Direct simulation of MHD flows in dual-coolant liquid metal fusion blanket using a consistent and conservative scheme

Direct simulation of 3-D MHD(magnetohydrodynamics) flows in liquid metal fusion blanket with flow channel insert(FCI) has been conducted.Two kinds of pressure equilibrium slot (PES) in FCI,which are used to balance the pressure difference between the inside and outside of FCI,are considered with a slot in Hartmann wall or a slot in side wall,respectively.The velocity and pressure distribution of FCI made of SiC/SiC_f are numerically studied to illustrate the 3-D MHD flow effects,which clearly show that the flows in fusion blanket with FCI are typical three-dimensional issues and the assumption of 2-D fully developed flows is not the real physical problem of the MHD flows in dual-coolant liquid metal fusion blanket.The optimum opening location of PES has been analyzed based on the 3-D pressure and velocity distributions.

液态包层流动通道插件三维MHD效应数值模拟

用直接数值方法对高效液态锂铅包层内的金属流体三维MHD效应进行分析。用投影法对包含洛仑兹力源项的不可压Navier-Stokes方程求解,用相容守恒格式计算电磁力。研究了不同材料的流动通道插件(FCI)对金属磁流体流速、MHD压降和电流流线分布的影响。主要分析了以下三种情况:无FCI插件的通道内的流动状况;加入绝缘材料(碳化硅)的FCI插件的通道内的流动状况;加入导电材料制成的FCI插件的通道内的流动状况。验证了包层内部通过加入绝缘的FCI可以有效地降低金属磁流体的MHD压降。对于绝缘FCI压力平衡槽位于侧层的情况,由于压力平衡槽内部电流密度较大,在压力平衡槽位置,有很大的逆流出现。