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摘要
Experimental and computational studies of a rail plasma actuator (RailPAc) magnetohydrodynamic flow actuator were performed. The actuator functions by inducing flow around a fast-moving gliding arc, with device current similar to 1000 A, which is generated between flush mounted copper electrodes. High-speed imaging photometry is used to analyze the composition and internal structure of the arc for flush mounted electrode spacings of 2 mm, 5 mm, and 12.5 mm, as well as free-floating electrodes with 12.5 mm spacing. Results are compared with 2D thermal plasma simulations. The dynamics of the arc movement are found to be dependent on the height of the plasma column above the RailPAc surface and on the presence of prominent anode and cathode jets. Mechanisms are proposed for wall-stabilization of the arc and root-jet formation based on agreement between experimental and computational results.
- 出版日期2018-8-8
