中国物理B ›› 2020, Vol. 29 ›› Issue (6): 64702-064702.doi: 10.1088/1674-1056/ab8624

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Discharge and flow characterizations of the double-side sliding discharge plasma actuator

Qi-Kun He(贺启坤), Hua Liang(梁华), Bo-Rui Zheng(郑博睿)   

  1. 1 Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China;
    2 School of Automation and Information, Xi'an University of Technology, Xi'an 710048, China
  • 收稿日期:2019-12-30 修回日期:2020-03-14 出版日期:2020-06-05 发布日期:2020-06-05
  • 通讯作者: Hua Liang, Bo-Rui Zheng E-mail:lianghua82702@126.com;narcker@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51607188, 51790511, and 51906254) and the Foundation for Key Laboratories of National Defense Science and Technology of China (Grant No. 614220202011801).

Discharge and flow characterizations of the double-side sliding discharge plasma actuator

Qi-Kun He(贺启坤)1, Hua Liang(梁华)1, Bo-Rui Zheng(郑博睿)2   

  1. 1 Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038, China;
    2 School of Automation and Information, Xi'an University of Technology, Xi'an 710048, China
  • Received:2019-12-30 Revised:2020-03-14 Online:2020-06-05 Published:2020-06-05
  • Contact: Hua Liang, Bo-Rui Zheng E-mail:lianghua82702@126.com;narcker@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 51607188, 51790511, and 51906254) and the Foundation for Key Laboratories of National Defense Science and Technology of China (Grant No. 614220202011801).

摘要: We investigate the discharge and flow characterizations of a double-side siding discharge plasma actuator driven by different polarities of direct current (DC) voltage. The discharge tests show that sliding discharge and extended discharge are filamentary discharge. The irregular current pulse of sliding discharge fluctuates obviously in the first half cycle, ultimately expands the discharge channel. The instantaneous power and average power consumptions of sliding discharge are larger than those of the extended discharge and dielectric barrier discharge (DBD). The flow characteristics measured by a high-frequency particle-image-velocimetry system together with high-speed schlieren technology show that the opposite jet at the bias DC electrode is induced by sliding discharge, which causes a bulge structure in the discharge channel. The bias DC electrode can deflect the direction of the induced jet, then modifying the properties of the boundary layer. Extended discharge can accelerate the velocity of the starting vortex, improving the horizontal velocity profile by 203%. The momentum growth caused by extended discharge has the largest peak value and the fastest growth rate, compared with sliding discharge and DBD. However, the momentum growth of sliding discharge lasts longer in the whole pulsed cycle, indicating that sliding discharge can also inject more momentum.

关键词: plasma, double-side sliding discharge, induced velocity, induced vortex, momentum analysis

Abstract: We investigate the discharge and flow characterizations of a double-side siding discharge plasma actuator driven by different polarities of direct current (DC) voltage. The discharge tests show that sliding discharge and extended discharge are filamentary discharge. The irregular current pulse of sliding discharge fluctuates obviously in the first half cycle, ultimately expands the discharge channel. The instantaneous power and average power consumptions of sliding discharge are larger than those of the extended discharge and dielectric barrier discharge (DBD). The flow characteristics measured by a high-frequency particle-image-velocimetry system together with high-speed schlieren technology show that the opposite jet at the bias DC electrode is induced by sliding discharge, which causes a bulge structure in the discharge channel. The bias DC electrode can deflect the direction of the induced jet, then modifying the properties of the boundary layer. Extended discharge can accelerate the velocity of the starting vortex, improving the horizontal velocity profile by 203%. The momentum growth caused by extended discharge has the largest peak value and the fastest growth rate, compared with sliding discharge and DBD. However, the momentum growth of sliding discharge lasts longer in the whole pulsed cycle, indicating that sliding discharge can also inject more momentum.

Key words: plasma, double-side sliding discharge, induced velocity, induced vortex, momentum analysis

中图分类号:  (Vortex dynamics)

  • 47.32.C-
47.65.Md (Plasma dynamos) 52.30.-q (Plasma dynamics and flow) 52.50.Nr (Plasma heating by DC fields; ohmic heating, arcs)