Numerical study on vibration heat transfer enhancement of multi-configured blunt-headed cylinder with fin device

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-11-29 DOI:10.1016/j.ijthermalsci.2024.109573

Xiaoya Zhang, Derong Duan, Muhao Wang, Changqing Gao, Xuefeng Yang, Hui Zhang

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引用次数: 0

Abstract

The large-scale flow-induced deformation is an effective heat transfer enhancement technology. Then, a blunt-headed cylinder with fin (BHC-F) was proposed to evaluate the heat transfer enhancement performance using flow-induced vibration with different configuration (incident angle Φ). The two-way fluid structure interaction method was utilized to explore the vibration response, flow field and heat transfer performance of BHC-F at Reynolds numbers Re = 500–1500. Vibration results found that the vibration displacement of BHC-F increased with the increase of Φ (0°–180°), which leaded to the acceleration of flow boundary layer separation. When Φ = 180°, the peak displacement of BHC-F reached 3.12 mm, which was 61.66 % and 34.48 % higher than that of Φ = 0° and 90°, respectively. At this time, heat transfer enhancement was obtained because the thermal boundary layer was reduced due to the interaction between the vortex and the wall. In addition, the PEC under all configurations were all greater than 1, indicating that BHC-F achieved the purpose of enhanced heat transfer. The increase of Re has a positive effect on the heat transfer enhancement of BHC-F. When Re = 1500, the maximum heat transfer enhancement of BHC-F-90° reached 13.8 %, which was 62.3 and 26.6 times higher than that of BHC-F-0° and BHC-F-180°. This study establishes a theoretical foundation for employing flow-induced vibration in heat transfer enhancement applications and offers technical support for enhancing the overall performance of heat exchangers.

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带翅片装置的多配置钝头圆柱振动强化传热数值研究

大规模流致变形是一种有效的强化传热技术。然后，提出了一种带翅片的钝头圆柱体（BHC-F），通过不同配置（入射角Φ）的流激振动来评估其传热强化性能。采用双向流固耦合方法研究了雷诺数Re = 500 ~ 1500时BHC-F的振动响应、流场及传热性能。振动结果发现，BHC-F的振动位移随Φ（0°-180°）的增大而增大，导致流动边界层分离加速。当Φ = 180°时，BHC-F的峰值位移达到3.12 mm，比Φ = 0°和90°时分别提高了61.66%和34.48%。此时，由于涡旋与壁面的相互作用，热边界层减少，传热得到增强。此外，各构型下的PEC均大于1，说明BHC-F达到了强化传热的目的。Re的增加对BHC-F的强化传热有积极的影响。Re = 1500时，BHC-F-90°的最大换热强化达到13.8%，分别是BHC-F-0°和BHC-F-180°的62.3和26.6倍。本研究为流激振动在强化换热应用中的应用奠定了理论基础，为提高换热器整体性能提供了技术支持。

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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.