| 摘要: |
| 本文通过数值模拟的方法研究了4种不同出流方式的散热器在不同冷却水流量下的换热效果，散热器冷却水进口均为中间喷射式。A、B型散热器均设置一个出口，分别位于散热器的一角及一边的中心；C、D型散热器均设置4个出口，分别位于散热器的四角及四边的中心。对比验证数值模拟结果与实验结果，得到数值模拟相对误差不高于7%。分析散热器的换热系数、速度分布、压力损失、综合系数，结果表明：4出口散热器换热系数不及单出口换热器，但流动阻力较小，散热器综合系数较高，C、D型散热器综合系数较A、B型散热器提高了50%以上，且具有更好的均温性，因此喷射流4出口散热器具有较好的换热和流动效果。 |
| 关键词: 水冷散热器 芯片冷却技术 换热性能 数值模拟 |
| DOI： |
| 投稿时间：2016-11-21
|
| 基金项目:天津市自然科学基金重点项目（13JCZDJC27300）和天津商业大学青年基金项目（150101）。 |
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| Effect of the Water-outlet Mode on the Heat Transfer Performance of Water-cooled Chip Heat Sink |
|
Wang Yabo, Zhu Kai, Cui Zhuo, Wei Jie
|
| (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce) |
| Abstract: |
| This paper presents the experimental and numerical results of the heat-transfer characteristics of a water-cooled heat sink with different outlet layouts. An experimental apparatus was set up to validate the numerical results. The coolant flowed vertically into the heat sinks from the center of their top wall. Heat sinks A and B each had only one outlet, located at one corner or at the center of the edge, respectively. For heat sinks C and D, four outlets were set at each corner or at the center of each edge, respectively. The numerical simulation results were validated by comparing them with experimental data. The results show that the relative error of the numerical simulation is less than 7%. The heat-transfer characteristic of the heat sink depends on four parameters: the velocity distribution, pressure loss, comprehensive effect, and the Nusselt (Nu) number, which is the ratio of convective to conductive heat transfer. The numerical results indicate that the Nu numbers of the heat sinks with four outlets are lower than those with one outlet. However, the flow resistance is lower and the comprehensive coefficient is higher. The comprehensive coefficient of four outlets is 50% higher than that of the heat sink with one outlet. The four-outlet heat sink has better heat transfer and flow effects. |
| Key words: water-cooled heat sink chip cooling heat transfer characteristic numerical simulation |
