中国物理B ›› 2014, Vol. 23 ›› Issue (3): 35201-035201.doi: 10.1088/1674-1056/23/3/035201

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

Investigation on the shockwave induced by surface arc plasma in quiescent air

金迪, 李应红, 贾敏, 李凡玉, 崔巍, 孙权, 张百灵, 李军   

  1. Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, China
  • 收稿日期:2013-07-17 修回日期:2013-09-03 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 51336011) and the National Natural Science Foundation of China (Grant Nos. 51207169 and 51276197).

Investigation on the shockwave induced by surface arc plasma in quiescent air

Jin Di (金迪), Li Ying-Hong (李应红), Jia Min (贾敏), Li Fan-Yu (李凡玉), Cui Wei (崔巍), Sun Quan (孙权), Zhang Bai-Ling (张百灵), Li Jun (李军)   

  1. Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, China
  • Received:2013-07-17 Revised:2013-09-03 Online:2014-03-15 Published:2014-03-15
  • Contact: Jin Di E-mail:james.8653@gmail.com
  • Supported by:
    Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 51336011) and the National Natural Science Foundation of China (Grant Nos. 51207169 and 51276197).

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摘要： The shockwave induced by surface direct-current (DC) arc discharge is investigated both experimentally and numerically. In the experiment, the shockwave generated by rapid gas heating is clearly observed from Schlieren images. The peak velocity of the shockwave is measured to be over 410 m/s; during its upright movement, it gradually falls to about 340 m/s; no remarkable difference is seen after changing the discharge voltage and the pulse frequency. In the modeling of the arc plasma, the arc domain is not simulated as a boundary condition with fixed temperature or pressure, but a source term with a time-varying input power density, which could better reflect the influence of the heating process. It is found that with a reference power density of 2.8×1012 W/m3, the calculated peak velocity is higher than the measured one, but they quickly (in 30 μs) become agreed with each other. The peak velocity also rises while increasing the power density, the maximum velocity acquired in the simulation is over 468 m/s, which is expected to be effective for high speed flow control.

关键词: surface arc, pulsed DC discharge, shockwave, propagation velocity

Abstract: The shockwave induced by surface direct-current (DC) arc discharge is investigated both experimentally and numerically. In the experiment, the shockwave generated by rapid gas heating is clearly observed from Schlieren images. The peak velocity of the shockwave is measured to be over 410 m/s; during its upright movement, it gradually falls to about 340 m/s; no remarkable difference is seen after changing the discharge voltage and the pulse frequency. In the modeling of the arc plasma, the arc domain is not simulated as a boundary condition with fixed temperature or pressure, but a source term with a time-varying input power density, which could better reflect the influence of the heating process. It is found that with a reference power density of 2.8×1012 W/m3, the calculated peak velocity is higher than the measured one, but they quickly (in 30 μs) become agreed with each other. The peak velocity also rises while increasing the power density, the maximum velocity acquired in the simulation is over 468 m/s, which is expected to be effective for high speed flow control.

Key words: surface arc, pulsed DC discharge, shockwave, propagation velocity

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)