Electric probe diagnostics of DC arc stream-argon plasma jet in atmospheric pressure

0472963 - ÚFP 2017 RIV US eng A - Abstrakt
Hurba, Oleksiy - Hrabovský, Milan
Electric probe diagnostics of DC arc stream-argon plasma jet in atmospheric pressure.
2016 IEEE International Conference on Plasma Science (ICOPS). Vol. 43. Alberta: IEEE, 2016. s. 16211647. ISBN 978-1-4673-9601-1.
[IEEE - 2016 IEEE International Conference on Plasma Science (ICOPS)/43./. 19.06.2016-23.06.2016, Banff, Alberta]
Institucionální podpora: RVO:61389021
Klíčová slova: Probes, Physics * Physics * Plasma temperature * Mathematics * Thermal stability * Thermal spraying
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

Summary form only given. Thermal plasma jet generated by the torch WSP®H 500 with water/argon stabilized arc was investigated. Thermal plasma jets generated in DC arc torches have been used in a number of plasma processing technologies like plasma cutting, spraying, waste treatment and gasification of organics. Electric probes was used for diagnostics of the jet in the region downstream of the torch exit1. Plasma jet was studied under different operating conditions of the plasma torch. Free plasma jet downstream of the plasma torch exit has potential which is determined by voltage drop on the plasma jet attachment to the anode. The fact that surrounding region around the plasma jet is electrically conductive even in large distances from the torch exit nozzle has been determined. Electron currents can flow to the earthed substrate at plasma processing applications and can influence plasma processing result. The conductivity of surrounding of plasma jet is caused by a presence of small plasma structures with temperature substantially higher than average temperature at these positions2. These plasma structures were ejected from the plasma jet boundary and remained even in huge distances from the torch.
Trvalý link: http://hdl.handle.net/11104/0270154