Analysis and testing of temperature adaptability of large-scale body-mounted radiator

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-11-12 DOI:10.1016/j.csite.2024.105476

Xingxing Huang , Shuncheng Zhang , Kang Han , Zhenyu Lu , Liang Guo , Ming Sun

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引用次数: 0

Abstract

This paper addresses the issue of thermal stress release in large-scale body-mounted radiator for China space station telescope under extreme temperature differences of 80 °C. To address this challenge, an innovative floating combined stress release support mechanism is proposed. Initially, the stress release mechanism for the radiator is designed with an “orthogonal + parallel” layout based on key factors such as radiator size, operating conditions, and thermal stress. Subsequently, through this layout design, specific modeling is conducted for the fixed support point, line-degree-of-freedom release mechanism, and plane-degree-of-freedom release mechanism of the stress release support mechanism. Utilizing elastic mechanics theory, the deformation of the radiator cooling panel is determined to be 2.51 mm, leading to the design of a support mechanism with a release capacity of 5 mm. Finally, the effectiveness of the design is verified through finite element simulation analysis and experimental validation. Thermal-elastic simulation analysis reveals that the strain of the radiator cooling panel under an 80 °C temperature load is 2.75 mm, representing an error of 8 % compared to the theoretical calculation. The maximum stress of 315 MPa in the radiator cooling panel and 873 MPa in the support mechanism are less than the yield strength of the respective materials. Experimental results indicate that during a temperature change of 30 °C, the lateral deformation of the radiator is 0.85 mm, differing by 17.48 % from the simulation analysis result of 1.03 mm for a ΔT of 30 °C. These errors fall within an acceptable range and meet the design requirements. The results strongly confirm that the designed stress release support mechanism can effectively release thermal stress in large-scale body-mounted radiator while ensuring that the deformation of the radiator remains within the safe range of the sliding distance of the stress release support mechanism.

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大型车身散热器的温度适应性分析和测试

本文探讨了中国空间站望远镜大型体安装散热器在 80 ℃ 极端温差下的热应力释放问题。为解决这一难题，本文提出了一种创新的浮动组合应力释放支撑机构。首先，根据散热器尺寸、工作条件和热应力等关键因素，设计了 "正交 + 平行 "布局的散热器应力释放机构。随后，通过布局设计，对应力释放支撑机构的固定支撑点、线自由度释放机构和平面自由度释放机构进行了具体建模。利用弹性力学理论，确定散热器冷却板的变形量为 2.51 毫米，从而设计出释放能力为 5 毫米的支撑机构。最后，通过有限元模拟分析和实验验证了设计的有效性。热弹性模拟分析表明，散热器冷却板在 80 °C 温度负载下的应变为 2.75 毫米，与理论计算结果相比误差为 8%。散热器冷却板的最大应力为 315 兆帕，支撑机构的最大应力为 873 兆帕，均小于相应材料的屈服强度。实验结果表明，在温度变化 30 °C 时，散热器的横向变形为 0.85 mm，与模拟分析结果（ΔT 为 30 °C 时为 1.03 mm）相差 17.48 %。这些误差在可接受范围内，符合设计要求。这些结果有力地证实了所设计的应力释放支撑机构能够有效释放大型车身安装散热器的热应力，同时确保散热器的变形保持在应力释放支撑机构滑动距离的安全范围内。

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

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.