Static profiles of capillary surfaces in the annular space between two coaxial cones under microgravity  

微重力下同轴旋转体间稳态液面轮廓

作　　者：Wen Li Di Wu Yong Li Shuyang Chen Fenglin Ding Qi Kang Shangtong Chen 李文;吴笛;李永;陈舒扬;丁凤林;康琦;陈上通

机构地区：[1]Beijing Institute of Control Engineering,China Academy of Space Technology,Beijing 100094,China [2]Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [3]College of Engineering and Science,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Acta Mechanica Sinica》2024年第9期1-9,共9页力学学报（英文版）

基　　金：supported by the China Manned Space Engineering Program(Fluid Physics Experimental Rack and the Priority Research Program of Space Station);the Natural Science Foundation Project(Grant No.12032020).

摘　　要：In space,surface tension plays an important role and liquid behaviour is much different from that on the ground.The static capillary surfaces in the annular space between two coaxial cones under microgravity are studied in this paper.Theoretical expressions of the capillary surfaces are derived and a procedure is developed to predict the capillary surfaces based on the expressions.By considering various liquid contact angles,liquid volumes,and container geometries,numerical simulation with the volume of fluid method is carried out and microgravity experiments in Beijing Drop Tower are performed.The numerical and experimental results are in good agreement with theoretical predictions.Furthermore,capillary surfaces in an annulus with constant cross-section and in a spherical tank with a central column are also discussed.z3 will decrease obviously with the increase of the liquid contact angle.The theoretical models and findings will be great helpful for liquid management in space and the evaluation of propellant residue.在太空中,由于表面张力发挥着重要作用,液体的行为与地面上有很大不同.本文研究了微重力下两个同轴旋转体之间的静态液面,推导出了液面轮廓的理论表达式,并开发了基于该表达式的快速预测液面轮廓的程序.通过考虑不同的液体接触角、液体体积和容器几何形状,采用有限体积法进行了数值模拟,并在北京落塔中进行了微重力实验,数值和实验结果与理论预测吻合良好.此外,还讨论了恒截面环形空间中和含中心柱贮箱内的稳态液面.液体在外壁面上的爬升高度会随着液体接触角的增大而明显减小.本文的理论模型和成果将对空间液体管理和液态推进剂剩余量的评估有很大帮助.

关 键 词：Capillary surface Coaxial cones Drop tower MICROGRAVITY Shooting method 

分 类 号：O17[理学—数学]