高温包层内多层插件流道内液态铅锂MHD流动数值分析

Numerical Analysis of Liquid PbLi Magnetohydrodynamic in Multi-Layer Flow Channel Inserts

包层是聚变反应堆能量转换和提取的关键部件,聚变高温制氢堆(FDS-Ⅲ)高温液态铅锂包层(HTL)中采用创新型多层插件(MFCI)技术,由SiC_f/SiC组成的流道插件使液态铅锂实现了1 000℃左右出口温度,从而达到更高的热电转换效率和制氢能力。液态金属磁流体动力学效应MHD效应是HTL包层的重点问题之一。本文以高温包层结构为参考,采用FDS团队自主开发的磁流体动力学与热工水力学耦合模拟软件MTC,对高哈特曼数下典型多层插件流道内的液态铅锂MHD流动特性进行了数值模拟,分析了不同插件电导率对流道之间电磁耦合现象的影响。

Fusion blanket is a key component for energy transformation and extraction in fusion reactor.In high temperature liquid metal blanket（HTL） of fusion-based hydrogen production reactor（named FDS-Ⅲ）,the multilayer flow channel inserts（MFCI） are used.The flow channel insert（FCI） made of a silicon carbide composite（SiCf/SiC） ensure the PbLi outlet temperature can achieve around 1 000℃,therefore the blanket can get high efficient production of hydrogen and thermoelectric conversion.In HTL,the magnetohydrodynamic（MHD） effect is a key issues of concern.In this work,the special geometry of the HTL was considered,the Magnetic Thermohydraulics Coupling Code（MTC） was used to analyze the characteristics of PbLi MHD flow when the FCI electrical conductivities are various,and the electromagnetic coupling of multilayer flow channel was discussed.