Numerical study on the cooling characteristic of a novel laminated cooling configuration with chained beam turbulator in an afterburner heat shield

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-07-02 DOI:10.1016/j.icheatmasstransfer.2025.109256

Chengao Duan , Xiaohui Bai , Yuanlei Tang , Ziwen Wang , Cunliang Liu

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Abstract

The next-generation aircraft engine requires the development of high-efficiency laminate cooling configurations to protect afterburners. This paper proposes a novel laminated cooling configuration featuring a chained beam turbulator with annular holes. The film cooling effectiveness and the overall cooling effectiveness of the chained beam turbulator are calculated and compared with existing configurations. The effect of different parameters and temperature uniformity on the film cooling effectiveness of the chained beam turbulator is systematically researched. The results demonstrate that the novel laminated cooling configuration exhibits a higher cooling advantage. Compared to the cylindrical spoiler laminate, the surface-averaged film cooling effectiveness of the chained beam turbulator has increased by 7.0 %, while that of the existing cellular partition laminate increased by 7.1 %. The overall cooling effectiveness of the chained beam turbulator is 8.7 % higher than that of the cylindrical spoiler laminate, demonstrating the highest comprehensive cooling performance compared to other configurations. At a high momentum ratio of 0.16 (representing high-power engine operation), the uneven factor of temperature distribution of the new type laminate decreases by 2.1 %, whereas that of the cellular partition laminate reduces by 1.4 %. The average relative standard deviation of the chained beam turbulator is the lowest, which indicates that it has more superior temperature uniformity in three type laminates. Additionally, increases in the momentum ratio, distance between holes, and the end diameter of spoiler column all contribute to enhancing the heat insulating performance of the heat shield composed of the new type laminate.

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加力燃烧室隔热罩带链束紊流层叠冷却结构冷却特性的数值研究

下一代航空发动机需要开发高效的层压板冷却配置来保护加力燃烧室。本文提出了一种新的层压冷却结构，该结构采用带环形孔的链束湍流器。计算了链梁湍流器的气膜冷却效率和整体冷却效率，并与现有配置进行了比较。系统研究了不同参数和温度均匀性对链束湍流器气膜冷却效果的影响。结果表明，新型层压冷却结构具有较高的冷却优势。与柱状扰流板相比，链束湍流器的表面平均气膜冷却效率提高了7.0%，而现有的蜂窝隔板层板的表面平均气膜冷却效率提高了7.1%。链束湍流器的整体冷却效率比圆柱扰流板高8.7%，综合冷却性能优于其他结构。在0.16的高动量比下（代表大功率发动机运行），新型层压板的温度分布不均匀系数降低了2.1%，而蜂窝隔板层压板的温度分布不均匀系数降低了1.4%。链束湍流器的平均相对标准差最低，表明其在三种层压板中具有较好的温度均匀性。此外，动量比、孔间距和扰流柱端径的增加都有助于增强新型层压板构成的隔热板的隔热性能。

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 Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.