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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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.