分叉微通道换热器对流换热性能的数值模拟研究*

doi:10.7523/j.ucas.2024.071

摘要/Abstract

摘要： 受到叶脉等自然分叉结构的启发,本文采用数值模拟的方法研究了分叉微通道换热器基本单元的对流换热情况,在固定第一级通道参数基础上,改变分叉结构第二级通道的宽度,详细分析了通道内的温度场以及流场,得到了入口到第二级通道各个位置处的压降、对流换热系数和综合换热评价系数。结果显示,分叉结构起到增强流体扰动和打断并形成新流体边界层的作用,强化了换热也使得温度分布更均匀。在第二级流道1mm以内,内部流动入口效应影响较大,分叉后水力直径与分叉前水力直径比为0.54情况下的综合换热评价系数最大;在第二级流道1mm以外,分叉后水力直径与分叉前水力直径比为0.80情况下的综合换热评价系数最大。该研究对分叉微通道换热器的优化设计起到参考和指导意义。

关键词: 微通道散热器, 强化传热, 分叉结构, 分形

Abstract: Inspired by the natural bifurcation structure such as blade veins, this paper uses numerical simulation to study the convective heat transfer of the basic unit of the bifurcated microchannel heat sink. On the basis of fixing the parameters of the first stage channel, changing the width of the second stage channel of the bifurcated structure, and analyzing the temperature field and flow field in the channel in detail. The pressure drop, convective heat transfer coefficient and comprehensive heat transfer evaluation coefficient from the inlet to the second stage were obtained. The results show that the bifurcation structure can enhance the fluid disturbance, interrupt and form a new fluid boundary layer, strengthen the heat transfer and make the temperature distribution more uniform. Within 1mm of the second stage, the inlet effect of internal flow is more influential, and the comprehensive heat transfer evaluation coefficient is the largest when the ratio of hydraulic diameter after bifurcation to hydraulic diameter before bifurcation is 0.54. When the ratio of hydraulic diameter after bifurcation to hydraulic diameter before bifurcation is 0.80, the comprehensive heat transfer evaluation coefficient is the largest outside the second stage channel 1mm. The research can be used as reference and guidance for the optimal design of bifurcated microchannel heat sinks.

Key words: microchannel heat sink, enhance heat transfer, bifurcated structure, fractal

中图分类号:

TK124

柯伟宣, 穆建超, 王豪, 蔡可蒙, 刘捷. 分叉微通道换热器对流换热性能的数值模拟研究^*[J]. 中国科学院大学学报, DOI: 10.7523/j.ucas.2024.071.

KE Weixuan, MU Jianchao, WANG hao, CAI kemeng, LIU Jie. Numerical simulation of convective heat transfer performance of bifurcated microchannel heat sink[J]. Journal of University of Chinese Academy of Sciences, DOI: 10.7523/j.ucas.2024.071.

