Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

doi:10.1088/1674-1056/25/3/035204

中国物理B ›› 2016, Vol. 25 ›› Issue (3): 35204-035204.doi: 10.1088/1674-1056/25/3/035204

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

Huimin Song(宋慧敏), Min Jia(贾敏), Di Jin(金迪), Wei Cui(崔巍), Yun Wu(吴云)

Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China

收稿日期:2015-05-14 修回日期:2015-11-12 出版日期:2016-03-05 发布日期:2016-03-05
通讯作者: Huimin Song E-mail:min_cargi@sina.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11472306, 51336011, and 51407197).

Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

Huimin Song(宋慧敏), Min Jia(贾敏), Di Jin(金迪), Wei Cui(崔巍), Yun Wu(吴云)

Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China

Received:2015-05-14 Revised:2015-11-12 Online:2016-03-05 Published:2016-03-05
Contact: Huimin Song E-mail:min_cargi@sina.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11472306, 51336011, and 51407197).

摘要/Abstract

摘要： The electric and plasma characteristics of RF discharge plasma actuation under varying pressure have been investigated experimentally. As the pressure increases, the shapes of charge-voltage Lissajous curves vary, and the discharge energy increases. The emission spectra show significant difference as the pressure varies. When the pressure is 1000 Pa, the electron temperature is estimated to be 4.139 eV, the electron density and the vibrational temperature of plasma are 4.71× 10¹¹ cm^-3 and 1.27 eV, respectively. The ratio of spectral lines I_391.4^peak/I_380.5^peak which describes the electron temperature hardly changes when the pressure varies between 5000-30000 Pa, while it increases remarkably with the pressure below 5000 Pa, indicating a transition from filamentary discharge to glow discharge. The characteristics of emission spectrum are obviously influenced by the loading power. With more loading power, both of the illumination and emission spectrum intensity increase at 10000 Pa. The pin-pin electrode RF discharge is arc-like at power higher than 33 W, which results in a macroscopic air temperature increase.

关键词: plasma aerodynamic actuation, optical emission spectrum, plasma flow control, RF discharge

Abstract: The electric and plasma characteristics of RF discharge plasma actuation under varying pressure have been investigated experimentally. As the pressure increases, the shapes of charge-voltage Lissajous curves vary, and the discharge energy increases. The emission spectra show significant difference as the pressure varies. When the pressure is 1000 Pa, the electron temperature is estimated to be 4.139 eV, the electron density and the vibrational temperature of plasma are 4.71× 10¹¹ cm^-3 and 1.27 eV, respectively. The ratio of spectral lines I_391.4^peak/I_380.5^peak which describes the electron temperature hardly changes when the pressure varies between 5000-30000 Pa, while it increases remarkably with the pressure below 5000 Pa, indicating a transition from filamentary discharge to glow discharge. The characteristics of emission spectrum are obviously influenced by the loading power. With more loading power, both of the illumination and emission spectrum intensity increase at 10000 Pa. The pin-pin electrode RF discharge is arc-like at power higher than 33 W, which results in a macroscopic air temperature increase.

Key words: plasma aerodynamic actuation, optical emission spectrum, plasma flow control, RF discharge

中图分类号: (Plasma heating by DC fields; ohmic heating, arcs)

52.50.Nr

52.80.Mg (Arcs; sparks; lightning; atmospheric electricity) 47.80.Jk (Flow visualization and imaging)

宋慧敏, 贾敏, 金迪, 崔巍, 吴云. Electric and plasma characteristics of RF discharge plasma actuation under varying pressures[J]. 中国物理B, 2016, 25(3): 35204-035204.

Huimin Song(宋慧敏), Min Jia(贾敏), Di Jin(金迪), Wei Cui(崔巍), Yun Wu(吴云). Electric and plasma characteristics of RF discharge plasma actuation under varying pressures[J]. Chin. Phys. B, 2016, 25(3): 35204-035204.

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Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

Electric and plasma characteristics of RF discharge plasma actuation under varying pressures

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