中国物理B ›› 2019, Vol. 28 ›› Issue (7): 75202-075202.doi: 10.1088/1674-1056/28/7/075202

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

Characteristics and underlying physics of ionic wind in dc corona discharge under different polarities

Tongkai Zhang(张桐恺), Yu Zhang(张宇), Qizheng Ji(季启政), Ben Li(李犇), Jiting Ouyang(欧阳吉庭)   

  1. 1 National Key Laboratory of Mechatronic Engineering and Control, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China;
    2 School of Physics, Beijing Institute of Technology, Beijing 100081, China;
    3 Beijing Orient Institute of Measurement and Test, Beijing 100094, China
  • 收稿日期:2019-02-27 修回日期:2019-04-17 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Ben Li, Jiting Ouyang E-mail:liben0316@163.com;jtouyang@bit.edu.cn
  • 基金资助:

    Project supported by China Postdoctoral Science Foundation (Grant No. 3020036721801) and Electrostatic Research Foundation of Liu Shanghe Academicians Experts Workstation, Beijing Orient Institute of Measurement and Test, China (Grant No. BOIMTLSHJD20181005).

Characteristics and underlying physics of ionic wind in dc corona discharge under different polarities

Tongkai Zhang(张桐恺)2, Yu Zhang(张宇)3, Qizheng Ji(季启政)3, Ben Li(李犇)1, Jiting Ouyang(欧阳吉庭)2   

  1. 1 National Key Laboratory of Mechatronic Engineering and Control, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China;
    2 School of Physics, Beijing Institute of Technology, Beijing 100081, China;
    3 Beijing Orient Institute of Measurement and Test, Beijing 100094, China
  • Received:2019-02-27 Revised:2019-04-17 Online:2019-07-05 Published:2019-07-05
  • Contact: Ben Li, Jiting Ouyang E-mail:liben0316@163.com;jtouyang@bit.edu.cn
  • Supported by:

    Project supported by China Postdoctoral Science Foundation (Grant No. 3020036721801) and Electrostatic Research Foundation of Liu Shanghe Academicians Experts Workstation, Beijing Orient Institute of Measurement and Test, China (Grant No. BOIMTLSHJD20181005).

摘要:

During a dc corona discharge, the ions' momentum will be transferred to the surrounding neutral molecules, inducing an ionic wind. The characteristics of corona discharge and the induced ionic wind are investigated experimentally and numerically under different polarities using a needle-to-ring electrode configuration. The morphology and mechanism of corona discharge, as well as the characteristics and mechanism of the ionic wind, are different when the needle serves as cathode or anode. Under the different polarities of the applied voltage, the ionic wind velocity has a linear relation with the overvoltage. The ionic wind is stronger but has a smaller active region for positive corona compared to that for negative corona under a similar condition. The involved physics are analyzed by theoretical deduction as well as simulation using a fluid model. The ionic wind of negative corona is mainly affected by negative ions. The discharge channel has a dispersed feature due to the dispersed field, and therefore the ionic wind has a larger active area. The ionic wind of positive corona is mainly affected by positive ions. The discharge develops in streamer mode, leading to a stronger ionic wind but a lower active area.

关键词: corona discharge, ionic wind, electrode polarity

Abstract:

During a dc corona discharge, the ions' momentum will be transferred to the surrounding neutral molecules, inducing an ionic wind. The characteristics of corona discharge and the induced ionic wind are investigated experimentally and numerically under different polarities using a needle-to-ring electrode configuration. The morphology and mechanism of corona discharge, as well as the characteristics and mechanism of the ionic wind, are different when the needle serves as cathode or anode. Under the different polarities of the applied voltage, the ionic wind velocity has a linear relation with the overvoltage. The ionic wind is stronger but has a smaller active region for positive corona compared to that for negative corona under a similar condition. The involved physics are analyzed by theoretical deduction as well as simulation using a fluid model. The ionic wind of negative corona is mainly affected by negative ions. The discharge channel has a dispersed feature due to the dispersed field, and therefore the ionic wind has a larger active area. The ionic wind of positive corona is mainly affected by positive ions. The discharge develops in streamer mode, leading to a stronger ionic wind but a lower active area.

Key words: corona discharge, ionic wind, electrode polarity

中图分类号:  (Glow; corona)

  • 52.80.Hc
52.65.-y (Plasma simulation) 52.40.Kh (Plasma sheaths)