Numerical study of flow and heat transfer characteristics of the novel small-channel thermal protection component

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-03-18 DOI:10.1016/j.ijthermalsci.2025.109880

Wanxiang Yao , Xudong Zhang , Tianqi Shao , Yixuan Zhang , Puyan Xu , Yifan Li , Man Fan , Feng Shi , Weixue Cao , Bin Yang

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Abstract

The thermal protection of high temperature as well as large heat flux surface was a key technological challenge in the development of thermal protection science. In this paper, a novel small-channel thermal protection component for curved surface cooling was proposed with reference to tree branching laws. The internal flow and heat transfer characteristics were investigated using numerical simulation techniques. Firstly, a variety of operating conditions were designed to explore the correlation between different material properties and thermal protection effect. Secondly, the heat flow state inside the thermal protection component was analyzed to obtain the optimal operating conditions. Finally, the results showed that the critical Reynolds number for flow within the thermal protection component was 4k and the coefficient of local resistance was 1.67. The thermal insulation coefficient and thermal resistance of the component were 81.12 % and 2.76E-4 at different operating conditions, respectively. The pressure difference between the different stages of flow channels were kept at a steady value during the boiling phase transition heat, respectively. This research was important for the development of electronic communication microelectronics, aerospace and solar energy.

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高温和大热流表面的热保护是热保护科学发展中的一个关键技术挑战。本文参考树枝定律，提出了一种用于曲面冷却的新型小通道热保护元件。利用数值模拟技术对其内部流动和传热特性进行了研究。首先，设计了多种工作条件，以探索不同材料特性与热保护效果之间的相关性。其次，分析了热保护部件内部的热流状态，以获得最佳运行条件。最后，研究结果表明，热保护元件内部流动的临界雷诺数为 4k，局部阻力系数为 1.67。在不同的运行条件下，组件的隔热系数和热阻分别为 81.12 % 和 2.76E-4。在沸腾相变热期间，不同阶段流道之间的压差分别保持在稳定值。这项研究对电子通信微电子、航空航天和太阳能的发展具有重要意义。

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.