Investigation of MHD power generation with supersonic non-equilibrium RF discharge

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• 作者：Pengyu Yang^a ; ^b ; ^{xiaoyu182444840@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Bailing Zhang^a ; ^{zhangbailing2468@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yiwen Li^a ; ^c ; ^{lee_yiwen@163.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yutian Wang^a ; Chengduo Duan^a ; Hao Fan^a ; Ling Gao^a
• 关键词：Magnetohydrodynamic ; Non-equilibrium plasma ; Power generation ; Radio frequency discharge ; Supersonic flow
• 刊名：Chinese Journal of Aeronautics
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：29
• 期：4
• 页码：855-862
• 全文大小：1886 K

文摘

Magnetohydrodynamic (MHD) power generation with supersonic non-equilibrium plasma is demonstrated. Capacitively coupled radio frequency (RF) discharge (6 MHz, maximum continual power output of 200 W) was adopted to ionize the Mach number 3.5 (650 m/s), 0.023 kg/m³ airflow. In a MHD channel of 16 mm × 10 mm × 20 mm, MHD open voltage of 10 V is realized in the magnetic field of 1.25 T, and power of 0.12 mW is extracted steadily and continuously in the magnetic field of 1 T. The reasons for limited power generation are proposed as: low conductivity of RF discharge; large touch resistance between MHD electrode and plasma; strong current eddies due to flow boundary layer. In addition, the cathode voltage fall is too low to have obvious effects on MHD power generation.