具有导流孔结构的自相似微通道热沉

周华; 唐巍; 曾赟; 赵洋; 陈泽; 宁翰宇; 董兴旺; 邹昌成

doi:10.13224/j.cnki.jasp.20210475

具有导流孔结构的自相似微通道热沉

doi: 10.13224/j.cnki.jasp.20210475

周华¹,
唐巍^1,*, ,,
曾赟¹,
赵洋¹,
陈泽¹,
宁翰宇¹,
董兴旺²,
邹昌成¹

1.
四川农业大学水利水电学院，四川雅安 625014
2.
雅化锂业（雅安）有限公司，四川雅安 625000

详细信息

作者简介:
周华（1996-），男，硕士生，主要从事高性能换热器研究

通讯作者:
唐巍（1989-），男，讲师，博士，主要从事微通道换热研究。E-mail：weitangscu@163.com

中图分类号: V231.1
计量
- 文章访问数: 85
- HTML浏览量: 35
- PDF量: 39
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-30
- 网络出版日期: 2023-11-03

A self-similarity heat sink with the structure of deflector hole

1.
College of Water Conservancy and Hydropower Engineering，Sichuan Agricultural University，Ya’an Sichuan 625014，China
2.
Yahua Lithium Industry （Ya’an） Corporation，Ya’an Sichuan 625000，China

摘要

摘要:
自相似微通道热沉（SSHS）具有结构紧凑、散热性能强、可扩展性好等特点，可应用于高发热电子芯片的散热。为克服自相似热沉内部的流动分配不均，进一步提高散热性能，提出一种具有导流孔结构的自相似微通道热沉。使用数值计算方法验证该结构设计的有效性。结果表明：具有导流孔结构的自相似微通道热沉内流体垂直冲击溢流道起到强化换热作用。计算单元入口流量在0.58～1.44 kg/h时，相比原型SSHS，改进型SSHS流量分配均匀性大幅改善，加热面最高温度降低10 K，加热底面温度分布均匀性提高57%，同时进出口压降降低约10.4%。在改进型基础上对射流孔尺寸进行了进一步结构优化，与改进型相比以更大的进出口压降（提高约16.5%）为代价，取得了更好的流动分配均匀性及散热性能。
- 自相似微通道热沉（SSHS） /
- 导流孔 /
- 流动分配 /
- 散热均匀性 /
- 数值计算
Abstract:
Self-similarity heat sink (SSHS) has the advantages of compact structure design, prominent heat transfer performance and extendibility, which can be applied in cooling the electronic chips. A new SSHS with the structure of deflector hole was proposed to overcome the maldistribution and improve the overall heat transfer performance. Numerical simulation was carried out to validate the new structure design of the SSHS. For the SSHS with the structure of deflector hole, the coolant was distributed to the deflector holes, subsequently impinged the bottom of the overflow channels, which enhanced the heat transfer of the SSHS. Comparison between the original and optimized SSHS was carried out with respect to flow distribution uniformity, heat transfer capacity and heat dissipation uniformity. For the mass flow rate covering 0.58−1.44 kg/h, the optimized SSHS had a better flow distribution uniformity, the maximum temperature on the heating surface was reduced by 10 K, the heat dissipation uniformity was increased by 57%, and average pressure drop was reduced by 10.4% compared with the original SSHS. The geometric dimensions of the deflector holes were further optimized, and better flow distribution and overall heat dissipation performance were achieved with the sacrifice of increasing the pressure drop of 16.5% compared with the optimized SSHS.
- self-similarity heat sink (SSHS) /
- deflector hole /
- flow distribution /
- heat dissipation uniformity /
- numerical simulation

HTML

图 1 网格无关性验证

Figure 1. Mesh independence validation

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图 2 原型与改进型SSHS整体结构及流动示意图

Figure 2. Schematic diagram of the overall structure and flow of prototype and improved SSHS

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图 3 原型及改进型SSHS单元模型结构尺寸及网格（单位：mm）

Figure 3. Prototype and improved SSHS element model structure dimensions and mesh （unit: mm）

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图 4 计算方法验证

Figure 4. Calculation method validation

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图 5 原型与改进型SSHS换热及流动特性对比（Q_inlet=0.86 kg/h）

Figure 5. Comparison of heat transfer and flow characteristics of prototype and improved SSHS （Q_inlet=0.86 kg/h）

下载: 全尺寸图片幻灯片

图 6 不同流量下原型与改进型SSHS流动分配均匀性，换热性能及压降对比（Q_in=0.58～1.44 kg/h）

Figure 6. Comparison of flow distribution uniformity, heat transfer performance and pressure drop between prototype and improved SSHS under different flow rates （Q_in=0.58−1.44 kg/h）

下载: 全尺寸图片幻灯片

图 7 改进型与进一步改进型SSHS几何尺寸图（单位：mm）

Figure 7. Improved and further improved SSHS geometry （unit: mm）

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图 8 改进型与进一步改进型SSHS速度云图及加热底面温度分布对比（Q_inlet=0.86 kg/h）

Figure 8. Improved and further improved SSHS velocity cloud map and temperature distribution of heating bottom surface （Q_inlet =0.86 kg/h）

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图 9 不同流量下改进型与进一步改进型SSHS流动分配，换热性能及压降对比（Q_in=0.58～1.44 kg/h）

Figure 9. Comparison of flow distribution, heat transfer performance and pressure drop between improved and further improved SSHS under different flow rates （Q_in=0.58—1.44 kg/h）

下载: 全尺寸图片幻灯片

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