摘要
为了更好地选择工质种类以提高液态金属磁流体发电系统中低沸点工质和液态金属两相流输运速度,进行了数值模拟研究.利用CFD仿真软件,分别以三氟三氯乙烷、三氯甲烷作为低沸点工质,液态金属锡和镓作为液态金属工质,模拟低沸点工质受热汽化推动液态金属流动的物理过程,进行两相流模拟仿真研究.通过模拟结果结合理论分析得出工质种类对气液两相流输运特性的影响.结果表明,在满足液态金属不发生倒灌的条件下选择具有较小摩尔质量,较小潜热,较小热容和较大密度的低沸点工质以及具有较大密度,较大热容和较大热导率的液态金属更有利于气液两相流的运输;低沸点工质的沸点和液态金属的熔点应根据应用对象合理选择.
To improve the transport rate of two-phase flow with low-boiling point working medium and liquid metal in liquid metal magneto hydro dynamic （LMMHD） system, the numerical simulation was carried out to choose working fluid. The low-boiling point working mediums of trifluoro-trichloro-ethane and chloroform and the liquid metal of tin and gallium were selected respectively, and the physical process of the liquid metal with low-boiling point working medium vapor was numerically studied by CFD simulation software. Based on the simulation results and theoretical analysis, the effects of working fluid type on the transport characteristics of gas-liquid two-phase flow were discussed. The results show that under the condition of liquid metal without intrusion, the low boiling point working medium with low molecular weight, small latent heat, small heat capacity and high density and the liquid metal with high density, large heat capacity and high heat conductivity are more conducive to transport gas-liquid phase flow. The boiling point of low-boiling point working medium and the melting point of liquid should be chosen according to the application objects.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第4期434-439,共6页
Journal of Jiangsu University：Natural Science Edition
基金
中国博士后科学基金资助面上项目(2015M571747)
基础科研项目(JCKY2013203B003)
中央高校基本科研业务费专项资金资助项目(NS2015017)
南京航空航天大学研究生创新基地开放基金资助项目(kfjj20150202)
关键词
液态金属
两相流输运
低沸点工质
磁流体
数值模拟
liquid metal
two-phase flow transport
low-boiling point working medium
MHD
numerical simulation tWO - metal
