中国空间科学技术

中国空间科学技术 ›› 2025, Vol. 45 ›› Issue (2): 61-69.doi: 10.16708/j.cnki.1000-758X.2025.0023

• 微重力流体科学及其空间应用专题 • 上一篇    下一篇

金属多孔阵列结构的毛细性能实验

易天浩1，加欢1，林奕霖1，汪彬2，姜梦怡1，吴静怡1，杨光1，*   

  1. 1.上海交通大学 制冷与低温工程研究所，上海200240
    2.上海宇航系统工程研究所，上海201109
  • 收稿日期:2023-11-24 修回日期:2024-01-04 录用日期:2024-02-05 发布日期:2025-03-13 出版日期:2025-04-01

Experiment on capillary performance of metal porous array structure

YI Tianhao1， JIA Huan1， LIN Yilin1， WANG Bin2， JIANG Mengyi1， WU Jingyi1， YANG Guang1，*   

  1. 1.Institute of Refrigeration and Cryogenics， Shanghai Jiao Tong University， Shanghai 200240， China
    2.Aerospace System Engineering Shanghai， Shanghai 201109， China
  • Received:2023-11-24 Revision received:2024-01-04 Accepted:2024-02-05 Online:2025-03-13 Published:2025-04-01

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摘要： 多孔结构中液体的毛细流动性能是决定微重力条件下液体推进剂能否稳定获取的主要因素之一。通过3D打印制备微柱间距范围50~110μm的多层不锈钢多孔阵列结构，借助显微镜对其内部结构和表面形貌进行表征，采用红外热像仪记录HFE7500、无水乙醇和乙二醇等工质在多孔阵列结构内的动态毛细爬升过程，得到了不同液体的毛细爬升曲线，进一步分析得到多孔阵列结构的毛细性能参数。结果表明，在微柱间距50~110μm范围内，随着微柱间距增大，其孔隙率不断增大，毛细爬升速度越快且最终爬升高度越大，微柱间距110μm的最大爬升高度是微柱间距50μm的最大爬升高度的2.34倍左右；对于同一多孔阵列结构，无水乙醇的毛细爬升速度最大，其次分别为HFE7500和乙二醇。多孔阵列结构微柱间距越大，毛细性能因子越大，微柱间距110μm的多孔阵列结构具有最佳的综合毛细性能。本研究为多孔结构气液分离装置的设计提供了参考。

关键词: 液体管理, 多孔阵列结构, 孔隙率, 微柱间距, 毛细爬升

Abstract: The capillary performance of porous structure is one of the main factors that determine whether the liquid propellant can be obtained stably in the storage tank under microgravity. The multilayer stainless porous array structure whose microcolumn distance ranges from 50μm to 110μm was prepared through 3D printing. The internal structure and surface morphology of the porous array structure are observed with the X-ray microscope and scanning electron microscope.The capillary rising process in the porous array structure is investigated with the infrared camera by using HFE7500， ethanol， and ethylene glycol as the working fluids. The capillary performance parameters are obtained through the capillary rising curves. The results show that the porosity of the porous array structure increases as the microcolumn distance increases. Besides， a larger microcolumn distance leads to a faster rising velocity and a larger rising height. The maximum rising height of a porous array structure with a microcolumn distance of 110μm is 2.34 times that of a porous array structure with a microcolumn distance of 50μm. For the same porous array structure， the rising velocity with the ethanol is the highest， followed by HFE7500 and ethylene glycol， respectively. Moreover， the capillary performance factor increases as the microcolumn distance increases， indicating that the porous array structure with a microcolumn distance of 110μm has the best comprehensive capillary performance. The results provide a reference for the design of porous structure liquid acquisition device.

Key words: liquid management, porous array structure, porosity, microcolumn distance, capillary rise