期刊
EXPERIMENTS IN FLUIDS
卷 58, 期 4, 页码 -出版社
SPRINGER
DOI: 10.1007/s00348-016-2295-5
关键词
-
资金
- Air Force Research Laboratory and Innovative Scientific Solutions, Inc. [SB20181]
A Quasi-DC (Q-DC) electrical discharge generates a highly transient filamentary plasma in high-speed airflow. Major specific properties of this type of discharge are realized due to a strong coupling of the plasma to the moving gas. The plasma, supplied by a DC voltage waveform, demonstrates a pulsed-periodic pattern of dynamics significantly affecting the flow structure. In this study, the dynamics and plasma parameters of the Q-DC discharge are analyzed in the Supersonic Test Rig (SBR-50) at the University of Notre Dame at Mach number M = 2, stagnation pressure P-0 = (0.9-2.6) x 10(5) Pa, stagnation temperature T-0 = 300 K, unit Reynolds number Re-L = 7-25 x 10(6) -m(-1), and plasma power W-pl = 3-21 kW. The plasma parameters are measured with current-voltage probes and optical emission spectroscopy. An unsteady pattern of interaction is depicted by high-speed image capturing. The result of the plasma-flow interaction is characterized by means of pressure measurements and schlieren visualization. It is considered that the Q-DC discharge may be employed for active control of duct-driven flows, cavity-based flow, and for effective control of shock wave-boundary layer interaction.
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