液氢无排气加注特性模拟研究  

SIMULATION STUDY OF UNVENTED FILLING CHARACTERISTICS OF LIQUID HYDROGEN

作　　者：李建立[1] 耿银良 李敬法 耿金亮 宇波[1] 吴小华[1] Li Jianli;Geng Yinliang;Li Jingfa;Geng Jinliang;Yu Bo;Wu Xiaohua(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Technical Center of China Classification Society Quality Certification Co.,Ltd.,Beijing 100006,China;Oil and Gas Regulation and Control Center of National Petroleum and Natural Gas Pipeline Network Group Co.,Ltd.,Beijing 100013,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102617 [2]中国船级社质量认证有限公司技术中心,北京100006 [3]国家石油天然气管网集团有限公司油气调控中心,北京100013

出　　处：《太阳能学报》2024年第11期747-754,共8页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划(2022YFB4002900)。

摘　　要：为获得对液氢地面无排气加注性能及其影响因素的系统认识,建立二维轴对称液氢无排气加注数值模型,借助Fluent软件研究不同进液温度、进液流量、初始壁温和罐内初始压力对液氢无排气加注特性的影响规律。采用Lee模型和用户自定义程序(UDF)描述液氢在加注中的蒸发、冷凝等相变问题,并考虑气液界面张力。结果表明:在地面加注条件下,液氢储罐内胆中气相空间的压力在加注初期快速升高,然后趋于平稳,到加注后期再次明显增大。当所加入液体温度对应的饱和蒸气压大于容器内部压力时,初期加注将导致闪蒸现象,初始阶段压升显著;进液流量不仅影响加注总时间,还影响加注初期的汽化增压、体系温降程度及加注末期的气氢压缩效应;初始壁温影响加注初期的壁面沸腾增压效应;初始压力对加注初期的压力变化影响较大,当初始压力高于液氢饱和压力时,罐内不发生闪蒸。In order to obtain a systematic understandings of the unvented filling characteristics and the influencing factors of liquid hydrogen on the ground,a two-dimensional axisymmetric numerical model was established.The influences of different inlet temperatures,inlet flow rates,initial wall temperatures,and initial pressures inside the container on the unvented filling characteristics of liquid hydrogen were investigated by using Fluent software.The Lee model and a user-defined function(UDF)were used to describe the phase change issues(evaporation,and condensation)during the unvented filling of liquid hydrogen considering the interfacial tension between gas and liquid.The results show that under normal the gravity conditions,the unvented filling process of liquid hydrogen can be divided into three phases:an initial rapid pressure rise phase,a relatively stable filling phase,and a final rapid pressure rise phase.When the saturated vapor pressure corresponding to the temperature of the added liquid is greater than the pressure inside the vessel,the initial filling will lead to flash evaporation,and the pressure rise in the initial phase is significant.The inlet flow rate affects not only the total filling time,but also the vaporization pressurization at the initial stage of unvented filling,the temperature reduction degree in the system and the compression effect of gaseous hydrogen at the later stage of filling.The initial wall temperature affects the wall boiling pressurization effect during the initial filling stage.The initial pressure has a significant impact on the pressure change during the initial filling period,and the flash evaporation does not occur in the container when the initial pressure is higher than the saturation pressure of liquid hydrogen.

关 键 词：液氢 常重力 无排气加注 加注特性 数值模拟 气相空间压力 

分 类 号：TQ116.27[化学工程—无机化工]