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实验研究了通道插件(FCI)压力平衡孔(PEH)和压力平衡狭缝(PES)结构、绝缘和非绝缘材质对磁流体动力学(MHD)效应的影响，结果表明：带PEH或PES、绝缘或非绝缘材质的FCI产生的流速分布有很大的差异；对MHD压降而言，FCI结构PEHs或PES差异的影响大于FCI绝缘或非绝缘材质差异引起的影响；对流速分布而则刚好相反。二次流引起的局部流速骤增的MHD效应(简称为S-MHD效应)对控制管道内流速分布和降低MHD压降有作用，这些实验结果为弄清FCI的MHD效应机制和液态金属包层设计提供了实验认知与有价值的参考。

Experimental investigation on MHD effects due to different FCI's structures and conductivities

The experimental investigation of the MHD effects for the flow channel inserter (FCI) due to the different structures and the different conductivities of the FCIs is presented. The FCIs are electric insulator / electric conductivity with the pressure equalization holes (PEH) / the pressure equalization slot (PES). The experimental results showed that there are a significant different on the velocity distribution and MHD pressure drop for the different structures and the different conductivities of the FCIs. It is also indicated that FCI with PEH is better than with PES on reducing MHD pressure drop and controlling velocity distribution in the duct with FCI. FCI MHD effects can be understood with the secondary flow MHD effect (short in “S-MHD”). The S-MHD effects also can be used to control the fluid structure and MHD pressure drop. These experimental data is useful for understanding the mechanism of FCI to reduce MHD pressure drop and for supplying the technical reference of liquid metal blanket system design.