摘要
建立了大空间液氢射流泄漏三维非稳态CFD数值计算模型,开展了泄漏扩散规律研究。并对比研究了静风与顺风条件下,液氢射流泄漏所产生氢气云团的运动特性,使用无量纲数对同一时刻流场中不同位置的氢气云团行为进行了分析。结果表明,液氢射流泄漏过程包括自由出流、相变沉降、气云上升和稳定四个阶段。射流体具有较大水平速度时,由于惯性力的作用更显著,浮升力的作用难以体现,氢气云团会贴地运动更长的距离,这也增大了泄漏事故的危害性。
A three-dimensional unsteady CFD numerical calculation model of liquid hydrogen jet leakage in large space was established,and the law of leakage and diffusion was studied.The numerical results reveal that four stages of hydrogen cloud occur,namely free discharge stage,sedimentation stage caused by phase change,ascent stage and stabilization stage.Besides,the hydrogen cloud would move longer distance against the ground because the effect of inertial force was more significant and the effect of buoyancy force was difficult to manifest,which also increased the hazard of spill.
作者
厉劲风
方凯
许好好
李鑫坤
谢军龙
陈建业
LI Jinfeng;FANG Kai;XU Haohao;LI Xinkun;XIE Junlong;CHEN Jianye(Zhejiang Energy Group R&D Institute Co.,Ltd.,Hangzhou 311121,Zhejiang,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)
出处
《化工学报》
EI
CSCD
北大核心
2022年第11期5177-5185,共9页
CIESC Journal
基金
国家自然科学基金项目(52276009)。
关键词
氢
多相流
泄漏
数值模拟
扩散
hydrogen
multiphase flow
leakage
numerical simulation
diffusion
