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数据中心空气冷却器的通道传热强化技术研究
Study on Channel Heat Transfer Enhancement Technique for Data Center Air Handling Unit
- 默认刊物名称 2025年
- 作者机构：
西安交通大学能源与动力工程学院 热流科学与工程教育部重点实验室,陕西省西安市710049
- 作者简介：
[ "陶文铨，男，教授，西安交通大学能源与动力工程学院，029-82669106，。研究方向：传热与流动的先进数值计算方法及其应用；强化传热的基本理论与工程应用；电子元器件的冷却技术；微细尺度流动和传热的研究；燃料电池中的关键工程热物理问题等。" ]
- 基金信息：国家自然科学基金(51721004)
DOI：
中图分类号： TB61+1;TK172;TP308收稿日期：2025-01-17，
修回日期：2025-02-05，
录用日期：2025-03-17，
- 稿件说明：
移动端阅览
王子星, 陶文铨. 数据中心空气冷却器的通道传热强化技术研究[J/OL]. 默认刊物名称, 2025.
WANG Zixing, TAO Wenquan. Study on Channel Heat Transfer Enhancement Technique for Data Center Air Handling Unit[J/OL]. Moren journal, 2025.
摘要
本文通过数值仿真方法研究了传统球冠丁胞以及三种新型丁胞（椭球冠形，圆角棒形与圆角梯形）在数据中心空气冷却器换热芯中应用的流动与传热强化特性，所研究雷诺数范围为5728-11176。结果表明传统球冠丁胞的传热强化能力有限，其最大
PEC
为1.067（球冠丁胞R15h2，
Re
= 8383）。而相较于球冠丁胞，三种新型丁胞通道中的高流速区域均更加靠近壁面，使得壁面边界层更薄，从而强化了传热。而在三种新型丁胞之间，通道上壁面处的近壁面高流速区域以及流体冲击效应使得圆角棒形丁胞通道的传热能力好于椭球冠形丁胞，更加复杂的二次流漩涡使得圆角梯形丁胞的传热能力要好于圆角棒形丁胞。圆角梯形丁胞的传热强化效果最好，在等泵功下相较于平直板片通道最高可强化传热33%（
Re
= 5728），而在测试雷诺数范围内其
PEC
均大于1.27。
Abstract
Numerical simulation method is applied to investigate the flow and heat transfer enhancement characteristics for the dimple-enhanced data center air handling unit heat exchanger within Reynolds number range of 5728-11176. The traditional spherical dimple and three novel dimples (ellipsoid dimple
rounded stick dimple and rounded trapezoid dimple) are studied. The results indicate that the traditional spherical dimple has poor heat transfer enhancement performance as the highest
PEC
is 1.067 (spherical dimple R15h2 with
Re
= 8383). Compared with spherical dimple channel
the high velocity regions are all closer to the wall for the three novel dimple channels
which makes thinner boundary layer and enhances heat transfer. Among the three novel dimple channels
the heat transfer ability of rounded stick dimple channel is better than ellipsoid dimple channel because of the larger high velocity area near the upper-wall in the channel and the fluid impingement effect. The more complex second flow vortexes causes higher heat transfer ability of the rounded trapezoid dimple channel compared with rounded stick dimple. Under same pumping power
the rounded trapezoid dimple
channel can enhance heat transfer by up to 33% compare with flat plate channel when
Re
= 5728. And the
PEC
of rounded trapezoid dimple channel are all larger than 1.27 in the tested
Re
region.
关键词
Keywords
references
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