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Integrated parametric study of a hybrid-stabilized argon–water arc under subsonic, transonic and supersonic plasma flow regimes
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SYSNO ASEP 0365671 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Integrated parametric study of a hybrid-stabilized argon–water arc under subsonic, transonic and supersonic plasma flow regimes Author(s) Jeništa, Jiří (UFP-V) RID, ORCID
Takana, H. (JP)
Nishiyama, H. (JP)
Bartlová, M. (CZ)
Aubrecht, V. (CZ)
Křenek, Petr (UFP-V) RID
Hrabovský, Milan (UFP-V) RID
Kavka, Tetyana (UFP-V) RID
Sember, Viktor (UFP-V) RID
Mašláni, Alan (UFP-V) RIDSource Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 44, č. 43 (2011), s. 435204-435204Number of pages 20 s. Publication form web - web Language eng - English Country GB - United Kingdom Keywords hybrid-stabilized electric arc ; mass flow rate ; net emission coefficients ; partial characteristics ; Mach number ; shock diamonds Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GAP205/11/2070 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000296591100006 DOI 10.1088/0022-3727/44/43/435204 Annotation This paper presents a numerical investigation of characteristics and processes in the worldwide unique type of thermal plasma generator with combined stabilization of arc by argon flow and water vortex, the so-called hybrid-stabilized arc. The arc has been used for spraying of ceramic or metallic particles and for pyrolysis of biomass. The net emission coefficients as well as the partial characteristics methods for radiation losses from the argon–water arc are employed. Calculations for 300–600A with 22.5–40 standard litres per minute (slm) of argon reveal transition from a transonic plasma flow for 400A to a supersonic one for 600A with a maximum Mach number of 1.6 near the exit nozzle of the plasma torch. A comparison with available experimental data near the exit nozzle shows very good agreement for the radial temperature profiles. Radial velocity profiles calculated 2mm downstream of the nozzle exit show good agreement with the profiles determined from the combination Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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