Experimental investigation of anode arc attachment area in DC arc plasma torch at low pressures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00508157" target="_blank" >RIV/61389021:_____/19:00508157 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/19:10396104

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6463/ab3197" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/ab3197</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/ab3197" target="_blank" >10.1088/1361-6463/ab3197</a>

Result language

angličtina

Original language name

Experimental investigation of anode arc attachment area in DC arc plasma torch at low pressures

Original language description

The anode area and anode erosion of a DC arc plasma torch with an external anode are experimentally investigated using different ambient pressures, arc currents, and anode configurations. A high-speed camera, high-voltage probe, electric probes, and a Schlieren system are utilized. The electric field in the anode area is measured using electric probes at arc electric currents lower than 100 A. It is found that a mean value of the arc electric field above the anode can be satisfactorily estimated in a non-intrusive way when the anode attachment is constricted. Anode erosion is proportional to a variable that can be compared in different experimental conditions just by quickly processing high-speed video footage, even while the plasma torch is in operation. Anode erosion decreases along with ambient pressure and it is lower when a diffuse anode arc attachment is present as opposed to a constricted anode attachment. The sources of plasma fluctuations inside and around the plasma jet are mainly the movement of the anode arc attachment and turbulent vortices. The average speed of the anode arc attachment increases with decreases in ambient pressure. On the contrary, the average period of the restrike process, or the distance between the exit nozzle and the average attachment's position, decreases with reductions in ambient pressure. We report ambient pressure values for the transition between a constricted and diffuse anode arc attachment and for the transition between subsonic and supersonic plasma flow.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/GC17-10246J" target="_blank" >GC17-10246J: Decomposition of perfluorinated compounds and fluorinated ozone depleting substances in thermal plasma jets</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Physics D-Applied Physics

ISSN

0022-3727

e-ISSN

—

Volume of the periodical

52

Issue of the periodical within the volume

40

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

405201

UT code for WoS article

000478781600001

EID of the result in the Scopus database

2-s2.0-85071451528