微小型多槽平板热管的流动和传热分析及实验研究

Theoretical and Experimental Investigation on Flow and Heat Transfer in a Flat Miniature Heat Pipe With Axial Grooves

对热管内部的流动和传热传质过程建立模型,分析槽道中液体厚度和弯月面的轴向分布,液体和蒸汽的压力、汽 液界面弯月面半径的轴向变化、汽 液界面流动的相互作用以及管壁的轴向导热,通过计算得到热管的外壁面温度分布和传热性能.同时对一种微小型多槽道平板型铜 水热管进行了性能实验,理论计算和实验数据进行了比较,计算方法得到了实验验证.

The thermal analysis and experimental investigation on a flat miniature heat pipe with axial grooves are carried out. A theoretical model describing the flow and heat and mass transfer processes in the miniature heat pipe is set up. The axial distribution of the film thickness and meniscus of liquid, the axial profile of the pressures of liquid and vapor and the capillary radius of the liquidvapor interface, the frictional interaction at the liquidvapor interface and the axial heat conduction of the wall of the heat pipe are obtained to analyze the temperature distribution of the outer wall of the heat pipe and its thermal characteristics. The current model includes the above factors and simulates the physical phenomena in the miniature heat pipe more accurately. The experimental investigation on a flat miniature axially grooved copperwater heat pipe is conducted. Numerical results are compared with the experimental data and the numerical method is proved by the experiments.