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。
A direct simulation of 3D liquid metal flow in the DCLL （Dual Coolant Lead Lithium） blanket is conducted to study the distribution of velocity, MHD pressure drop and current stream lines influenced by different material properties of FCI （Flow Channel Insert）. A consistent and conservative scheme and projection method on a collocated mesh are employed to solve the incompressible Navier-Stokes equations with the Lorentz force included based on an electrical potential formula. As an illustration, three blanket flows have been considered： liquid metal flow in a channel without FCI, with a silicon carbide FCI and with a FCI made of conductive material. It is shown that liquid metal flows in blanket with FCI are 3D developing flows. It is verified that： MHD pressure drop can be reduced by using silicon carbide FCI. Due to the leakage of current circuit across the slot, with PES opened at one side wall, a strong reversed velocity is observed in PES.
参考文献
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