【作者】 云永琥；

【导师】 朱敏波；

【作者基本信息】 西安电子科技大学 ， 机械设计及理论， 2011， 硕士

【摘要】 气冷冷板由于高效的换热性能以及紧凑的结构,已成为电子设备中一种很重要的散热器,使得近年来对于冷板的研究越来越多。以往国内外对冷板翅片的研究多以理论和实验为主,并通过大量的对比分析计算得出各种翅片的性能参数。现阶段,随着计算流体力学的应用日益广泛和深入,特别是对于各种实际问题的模拟计算,利用计算机数值模拟软件将会更快速、更直观地得到计算结果,使得仿真软件成为工程设计和研究的重要工具之一。因此,本文以三类不同翅片结构的气冷冷板作为研究对象,通过数值模拟仿真的方法,对其换热及流动的过程进行了分析研究。首先对矩形翅片冷板的传热和流动特性进行了数值模拟研究,得到预测冷板的传热及阻力性能的试验关联式,并对计算结果进行极差分析,获得冷板结构尺寸对换热特性的影响规律。其次对某电子设备机箱上的直排翅片冷板进行热特性的研究,并提出在仿真软件中建立等效模型代替冷板进行分析的方法。通过将等效的结果与冷板模型进行对比,证明了等效模型能够代替冷板进行热设计并且计算用时短。最后,在某雷达发射机散热通道内的热设计中,对冷板散热翅片进行结构优化分析,通过数值仿真方法确定出冷板翅片的最优结构尺寸。更多还原

【Abstract】 Air cold plate because of the high heat transfer performance and compact structure, has became a very important radiator in electronic equipment, and make more and more the research for it in the recent years. Previously, the research of fin of air cold plate is mainly theoretical and experimental at home and abroad, by calculating performance parameters of various fins with a large number of comparative analyses. At present, with the computational fluid dynamics are applied widely and deeply, especially for the simulation of various practical problems. The numerical simulation software will be more quickly and more intuitively to get the calculation result. It makes simulation software to be one of important engineering design and research tools. Therefore, this article takes three different types of fin structure of air cold plate as the research object, and analyses the procession of heat transfer and fluid by the method of numerical simulation.Firstly, the heat transfer and flow of cold plate of rectangular fin is analyzed by numerical simulation, to get the experimental correlation which predict the heat transfer and pressure drop performance of cold plate. And obtain the effects of structure size of cold plate on heat transfer characteristic by range analysis of the calculation result. Secondly, the cold plate of vertical rectangle fin is researched for heat transfer characteristic on the electronic equipment cabinet. The method of equivalent model instead of cold plate is proposed in the simulation software. Comparing with cold plate, the results of equivalent model prove that can replace the cold plate in thermal design and reduce the calculation time. Finally, in the thermal design of a radar transmitter cooling channels, the fins of cold plate are analyzed for the structure optimization, and the optimal structure of cold plate is determined by numerical simulation methods.更多还原