充注率及氦气增压对低温贮箱热分层特性影响  

Effects of Filling Rate and Helium Pressurization on the Thermal Stratification Behavior of Cryogenic Tank

作　　者：汪彬[1] 黄永华[1] 吴静怡[1] 王天祥 雷刚 WANG Bin1, HUANG Yong-Hua1, WU Jing-Yi1, WANG Tian-Xiang2, LEI Gang2(1. Institute of Refrigeration and Cryogenics, Shanghai diao Tong University, Shanghai 200240, China; 2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 10028, Chin)

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]航天低温推进剂技术国家重点实验室,北京100028

出　　处：《工程热物理学报》2018年第8期1656-1660,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51676118);航天先进技术联合研究中心项目(No.USCAST2016-32)

摘　　要：为了揭示低温推进剂贮箱的增压规律和热分层特性,在以液氮为贮存介质的低温流体高效贮存平台上,进行了不同充注率下的贮箱自增压及氦气增压实验。得到充注率分别为35%,50%和65%时的贮箱增压速率分别为7.54 kPa·h^(-1),13.02 kPa·h^(-1)和28.26 kPa·h^(-1).获得了达到相同压力水平时各自充注率对应的温度分布,分析了不同充注率时贮箱温度梯度的变化规律。最后使用常温氦气作为增压气体,将贮箱充注率为50%的贮箱分别增压到180 kPa,380 kPa和580kPa,分析了氦气充注过程及达到不同压力水平时贮箱内温度分布变化规律.In order to discover the pressurization and thermal stratification behavior of cryogenic propellant tank, experimental investigation on a liquid nitrogen （LN2） tank with the volume of 1.31 m^3was conducted on the Efficient Cryogenic Fluid Storage Platform （ECFSP）, which concentrates on the effects of filling rate and gaseous helium （GHe） pressurization on the thermal stratification performance of LN2. The pressurization rates without GHe at fill rate of 35%, 50% and 65% were measured as 7.54 kPa·h^-1, 13.02 kPa·h^-1 and 28.26 kPa·h^-1, respectively. The temperature profiles were obtained at the absolute pressure of 180 kPa and the temperature gradients variation at axial and radial directions were analyzed. The LN2 tank at fill level of 50% was pressurized to 180 kPa, 380 kPa and 580 kPa, respectively, with room-temperature （293 K） GHe as the pressurant gas. The influences of helium pressurization process and pressurization level on tank temperature profile were also studied.

关 键 词：低温推进剂 自增压 热分层 实验研究 

分 类 号：V511.6[航空宇航科学与技术—航空宇航推进理论与工程]