and the temperature gradient differences between the yarn and the matrix become more pronounced. Furthermore, applying coatings to the CMC plate intensifies the temperature gradient differences across various regions and enhances the overall cooling effectiveness by up to 2.2 %.

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涂层类型和纱线纤维体积分数对陶瓷基复合材料板耦合传热特性的影响

陶瓷基复合材料（cmc）由于其低密度和优异的耐高温性能而被认为是未来航空发动机应用的最佳材料。然而，各向异性导热系数在热分析中提出了很大的挑战，这限制了高温元件的应用。本文根据CMC板的实际结构，采用三维计算机断层扫描（CT）技术重建CMC板的二维编织结构模型。然后，对CMC板的耦合传热特性进行了数值模拟，重点研究了不同涂层类型和纱线纤维体积分数(V)的耦合传热特性。结果表明，编织结构模型的整体冷却效果与均匀结构模型不同，因为后者无法捕捉纱线和基体之间的温度梯度差异。当V从0.2增加到0.5时，整体冷却效果下降2.4%，纱线和基体之间的温度梯度差异变得更加明显。此外，在CMC板上涂覆涂层会加强不同区域的温度梯度差异，并将整体冷却效率提高2.2%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.