准静态液态金属锂铅在SLL包层中的流动换热

Flow and heat transfer of quasi-static liquid metal Lithium-Lead in the SLL blanket

依据国际热核聚变实验堆(ITER)的中国单冷准静态液态锂铅实验包层模块(Single-coolant Lithium Lead,SLL),研究液态金属工质锂铅在磁场作用下,不同的第一壁热流密度对缓慢流动的液态锂铅流动和传热特性的影响,为热工水力设计提供参考。研究表明,液态金属处于准静态缓慢流动时,第一壁热流密度的增加使得流道整体的温度有所提高,特别是靠近第一壁的L1流道的温度增加幅度最大;L1流道温度和速度变化剧烈,产生变化较大的感应磁场和感应电流密度,对应的洛伦兹力影响了流动换热。

On the basis of liquid metal LiPb flow in the Single-coolant Lithium Lead-Test Blanket Module （SLL-TBM） system for ITER, the liquid metal flows slowly in a quasi-static way in the magnetic field. Purpose： The effects of liquid metal LiPb flow and heat transfer can provide references for the thermal analysis. Methods： The common software Fluent combined with compiled program was used in the computational simulation for various heat flux of the first wall. Results： The temperature of the whole flow passage increased with rise of the first wall heat flux density, especially that of L1 runner near the first wall. The temperature and velocity of the L1 runner changed prominently, producing larger change of the induction magnetic field and induction current density, and the corresponding Loren magnetic affected the flow and heat exchange. Conclusion： The induction magnetic field and induction current density have influence on the temperature distribution. These results can provide basis for the thermal-hydraulic design.