液氢增压过程超临界动态转变热物性实验研究  

Experimental study on thermophysical properties of supercritical dynamic transition in liquid hydrogen pressurization process

作　　者：张春伟 宋坤 余海帅 郭嘉翔 陈静[1] 李山峰[1] Zhang Chunwei;Song Kun;Yu Haishuai;Guo Jiaxiang;Chen Jing;Li Shanfeng(Beijing Institute of Aerospace Testing Technology,Beijing 100074,China;Academy of Aerospace Propulsion Technology,Xian 710100,China)

机构地区：[1]北京航天试验技术研究所,北京100074 [2]航天推进技术研究院,西安710100

出　　处：《低温工程》2025年第2期1-8,共8页Cryogenics

基　　金：国家自然科学基金(52306020);工信部民用飞机专项科研项目:氢能源支线飞机总体设计与技术验证(MJG2-2N22)。

摘　　要：通过测试液氢储罐内部的压力和温度场信息,实现超临界转变过程氢物性的间接测量,同时对增压氢气的温度和压力影响进行分析。结果表明,在超临界区域,温度和压力的微弱变化也会导致氢热物性发生较大改变。当温度保持不变而压力增加时,密度、比热容、导热和黏度等参数都有增加的趋势;但当压力保持不变而温度增加时,液氢储罐底部的过冷区域热物性差异较小,而顶部超临界区域物性差异较大。The indirect measurement of hydrogen physical properties during the supercritical transition process was realized by testing the pressure and temperature field information inside the liquid hydrogen storage tank,and the influence of temperature and pressure on pressurized hydro-gen was analyzed.The results show that in the supercritical region,the slight change of tempera-ture and pressure will lead to the great change of hydrogen thermophysical properties.When the temperature remains constant and the pressure increases,the density,specific heat,thermal con-ductivity and viscosity all increase.However,when the pressure remains constant and the temper-ature increases,the difference in thermophysical properties of the supercooled area at the bottom of the liquid hydrogen storage tank is small,while the difference in properties of the supercritical area at the top is large.

关 键 词：液氢 增压 超临界转变 热物性参数 

分 类 号：TB612[一般工业技术—制冷工程]