The study of processes influencing radial transport of energy in a liquid-stabilized electric arc
Project ID:GA202/02/1027
Provider:Czech Science Foundation
Period:Jan 01, 2002 - Dec 31, 2004
Recipient - coordinatorInstitute of Plasma Physics, Czech Academy of Sciences, Prague
Principal Investigator:Ing. Jiří Jeništa, CSc.
Co-recepient(s) / PI(s):Faculty of Electrical Engineering and Communication, Brno University of Technology -- Doc. RNDr. Milada Bartlová, Ph.D.
Co-investigators from IPPM. Hrabovský, V. Kopecký

Aims of the project: The present project will investigate the properties and processes in electric arcs stabilized by liquid (water) vortex (Gerdien arc) and in new hybrid type of arc discharge which combines principles of liquid and gas arc stabilization. The research will be carried out mainly on theoretical basis and special emphasis will be put on radiative transport within the arc column. It was confirmed both experimentally and theoretically that radiation represents the major radial energy losses from the liquid-stabilized arc. Part of the radiation is reabsorbed in colder arc regions, which heats back plasma and causes higher pressures in the discharge leading to higher outflow velocities. Reabsorption of radiation seems to be the key phenomenon influencing parameters of liquid plasma torch. The other part of the project will be devoted to investigation of effects of nonequilibrium to the liquid-stabilized arc performance. It was proved that a significant under population of atomic and ionic

Progress/Results: The project investigated the properties and processes in electric arcs stabilized by liquid vortex (Gerdien arc) and in hybrid type of arc discharge which combines principles of liquid and gas arc stabilization. The predominantly theoretical research was

Results:

Hrabovský M., Kopecký V.: Visualization of Structure of Boundary Layer Between Thermal Plasma Jet and Ambient Air by Moving Electric Probes. IEEE Transactions on Plasma Science 33 [2] (2005) 420-421. [ Abstract ]

Jeništa J., Bartlová M., Aubrecht V.: Radiation in water-vortex stabilized electric arc-comparsion among different models. High Temperature Materials and Processes 8 [2] (2004) 195-206. [ Abstract ]
[E-MRS 2004 Spring Meeting(TPP8 Thermal Plasma Processes).. Strasburg, 24.05.2004-28.05.2004]

Jeništa J., Bartlová M., Aubrecht V.: Comparison of preformance between hybrid and water vortex stabilized electric arcs. New Trends in Physics(NTF 2004). Brno : Department of Physics FEEC, Brno University of Technology, 2004 - (Štrunc, M.; Dobis, P.) s. 178-181. ISBN 80-7355-024-5. [ Abstract ]
[New Trends in Physics (NTF 2004).. Brno (CZ), 11.11.2004-12.11.2004]

Hrabovský M., Chumak O., Kavka T., Kopecký V.: Study of anode restrike progresses in DC arc plasma torch. 12th Workshop Plasma Technology. Ilmenau, 2004 - (Nutsch, G.) s. 15-22. ISBN 3-00-014314-9. [ Abstract ]
[Workshop Plasma Technology /12./. Ilmenau (DE), 23.09.2004-24.09.2004]

Jeništa J.: Numerical modeling of hybrid stabilized electric arc with uniform mixing of gases. IEEE Transactions on Plasma Science 32 [2] (2004) 464-472. [ Abstract ]
[International Conference on Plasma Science/ICOPS 2003./. Jeju, 02.06.2003-05.06.2003]

Jeništa J.: Reabsorption of Radiation in Water-Vortex Stabilized Electric arc and Influence on arc Performance. 15th Symposium on Physics of Switching arc Volume II:Invited Papers (Supplement). Brno : Department of Power Electrical and Electronic Engineering, Brno University of Technology, 2003 - (Gross, B.; Vávra, Z.; Bartl, J.) s. 312-315. ISBN 80-214-2307-2. - (2). [ Abstract ]
[Symposium on Physics of Switching arc/15th./. Nové Město na Moravě (CZ), 22.09.2003-26.09.2003]

Jeništa J.: The Effect of Different Regimes of Operation on Parameters of a Water-Vortex Stabilized Electric Arc. High Temperature Materials and Processes 7 [1] (2003) 11-16. [ Abstract ]

Jeništa J.: Water-Vortex Stabilized Electric Arc: III. Radial energy transport determination of water-vapour-boundary and arc performance. Journal of Physics D-Applied Physics 36 [23] (2003) 2995-3006. [ Abstract ]

Hrabovský M., Kopecký V., Kavka T., Chumak O., Sember V.: Properties of New Plasma Spraying Torch with Hybrid Gas/Liquid Arc Stabilization. 48.Internationales Wissenschaftliches Kolloquium. Ilmenau : Technische Universität Ilmenau, 2003. s. 319-320. ISSN 1619-4098. [ Abstract ]
[Internationales Wissenschaftliches Kolloquium/48./. Ilmenau (DE), 22.09.2003-25.09.2003]

Jeništa J.: The Effect of Different Regimes of Operation on Parameters of a Water-Vortex Stabilized Electric Arc. Progress in Plasma Processing of Materials 2003. New York : Begell House, Inc., 2003 - (Fauchais, P.) s. 231-236. ISBN 1-56700-192-0 [ Abstract ]