基于摆线的自然散热翅片结构设计与优化

Structural Design and Optimization of Natural Cooling Fin Based on Cycloid

中文关键词: 自然散热  摆线  设计优化  数值模拟

英文关键词: natural cooling  cycloid  design and optimization  numerical simulation

中文摘要:

      自然散热因其结构简单、可靠性高、成本优势明显而被广泛用于电子设备散热，为应对电子器件越来越高的热流密度，自然散热冷板的散热性能有待进一步提升。文中依据最速降线模型提出了一种摆线型散热翅片，通过数值模拟与传统直翅的散热性能做了对比研究，同时对摆线翅片影响参数进行了优化设计。结果表明：与传统直翅相比，摆线翅片的散热性能提升明显，相同情况下摆线翅片对应器件温度比传统直翅降低4℃以上；摆线半径、摆线角度均对摆线翅片散热性能有影响，在给定边界条件下，摆线半径为200 mm、入口角度为30º时摆线翅片散热性能最佳，对应器件温度比传统直翅降低约5.9℃。

英文摘要:

      Natural cooling is widely used for cooling electronic equipment due to its simple structure, high reliability and obvious cost advantages. In order to cope with the increasingly high heat flux of electronic devices, the heat transfer performance of natural cooling plate needs to be further improved. In this paper a kind of cycloid fin is proposed based on the model of brachistochrone curve. The heat transfer performance is compared with that of traditional straight fin through numerical simulation, and the parameters affecting the cycloid fin are optimized and designed. The results show that the heat transfer performance of the cycloid fin is significantly improved compared with that of the traditional straight fin. Under the same conditions, the temperature of the device corresponding to the cycloid fin is reduced by more than 4℃ compared with that of the device corresponding to the traditional straight fin; the cycloid radius and cycloid angle both have impact on the heat transfer performance of the cycloid fin. Under the given boundary conditions, heat transfer performance of the cycloid fin is the best when the cycloid radius is 200 mm and the inlet angle is 30º, and the corresponding device temperature is about 5.9℃ lower than that of the traditional straight fin.