介绍了超声速非平衡电离磁流体动力技术实验系统的设计思想和组成,设计、制作了马赫数为3.5的吸气式双喉道风洞,采用以陶瓷板为阻挡介质的电容耦合射频阻挡放电,实现了超声速流场中大体积、连续、稳定、均匀等离子体的产生.主要结论有:实验测试风洞稳定工作时间为18s,稳定运行时实验段静压为650Pa;电容耦合射频放电典型工作状态下,通过伏安诊断法测出超声速条件下等离子体的电导率为1.27×10-3S/m. The design idea and composition of the experimental system of supersonic unbalanced ionization magnetic fluid dynamic technology are introduced. The aspiration dual throat tunnel with Mach number of 3.5 is designed and fabricated. The capacitive coupling RF blocking discharge with ceramic plate as the blocking medium is adopted. The main conclusions are as follows: the stable working time of the experimental wind tunnel is 18s and the static pressure of the experimental section is 650Pa during the steady operation; the typical working state of capacitively coupled radio frequency discharge Under the condition of supersonic velocity, the conductivity of the plasma was 1.27 × 10 -3 S / m measured by voltammetry.