Direct probing of anode arc root dynamics and voltage instability in a dc non-transferred arc plasma jet

被引：29

作者：

Ghorui, S. ^{[1
]}

Tiwari, N. ^{[1
]}

Meher, K. C. ^{[1
]}

Jan, A. ^{[2
]}

Bhat, A. ^{[2
]}

Sahasrabudhe, S. N. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Laser & Plasma Technol Div, Bombay 85, Maharashtra, India

[2] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

来源：

PLASMA SOURCES SCIENCE & TECHNOLOGY | 2015年 / 24卷 / 06期

关键词：

arc root; non-transferred arc; arc instability; plasma jet; voltage instability; CARBON NANOTUBES; SPRAY TORCH; ATMOSPHERIC-PRESSURE; HEAT-TRANSFER; FLOW; GROWTH;

D O I：

10.1088/0963-0252/24/6/065003

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The transient dynamics of the anode arc root in a dc non-transferred arc plasma torch is captured through fast photography and directly correlated with the associated voltage instability for the first time. The coexistence of multiple arc roots, the transition to a single arc root, root formation and extinction are investigated for the steady, takeover and re-strike modes of the arc. Contrary to the usual concept, the emerging plasma jet of a dc non-transferred arc plasma torch is found to carry current. An unusually long self-propelled arc plasma jet, a consequence of the phenomenon, is demonstrated.

引用

页数：10

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