Thermal re-ignition processes of switching arcs with various gas-blast using voltage application highly controlled by powersemiconductors

Tomoyuki Nakano, Yasunori Tanaka, K. Murai, Y. Uesugi, T. Ishijima, K. Tomita, K. Suzuki, T. Shinkai

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

This paper focuses on a fundamental experimental approach to thermal arc re-ignition processes in a variety of gas flows in a nozzle. Using power semiconductor switches in the experimental system, the arc current and the voltage applied to the arc were controlled with precise timing. With this system, residual arcs were created in decaying phase under free recovery conditions; arc re-ignition was then intentionally instigated by application of artificial voltage - i.e. quasi-transient recovery voltage - to study the arc behaviour in both decaying and re-ignition phases. In this study, SF6, CO2, N2, O2, air and Ar arcs were intentionally re-ignited by quasi-TRV application at 20 μs delay time from initiation of free recovery condition. Through these experiments, the electron density at the nozzle throat was measured using a laser Thomson scattering method together with high speed video camera observation during the re-ignition process. Temporal variations in the electron density from the arc decaying to re-ignition phases were successfully obtained for each gas-blast arc at the nozzle throat. In addition, initial dielectric recovery properties of SF6, CO2, air and Ar arcs were measured under the same conditions. These data will be useful in the fundamental elucidation of thermal arc re-ignition processes.

本文言語英語
論文番号215202
ジャーナルJournal of Physics D: Applied Physics
51
21
DOI
出版ステータス出版済み - 4月 30 2018

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 音響学および超音波学
  • 表面、皮膜および薄膜

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