摘要
为深入了解挡波板对液氢气瓶内流体晃动行为影响,通过建立的非等温二维车载液氢气瓶数值模型,对晃动条件下挡波板对内筒体腔室内的热力学特性进行了数值模拟。研究结果表明:晃动过程中挡波板对内筒体腔室内液位、压力和温度都有显著影响。晃动能够增加内筒体腔室内气-液相的接触面积,促进热量交换,破坏初始时的热分层,导致压力和温度下降。但挡波板减少了液体在内筒体腔室内的晃动幅度,晃动过程中的压力和温度高于没有挡波板内筒体腔室内的压力和温度,且前0.5 s内压力和温度下降速率最大。此外挡波板还在一定程度上起到“热桥”作用,在挡波板周围区域会形成一定的高温区。
In order to understand the influence of the baffle on the sloshing behavior of the fluid in the liquid hydrogen cylinder,the thermodynamic characteristics of the baffle on the inner cylinder chamber under shaking conditions were numerically simulated by the established numerical model of the non-isothermal two-dimensional vehicle-mounted liquid hydrogen cylinder.The results show that the baffle has a significant effect on the liquid level,pressure and temperature in the inner cylinder chamber during the shaking process.Shaking increases the contact area of the gas-liquid phase in the inner cylinder chamber,promotes heat exchange,destroys the initial thermal stratification,and causes pressure and temperature to drop.However,the bafle reduces the shaking amplitude of the liquid in the inner cylinder chamber,and the pressure and temperature in the shaking process are higher than those in the cylinder chamber without the baffle,and the pressure and temperature drop rate is the largest in the first O.5 s.In addition,the baffle also plays the role of a"thermal bridge"to a certain extent,and a certain high temperature area will be formed in the area around the baffle.
作者
姜悦
丁华
郝朝阳
李沐泽
陶昶景
Jiang Yue;Ding Hua;Hao Zhaoyang;Li Muze;Tao Chanjing(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212000,China)
出处
《低温与超导》
CAS
北大核心
2024年第10期37-43,55,共8页
Cryogenics and Superconductivity
基金
国家重点研发计划(2020YFB1506203)
张家港市科技计划项目(ZKYY2231)资助。
关键词
车载:液氢气瓶
晃动
挡波板
相变
数值仿真
Vehicle-mounted
Liquid hydrogen tank
Sloshing
Slosh baffles
Phase change
Numerical simulation
