Conjugate heat transfer and fluid flow analysis on printable double-wall effusion cooling with internal topology-optimized TPMS structures

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2024-10-01 DOI:10.1016/j.tsep.2024.102939

Kirttayoth Yeranee, Yu Rao, Chao Xu, Jiajun Xie, Yueliang Zhang

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引用次数: 0

Abstract

Double-wall effusion is a highly efficient cooling technique in modern gas turbine blades. This study uses topology optimization infilled with triply periodic minimal surface structures (TPMS) to design high-performance internal cooling structures, improving cooling effectiveness and mitigating thermal stress for the double-wall channel. The flow, heat transfer, and static structural characteristics of the topology-optimized TPMS model are compared with the results of the smooth and circular pin fin configurations. Results show that the optimized model provides a uniform flow inside the channel and the effusion holes, reducing the jet lift-off and keeping the coolant attached to the effusion wall. Within the blowing ratios of 0.5–1.7, the optimized model improves impingement heat transfer by 9.5 %–12.5 % compared to the pin fin configuration. The averaged overall cooling effectiveness is also 4.2 %–4.6 % with lower pressure loss. The thermal stress and total deformation are evenly distributed and show 22.9 % and 12.0 % lower than the pin fin model. Moreover, a 3D laser scanning microscope and high-resolution CT scan are used to evaluate the manufacturability of the optimized sample, printed by laser powder bed fusion with an actual gas turbine blade scale. The results benefit the fabrication improvement for next-generation gas turbine blades.

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具有内部拓扑优化 TPMS 结构的可打印双壁喷流冷却器的共轭传热和流体流动分析

双壁喷流是现代燃气轮机叶片的一种高效冷却技术。本研究利用拓扑优化填充三周期最小表面结构（TPMS）来设计高性能的内部冷却结构，从而提高冷却效果并减轻双壁通道的热应力。拓扑优化 TPMS 模型的流动、传热和静态结构特征与光滑和圆形针形鳍片配置的结果进行了比较。结果表明，优化模型在通道和喷流孔内提供了均匀的流动，减少了射流升空，并使冷却剂附着在喷流壁上。在 0.5-1.7 的吹气比范围内，优化模型比针形翅片配置提高了 9.5%-12.5% 的撞击传热效果。平均整体冷却效果也提高了 4.2 %-4.6 %，压力损失更低。热应力和总变形分布均匀，分别比针翅模型低 22.9 % 和 12.0 %。此外，还利用三维激光扫描显微镜和高分辨率 CT 扫描评估了优化样品的可制造性，该样品是通过激光粉末床熔融技术与实际燃气轮机叶片尺度打印而成的。这些结果有利于改进下一代燃气轮机叶片的制造。

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

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.