Time-resolved imaging of anodic arc root behavior during fluctuations of a dc plasma spraying torch

被引：68

作者：

Dorier, JL ^{[1
]}

Gindrat, M

Hollenstein, C

Salito, A

Loch, M

Barbezat, G

机构：

[1] Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland

[2] Sulzer Meteo Switzerland AG, CH-5610 Wohlen, Switzerland

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2001年 / 29卷 / 03期

关键词：

arc root; fast imaging; fluctuations; plasma spraying; restrike; torch;

D O I：

10.1109/27.928947

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 fluctuating behavior of a Sulzer Metco F4 de plasma gun has been investigated by simultaneous measurement of the:time dependencies of the are voltage and of images from the nozzle interior. An end-on imaging arrangement using a mirror and a mask in the optical path from the are to the camera allows visualization of the anodic are attachment by strongly attenuating the bright emission from the are column, With the torch operating in the restrike mode, sequences of images have been acquired in synchronization with several typical features of the are voltage fluctuations showing that the attachment nature changes during a restrike cycle, Multiple attachments which coexist at least during the 1 mus exposure time of the camera have been evidenced and are interpreted as a continuous process of creation/vanishing of successive are roots with a smooth transfer of the current from one to the other, The anode wear is shown to have a strong effect on the root position over the anode periphery, with a preference for attachment in eroded regions. The effects of operation parameters such as current, gas flow and injector type on the attachment nature and position are also presented.

引用

页码：494 / 501

页数：8

共 19 条

[11] PLASMA SPRAYING - PRESENT AND FUTURE [J].

FAUCHAIS, P ;

VARDELLE, M .

PURE AND APPLIED CHEMISTRY, 1994, 66 (06) :1247-1258

[12]

HEBERLEIN J, 1997, P 13 INT S PLASM CHE, V3, P1460

[13]

Pfender E, 1998, THERMAL SPRAY, VOLS 1 AND 2, P315

[14] Velocity measurements for arc jets produced by a DC plasma spray torch [J].

Planche, MP ;

Coudert, JF ;

Fauchais, P .

PLASMA CHEMISTRY AND PLASMA PROCESSING, 1998, 18 (02) :263-283

[15]

PUTKO VF, 1994, THERMAL PLASMA NEW M, V1

[16]

RUSS S, 1993, THERM SPRAY COAT, P97

[17] STUDY OF ELECTRIC-ARC BEHAVIOR WITH SUPERIMPOSED FLOW [J].

WUTZKE, SA ;

PFENDER, E ;

ECKERT, ERG .

AIAA JOURNAL, 1967, 5 (04) :707-&

[18]

XI J, 1997, P THERM SPRAY UN FOR, P413

[19]

Zierhut J, 1998, THERMAL SPRAY, VOLS 1 AND 2, P1375

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