二氧化碳在金属丝网的毛细动力学实验与分析

Experimental Study of Carbon Dioxide Capillary Dynamic Rise along Metal Mesh

二氧化碳(CO2)作为制冷剂具有环保及良好的热力特性,已经越来越受到重视,并将率先应用在航天毛细驱动的两相循环冷却技术(CPL)和环路热管(LHP)中,但是由于它的工作压力较高,对其毛细动力特性研究还没有实验支持。文章的目标是通过实验测量CO2在不锈钢丝网爬升的动态结果,进行毛细上升的动力学分析,并将实验结果与几个经典的公式进行比较,找出最佳适用公式。

As a refrigerant, carbon dioxide （CO2 ） has good environmental protection and thermodynamics characteristics and has been considered as one of the most important work fluid. CO2 will be tried to use in capillary pump loop （CPL） technique or Loop heat pipe （LHP）, especially for the space applications. Because of higher operation pressure, there＇re few experiments about its capillary dynamics investigation. The experiments about CO2 wicking along metal mesh have been carried out to investigate the capillary dynamic characteristics about capillary rise capability. Meanwhile, experimental results have been compared with some classical formulas and the optimal equation has been pointed out.