双基板散热器换热性能的实验研究及数值模拟∗

摘要

In this paper, experimental research and numerical simulation are conducted to investigate the thermal performance difference of a single side and a double-sided heat sink. The results show that experimental research and numerical simulation results are in good agreement, the relative error is less than 5%. The thermal performance of a double-sided heat sink is bet-ter than the single one. What′s more, the superiority is greater with increasing heating power (P). When heating power is 600 W, the temperature (T3) of a double-sided heat sink is 6° lower than the single one. The thermal performance difference is not much between two installation ways of heat blocks on the double-sided heat sink. The main difference is the temperature distribution, so it is more suitable with comprehensive consideration of structure, easy installation and so on when choosing in-stallation ways.%实验测试及仿真计算对比研究单、双基板散热器的换热性能。结果表明，实验测试及仿真计算结果吻合较好，相对误差不超过5%；双基板散热器的换热性能优于单基板散热器，且加热功率P越大，优越性越明显， P为600 W时，双基板散热器上的温度监测点T3比单基板散热器低6°；双基板散热器上加热块的两种布置方式，换热效果相差不大，主要区别在于基板上的温度分布，可综合考虑结构布局、安装方便等因素选择相应的布置方式。