Experimental investigation of plasma in arc-anode area.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00468681" target="_blank" >RIV/61389021:_____/16:00468681 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Experimental investigation of plasma in arc-anode area.
Original language description
We investigate plasma in the anode attachment area of DC arc plasma torch. The processes in this area influence lifetime of the anode, stability of the plasma flow in a plasma jet and their studying helps better understanding of a movement of the anode attachment in the restrike mode1.We used the high-speed camera (max. 1,080,000 fps and min. exposure time 0.25 μs) and synchronized cathode-anode voltage measurements (sample rate 80 MHz). The anode used was external and therefore it was possible to directly observe the attachment motion during the restrike mode. For this mode, the anode attachment moves periodically downstream along the anode surface. It very often comes to a stop (dwells) at anode surface inhomo geneities, where anode material vaporizes more intensively than in the immediate vicinity. The average total dwell time then describes irregular wearing of the anode surface is worn under various plasma torch parameters. The results also bring better understanding of the anode attachment motion. Based on our experiments we offer an explanation of the restrike anode mode and of the second curvature of the anode attachment, close to the anode surface, proposed in earlier publications2.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA15-19444S" target="_blank" >GA15-19444S: Reforming of gas and liquid hydrocarbons and organics in steam and CO2 thermal plasma jets</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů