U型耦合管道内液态金属MHD效应研究  

Numerical analysis of liquid metal MHD effects in U-turn duct

作　　者：吕欣婷 张秀杰[1] 王磊 孙振超[1] 赵耀 LU Xin-ting;ZHANG Xiu-jie;WANG Lei;SUN Zhen-chao;ZHAO Yao(Southwestern Institute of Physics,Chengdu 610041)

机构地区：[1]核工业西南物理研究院,成都610041

出　　处：《核聚变与等离子体物理》2024年第4期373-379,共7页Nuclear Fusion and Plasma Physics

基　　金：四川省科技计划(2019YJ0297);四川省自然基金(2022NSFSC1220);国家自然科学基金(12275069)。

摘　　要：针对液态包层中常见的U型导电耦合管道内液态金属三维磁流体动力学(MHD)流动,利用自主开发的低磁雷诺数下液态金属磁流体流动的计算程序,获得了外加磁场和流体管道在不同倾斜角工况下管道内液态金属的流速、感应电流和压力分布。结果表明,U型耦合管道内液态金属的MHD流动中耦合段的耦合效应使MHD压降明显增大,是相同参数下单根管道内压降的2.4倍左右。在U型耦合管流动转向处,部分中心流体区产生与初始流向相反的逆流流速分布,而此处的磁流体压力梯度随外加磁场倾角的增大而增大,但在初始增加倾角时,压力梯度会略微减小。Numerical simulations on the three-dimensional(3D)magnetohydrodynamic(MHD)flow of liquid metal in a U-turn duct with conducting walls was carried out by using a self-developed program under the low magnetic Reynolds number.The velocity,induced current,and pressure distributions in the U-turn duct were obtained under the magnetic field with different incline angles.The results show that the pressure drop in the U-turn coupling duct is about 2.4 times compared with the single duct under the same conditions due to the strong MHD coupling effect.A reversal flow appears in the part of the core fluid region at the flow turn of the ducts,which may adversely affect the heat transfer of the liquid blankets.In addition,the pressure gradient increases with the incline angles,but it decreases slightly when the inclination is initially increased.

关 键 词：液态金属 耦合MHD效应 倾斜磁场 压降 U型导电管道 

分 类 号：TL627[核科学技术—核技术及应用]