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锂铅实验回路是研究聚变堆液态金属锂铅包层关键科学技术问题的必备装置,其锂铅温度场和速度场分布对分析相关实验结果是必需的。DRAGON-I是中国第一座热对流锂铅实验回路,采用FLU-ENT软件对该回路中液态锂铅的温度场和速度场进行了二维和三维模拟分析。结果表明:回路内锂铅温度场分布符合回路设计时的温度变化要求,并在回路管径截面上变化很小;锂铅速度除了在回路上端两个直拐角处波动较大外,其余管道直段波动非常小,平均速度约0.14 m/s。
The experimental circuit of lithium lead is an indispensable device to study the key science and technology issues of the liquid metal lithium lead cladding in fusion reactor. The temperature and velocity distribution of lithium lead are necessary to analyze the related experimental results. DRAGON-I is the first experimental circuit for thermal convection lithium lead in China. The temperature field and velocity field of liquid lithium lead in this circuit were simulated by FLU-ENT software in two-dimensional and three-dimensional models respectively. The results show that the distribution of lithium-lead temperature in the circuit meets the requirements of the circuit design temperature and has little change in the cross-section of the pipe diameter. In addition to the rapid fluctuations of the lithium-lead speed at the two straight corners at the upper end of the circuit, The segment fluctuates very little with an average speed of about 0.14 m / s.