Properties of hybrid water/gas DC arc plasma torch

被引：78

作者：

Hrabovsky, Milan ^{[1
]}

Kopecky, Vladimir ^{[1
]}

Sember, Viktor ^{[1
]}

Kavka, Tetyana ^{[1
]}

Chumak, Oleksiy ^{[1
]}

Konrad, Milos ^{[1
]}

机构：

[1] Acad Sci Czech Republ, Inst Plasma Phys, Prague 18200, Czech Republic

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2006年 / 34卷 / 04期

关键词：

hybrid gas/water stabilization; plasma torch; thermal plasma jet; water-stabilized arc;

D O I：

10.1109/TPS.2006.878365

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：

A new type of plasma torch with combined stabilization of electric arc by water vortex and gas flow was investigated. This hybrid water/gas stabilization offers the possibility of adjusting plasma jet parameters within a wide range from high-enthalpy low-density plasmas typical for liquid stabilized torches to lower enthalpy higher density plasmas generated in gas stabilized torches. The torch was operated at an arc power from 22 to 130 kW with an exit. centerline plasma velocity from 2 to 6.5 km/s and a plasma temperature from 14 000 K to 22 000 K. Moreover, gas flow in the cathode part protects a cathode tip and thus a consumable carbon cathode used in water torches could be replaced by a fixed tungsten cathode. The characteristics of the electric arc with combined gas/water stabilization were measured and the effect of gas properties and flow rate on plasma properties and gas-dynamic flow characteristics of the plasma jet were studied for argon, and mixtures of argon with hydrogen and nitrogen.

引用

页码：1566 / 1575

页数：10

共 17 条

[1]

Burnhorn F, 1951, Z PHYS, V129, P369

[2]

Burnhorn F, 1951, Z PHYS, V131, P28

[3]

CHRASKA P, 1992, P INT THERM SPRAY C, P81

[4] Generation of thermal plasmas in liquid-stabilized and hybrid dc-arc torches [J].

Hrabovsky, M .

PURE AND APPLIED CHEMISTRY, 2002, 74 (03) :429-433

[5]

Hrabovsky M, 1998, PURE APPL CHEM, V70, P1157

[6] Processes and properties of electric arc stabilized by water vortex [J].

Hrabovsky, M ;

Konrad, M ;

Kopecky, V ;

Sember, V .

IEEE TRANSACTIONS ON PLASMA SCIENCE, 1997, 25 (05) :833-839

[7] Properties of electric arc stabilized by mixture of water with ethanol [J].

Hrabovsky, M ;

Konrád, M ;

Kopecky, V ;

Sember, V .

HEAT AND MASS TRANSFER UNDER PLASMA CONDITIONS, 1999, 891 :57-63

[8]

HRABOVSKY M, 2000, THERMAL PLASMA TORCH, V1, P242

[9]

HRABOVSKY M, 1997, J HIGH TEMP MAT PROC, V1, P167

[10]

Hrabovsy M, 2001, PROGRESS IN PLASMA PROCESSING OF MATERIALS 2001, P223

← 1 2 →