封闭空间系统的散热强化仿真研究

Simulation study of enhanced heat dissipation in enclosed system

结合对流、辐射和传导理论对一个典型的封闭空间系统的热-流场进行了数值仿真研究,提出了三种具体的促散热方案并开展了仿真分析。结果表明:在系统内部,采用强制对流替代自然对流可大幅促进散热;在系统外表面加工微槽,增大与环境的传热面积,可小幅降低中心平台的温度;在封闭空间内填充入氦气有助于系统散热,通过改变空气和氦气的组成比例,可使中心平台处于特定温度。

The theories of convection, radiation and conduction were used together to study the heat-flow field in a typical enclosed system through numerical simulation. Three specific schemes for promoting heat dissipation were proposed and the corresponding simulation analysis was carried out. The results show that adopting forced convection rather than natural convection within the system can significantly boost heat dissipation; increasing the area for heat transfer between the system and the environment by creating micro-slot on the outer surface of the system can slightly decrease the temperature of the center platform; filling helium into the enclosed system is helpful to cool the system, and adjusting the composition proportions of helium and air can make the center platform keep a certain temperature.