Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 2: Atmospheric Plasmas and their Applications I
P 2.2: Vortrag
Montag, 31. März 2025, 14:15–14:30, ZHG006
Properties of microarcs in atmospheric pressure air in a presence of metal vapour — •Margarita Baeva1 and Dirk Uhrlandt2 — 1Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany — 2Institute of Electrical Power Engineering, University of Rostock, Rostock, Germany
Electric discharges in presence of metal vapours can be found in various applications, e.g. in switching devices and welding arcs. In low-voltage, low-current switching devices, an electric arc in metal vapours occurs during the early contact opening. A bridge of molten metal can be built and it can break at temperatures close to the boiling temperature of the material so that the gap between the electrodes is filled with metal vapour. The metal atoms are easily ionized due to their low ionization potential and a discharge ignites.
In this contribution, we report results from modelling studies of microarcs in atmospheric pressure air-copper vapour mixtures. The effects of copper metal vapour on the microarc properties and plasma chemistry are studied. Findings demonstrate the spatial structure of the microarc and the behaviour of the plasma parameters for various ratios of the air and metal vapour concentrations, and the length of the inter-electrode gap.
The work is funded by the German Research Foundation (DFG) Project number 524731006.
Keywords: microarcs; unified modelling; air-Cu mixtires