【摘要】 介绍了即将用于国际空间站的以二氧化碳（CO₂）为工质的机械泵驱动两相循环冷却系统（MPL）,储液罐是MPL的重要部件,依靠毛细力对环路补充液体。目标是通过测量CO₂在不锈钢丝网毛细上升的地面实验,找出丝网的结构特性及CO₂的浸润性,为储液罐设计提供安全建议。依据地面实验,得到了丝网的渗透率及CO₂的浸润角,实验的动态结果与毛细动力学方程非常接近,由此可以推断出在不考虑重力的太空环境中丝网携液量的关系式。最终,提出建议在设计储液罐内毛细结构时要考虑毛细结构能够提供的最大供液量,以保证由储液罐进入系统为液态。更多还原

【Abstract】 A mechanical pump loop （MPL） system will be used in international space stations.The system uses carbon dioxide （CO₂） as re- frigerant and has an accumulator which depends on capillary force to supply liquid CO₂ to the loop.In this research,CO₂ capillary rise along metal mesh was measured on earth to find the structure characteristic of mesh and infiltrate ability of CO₂.Permeation rates and contact angles were obtained based on the measurement.The results show that the dynamic solution is close to the data with capillary equations and then the equation for the mesh with liquid in zero gravity condition can be derived.It may be suggested that the mesh structure with the maximum liquid supply should be considered in the design of the accumulator to ensure liquid at the outlet of an accumulator.更多还原