微管道散热器的制造及应用技术研究

【作者】 朱丽；

【导师】 侯丽雅； 章维一；

【作者基本信息】 南京理工大学 ， 机械电子工程， 2003， 硕士

【摘要】 微管道用于电子芯片的冷却已引起极大的关注，相应地对微管道的制造方法及传热分析的需求也与日俱增。本文首先针对微管道的制造问题，介绍了一种快速成型工艺——微立体光刻工艺。由于快速成型领域事实上的数据交换标准STL文件格式在其文件大小与精度之间存在着矛盾，从而影响了其加工分辨率，为此本文实现了一种最优双圆弧拟合技术来提高微立体光刻装置的加工分辨率。在对微管道散热器进行传热分析时，本文利用有限元法在微管道底壁热量任意分布的情况下，计算了微管道的壁面温度和流体温度分布，最终得到了总热阻值。论文最后介绍了一种分形微管道网络，在给出其构造过程的基础上，利用有限元法将其传热能力、所需泵送功率与平行微管道网络进行了比较。更多还原

【Abstract】 Microchannels, used for cooling of electronic chips, have aroused much attention. Accordingly the needs of manufacturing methods for microchannels and analyzing of the heat transfer in microchannels increase steadily. Micro stereolithography, a kind of Rapid Prototyping techniques is introduced firstly in this paper. Because STL file, the defacto standard file format for the Rapid Prototyping Manufacturing, has a trade-off between the accuracy and file size, a Max-Fit biarc curve fitting technique to reconstruct STL slicing data with higher accuracy and to decrease the file size remarkably is presented. Analyzing of the heat transfer in microchannel heat sinks, Finite element method is used to calculate the surface temperature, fluid temperature and the total thermal resistance of microchannel heat sinks with arbitrary base heat flux distribution. A new design of fractal branching channel net for cooling of electronic chips is studied. Based on the generation of a fractal branching net, heat transfer and the required pumping power for fluid flow in fractal microchannels and the parallel channels are compared.更多还原