In order to solve the problem of single arc plasma actuator’s failure to suppress the boundary layer separation, the effectiveness of the array surface arc plasma actuator to enhance the excitation intensity is verified by experiment. In this study, an electrical parameter measurement system and high-speed schlieren technology were adopted to delve into the electrical, flow field, and excitation characteristics of the high-energy array surface arc plasma actuator under low ambient pressure. The high-energy array surface arc discharge released considerable heat rapidly; as a result, two characteristic structures were generated, i.e., the precursor shock wave and thermal deposition area. The duration increased with the increase in environmental pressure. The lower the pressure, the wider the thermal deposition area’s influence range. The precursor shock wave exhibited a higher propagation speed at the initial phase of discharge; it tended to decay over time and finally remained at 340 m/s. The lower the environmental pressure, the higher the speed would be at the initial phase. High-energy array surface arc plasma actuator can be employed to achieve effective high-speed aircraft flow control.
Bing-Liang Tang(唐冰亮), Shan-Guang Guo(郭善广), Hua Liang(梁华)†, and Meng-Xiao Tang(唐孟潇) Influence of low ambient pressure on the performance of a high-energy array surface arc plasma actuator 2020 Chin. Phys. B 29 105204
Fig. 1.
Schematic diagram of discharge circuit and schlieren system.
Fig. 2.
Schematic diagram of actuator layout (unit: mm).
Fig. 3.
Discharge characteristics: (a) voltage–current waveform, (b) power waveform.
Fig. 4.
Discharge waveforms at different DC voltages: (a) voltage waveform, (b) current waveform.
Fig. 5.
Flow field evolution.
Fig. 6.
Difference of mean gray value in monitoring area.
Fig. 7.
The flow field structure of arc discharge under different pressure: (a) t = 40 μs, (b) t = 440 μs, (c) t = 1080 μs, (d) t = 1680 μs.
Fig. 8.
The flow field structure for different DC voltage under ambient pressure of 20 kPa.
Fig. 9.
The variation of thermal deposition with pressure.
Fig. 10.
The velocity of a shockwave under different pressures.
[1]
Curran E T 2001 J. Propul. Power 17 1138 DOI: 10.2514/2.5875
Liu J H 2014 Investigations of Pulse Discharge Propagation under Varying Gas Pressure Ph.D. Dissertation WuHan Huazhong University of Science and Technology in Chinese DOI: 10.7666/d.D608718
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