Model of liquid-metal splashing in the cathode spot of a vacuum arc discharge

被引：44

作者：

Gashkov, M. A. ^{[1
]}

Zubarev, N. M. ^{[1
,2
]}

Zubareva, O. V. ^{[1
]}

Mesyats, G. A. ^{[1
,2
]}

Uimanov, I. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Ural Branch, Inst Electrophys, Ekaterinburg 620016, Russia

[2] Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2016年 / 122卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

CURRENT-DENSITY; ELECTRIC-FIELD; MOLTEN-METAL; SINGLE DROP; SURFACE; IMPACT; MECHANISM; EROSION; FLUID;

D O I：

10.1134/S1063776116040051

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The formation of microjets is studied during the extrusion of a melted metal by the plasma pressure from craters formed on a cathode in a burning vacuum arc. An analytic model of liquid-metal splashing that includes two stages is proposed. At the first stage, the liquid motion has the axial symmetry and a liquid-metal wall surrounding the crater is formed. At the second stage, the axial symmetry is broken due to the development of the Plateau-Rayleigh instability in the upper part of the wall. The wall breakup process is shown to have a threshold. The minimal plasma pressure and the minimal electric current flowing through the crater required for obtaining the liquid-metal splashing regime are found. The basic spatial and temporal characteristics of the jet formation process are found using the analytic model.

引用

页码：776 / 786

页数：11

共 37 条

[1] PULSED DYE-LASER DIAGNOSTICS OF VACUUM-ARC CATHODE SPOTS [J].

ANDERS, A ;

ANDERS, S ;

JUTTNER, B ;

BOTTICHER, W ;

LUCK, H ;

SCHRODER, G .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 1992, 20 (04) :466-472

[2]

Anders A, 2008, SPRINGER SER ATOM OP, V50, P1, DOI 10.1007/978-0-387-79108-1_1

[3]

[Anonymous], 1947, HYDRODYNAMICS

[4]

[Anonymous], 2000, ECTONS VACUUM DISCHA

[5] The impact of a single drop on a wetted solid surface [J].

Cossali, GE ;

Coghe, A ;

Marengo, M .

EXPERIMENTS IN FLUIDS, 1997, 22 (06) :463-472

[6] EROSION AND ORIGIN OF CHARGED AND NEUTRAL SPECIES IN VACUUM ARCS [J].

DAALDER, JE .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1975, 8 (14) :1647-1659

[7] COMPONENTS OF CATHODE EROSION IN VACUUM ARCS [J].

DAALDER, JE .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1976, 9 (16) :2379-+

[8] DIAMETER AND CURRENT DENSITY OF SINGLE AND MULTIPLE CATHODE DISCHARGES IN VACUUM [J].

DAALDER, JE .

IEEE TRANSACTIONS ON POWER APPARATUS AND SYSTEMS, 1974, PA93 (06) :1747-1757

[9]

Grigor'ev I. S., 1991, PHYS VALUES HDB

[10]

Hantzsche E., 1977, Beitraege aus der Plasma Physik, V17, P65, DOI 10.1002/ctpp.19770170107

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