参考文献

[1] Bailey C.Thermal management technologies for electronic packaging: current capabilities and future challenges for modelling tools[C]//2008 10th Electronics Packaging Technology Conference. Singapore: IEEE, 2008:527-532. DOI:10.1109/EPTC.2008.4763487.
[2] He Z Q, Yan Y F, Zhang Z E.Thermal management and temperature uniformity enhancement of electronic devices by micro heat sinks: A review[J]. Energy, 2021, 216: 119223. DOI:10.1016/j.energy.2020.119223.
[3] Nadjahi C, Louahlia H, Lemasson S.A review of thermal management and innovative cooling strategies for data center[J]. Sustainable Computing: Informatics and Systems, 2018, 19: 14-28. DOI:10.1016/j.suscom.2018.05.002.
[4] Moore G E.Cramming more components onto integrated circuits[J]. Proceedings of the IEEE, 1998, 86(1): 82-85. DOI: 10.1109/JPROC.1998.658762.
[5] Peng M, Chen L, Ji W T, et al.Numerical study on flow and heat transfer in a multi-jet microchannel heat sink[J]. International Journal of Heat and Mass Transfer, 2020, 157: 119982. DOI:10.1016/j.ijheatmasstransfer.2020.119982.
[6] Lee J, Mudawar I.Fluid flow and heat transfer characteristics of low temperature two-phase micro-channel heat sinks-Part 1: Experimental methods and flow visualization results[J]. International Journal of Heat and Mass Transfer, 2008, 51(17/18): 4315-4326. DOI:10.1016/j.ijheatmasstransfer.2008.02.012.
[7] Lee J, Mudawar I.Low-temperature two-phase microchannel cooling for high-heat-flux thermal management of defense electronics[J]. IEEE Transactions on Components and Packaging Technologies, 2009, 32(2): 453-465. DOI:10.1109/TCAPT.2008.2005783.
[8] Colgan E G,Furman B, Gaynes M,et al.High performance and subambient silicon microchannel cooling[J]. Journal of Heat Transfer, 2007,129(8):1046-1051. DOI:10.1115/1.2724850.
[9] Yan Y F, Yan H Y, Yin S Y, et al.Single/multi-objective optimizations on hydraulic and thermal management in micro-channel heat sink with bionic Y-shaped fractal network by genetic algorithm coupled with numerical simulation[J]. International Journal of Heat and Mass Transfer, 2019, 129: 468-479. DOI:10.1016/j.ijheatmasstransfer.2018.09.120.
[10 ] 郝俊娇,潘日,周刚,等. 高热流密度电子元件中热管散热技术的进展[J]. 化工进展, 2015, 34(5): 1220-1224, 1231. DOI: 10.16085/j.issn.1000-6613.2015.05.006.
[11] Tuckerman D B, Pease R F W. High-performance heat sinking for VLSI[J]. IEEE Electron Device Letters, 1981, 2(5): 126-129. DOI:10.1109/EDL.1981.25367.
[12] Sui Y, Teo C J, Lee P S, et al.Fluid flow and heat transfer in wavy microchannels[J]. International Journal of Heat and Mass Transfer, 2010, 53(13/14): 2760-2772. DOI:10.1016/j.ijheatmasstransfer.2010.02.022.
[13] Wang R J, Wang J W, Lijin B Q, et al.Parameterization investigation on the microchannel heat sink with slant rectangular ribs by numerical simulation[J]. Applied Thermal Engineering, 2018, 133: 428-438. DOI:10.1016/j.applthermaleng.2018.01.021.
[14] Cheng X, Wu H Y.Enhanced flow boiling performance in high-aspect-ratio groove-wall microchannels[J]. International Journal of Heat and Mass Transfer, 2021, 164: 120468. DOI:10.1016/j.ijheatmasstransfer.2020.120468.
[15] Weir B S, MacDonald N. Trees and networks in biological models[J]. Biometrics, 1984, 40(4): 1210. DOI:10.2307/2531182.
[16] Murray C D.The physiological principle of minimum work: i. the vascular system and the cost of blood volume[J].Proceedings of the National Academy of Sciences of the United States of America, 1926, 12(3): 207-214. DOI:10.1073/pnas.12.3. 207.
[17] Bejan A, Errera M R.Deterministic tree networks for fluid flow: geometry for minimal flow resistance between a volume and one point[J]. Fractals, 1997, 5(4): 685-695. DOI: 10.1142/s0218348x97000553.
[18] Pence D.Reduced pumping power and wall temperature in microchannel heat sinks with fractal-like branching channel networks[J]. Microscale Thermophysical Engineering, 2003, 6(4): 319-330. DOI:10.1080/10893950290098359.
[19] Senn S M, Poulikakos D.Laminar mixing, heat transfer and pressure drop in tree-like microchannel nets and their application for thermal management in polymer electrolyte fuel cells[J]. Journal of Power Sources, 2004, 130(1/2): 178-191. DOI:10.1016/j.jpowsour.2003.12.025.
[20] Ma C B, Sun Y N, Wu Y J, et al.A bio-inspired fractal microchannel heat sink with secondary modified structure and sub-total-sub fluid transmission mode for high heat flux and energy-saving heat dissipation[J]. International Journal of Heat and Mass Transfer, 2023, 202: 123717. DOI: 10.1016/j.ijheatmasstransfer.2022.123717.
[21] Peng H, Guo W H, Li M L.Thermal-hydraulic and thermodynamic performances of liquid metal based nanofluid in parabolic trough solar receiver tube[J]. Energy, 2020, 192: 116564. DOI:10.1016/j.energy.2019.116564.
[22] Chai L, Xia G D, Wang L, et al.Heat transfer enhancement in microchannel heat sinks with periodic expansion-constriction cross-sections[J]. International Journal of Heat and Mass Transfer, 2013, 62: 741-751. DOI:10.1016/j.ijheatmasstransfer.2013.03.045.

[1]	赵胡兰, 杨兆萍, 时卉, 刘勤, 韩芳, 王璀蓉, 郭姣姣. 乌鲁木齐市A级旅游景区系统空间结构分形研究[J]. 中国科学院大学学报, 2021, 38(3): 367-373.
[2]	王世学, 梁昭军, 赵玉龙, 李彦哲. 部分填充泡沫金属对温差发电器性能影响的实验研究[J]. 中国科学院大学学报, 2018, 35(2): 233-239.
[3]	邓富亮, 范协裕, 王刚, 马娟. 一种FNEA影像分割算法中初始对象的快速构建方法[J]. 中国科学院大学学报, 2014, 31(4): 484-491.
[4]	郑水草. 关于图有向自保形分形的开集条件[J]. 中国科学院大学学报, 2013, 30(4): 443-449.
[5]	丁振, 芮小平, 刘真余, 陆瑾. 基于中心差分法的理想水体三维运动效果的模拟[J]. 中国科学院大学学报, 2013, 30(1): 33-39.
[6]	李康, 焦晓祥. 复格拉斯曼流形G(2,5)中的调和2-球面[J]. 中国科学院大学学报, 2011, 28(5): 573-582.
[7]	谢天成 覃平谢正观. 环北部湾经济圈城镇体系结构及其分形模型研究[J]. 中国科学院大学学报, 2008, 25(2): 185-191.
[8]	沈丹. 两个独立稳定从属过程占位时测度投影的重分形性质[J]. 中国科学院大学学报, 2008, 25(2): 145-150.
[9]	理素霞张灿吴伟仁. 基于MANET环境下的小波分形插值的QoS控制方法[J]. 中国科学院大学学报, 2007, 24(2): 248-252.
[10]	匡文慧张树文. 长春百年城市土地利用空间结构演变的信息熵与分形机制研究[J]. 中国科学院大学学报, 2007, 24(1): 73-80.
[11]	贾涛; 刁彦华. 核态沸腾中汽化核心密度的分形分布[J]. 中国科学院大学学报, 2006, 23(3): 306-312.
[12]	朱志良, 赵德平, 朱伟勇. Julia曲线"与分形图像压缩编码[J]. 中国科学院大学学报, 2002, 19(2): 177-181.

分叉微通道换热器对流换热性能的数值模拟研究^*

Numerical simulation of convective heat transfer performance of bifurcated microchannel heat sink

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 12

编辑推荐

Metrics

本文评价

访问统计

联系我们