磁补偿微重力环境实现及磁流体微重力内角流动研究  

Realization of microgravity environment by magnetic compensation and study on interior corner flow of magnetic fluid in microgravity

作　　者：沈逸 张泽宇 梁益涛 黄永华[1] 耑锐 张亮 卜劭华 SHEN Yi;ZHANG Zeyu;LIANG Yitao;HUANG Yonghua;ZHUAN Rui;ZHANG Liang;BU Shaohua(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Aerospace System Engineering Institute,Shanghai 201108,China)

机构地区：[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201108

出　　处：《化工学报》2020年第8期3490-3499,共10页CIESC Journal

基　　金：上海航天先进技术联合研究基金项目(USCAST2019-4);航天低温推进剂技术国家重点实验室开放课题(SKLTSCP202005);国家自然科学基金项目(51676118)。

摘　　要：由于表面张力的作用,流体在微重力环境中沿一定夹角的内角壁面爬升过程与常重力状态不同。为了对微重力内角流动的物理过程进行研究,利用磁补偿方法搭建了常温磁流体微重力补偿实验台,实现了目标区域内纵向小于5%非均匀度的磁补偿微重力环境。并对不同重力条件下水基磁流体沿若干材料内角爬升过程进行了可视化实验研究,探究了微重力环境下流体与材料间的接触角以及内角角度对液体导流性能的影响以及毛细流动规律。结果表明,在满足Concus-Finn条件时,液面爬升高度和重力加速度近似呈反比关系。接触角和内角角度越小,流体输运能力越强,且重力水平越低,越为明显。当不满足Concus-Finn条件时,液面爬升高度和重力加速度近似呈线性关系,接触角和内角角度对流体输运能力的影响并不明显。Due to the effect of surface tension,the process of fluid climbing along the inner wall at a certain angle in the microgravity environment is different from that of normal gravity.To study the physical process of capillary flow in microgravity,this paper uses the magnetic compensation method to set up a normal temperature magnetic fluid microgravity compensation experimental platform,which achieves magnetic compensation of less than 5%nonuniformity longitudinally in the target area.Visualized experimental research on the climb process of water-based magnetic fluid along the interior corner of different materials under the condition of different gravity is performed to verify the influence of contact angle and interior corner angle on the fluid transport capacity in the microgravity environment and to reveal the capillary flow law of the magnetic fluid in the microgravity environment.The results show that when the Concus-Finn condition is satisfied,the liquid surface climbing height and the gravity acceleration are approximately inversely proportional.The smaller the contact angle and interior corner angle,the stronger the fluid transport capacity of the material,especially in a good microgravity environment.When the Concus-Finn condition is not satisfied,the liquid surface climbing height and the acceleration of gravity have a linear relationship,and the impact of changes in contact angle and interior corner angle on the fluid transport capacity is not obvious.

关 键 词：微重力 毛细流动 磁补偿 水基磁流体 接触角 内角 

分 类 号：V511.61[航空宇航科学与技术—航空宇航推进理论与工程] O361[理学—流体力学]