Interaction of a free burning arc with regenerative protective layers

Uhrlandt, Dirk; Gorchakov, Sergey; Brueser, Volker; Franke, St.; Khakpour, Alireza; Lisnyak, Marina; Methling, Ralf; Schoenemann, Th.

doi:10.1088/1742-6596/550/1/012010

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…An arc quite similar to that considered here has been studied by optical emission spectroscopy [17]. The comparison of the spectroscopic results with simple spectrum simulations for Cu arcs results in a typical arc temperature between 14 and 16 kK.…”

Section: B Estimation Of Arc Pressure Mass Fluxes and Enthalpymentioning

confidence: 92%

“…It is known from [17] and [18] that the high current densities at the W-Cu electrodes (order of 10 7 A/m 2 ) lead to considerable electrode erosion and, finally, to jets of copper vapor from each electrode. Because of the high vaporization temperature of W, the influence of W vapor in the plasma column can be neglected, which is confirmed by the low radiation intensity of W lines in the spectrum.…”

Section: Methodsmentioning

confidence: 99%

“…It should be observed that k rad , k tur , k axmf , k ramf , and k net are calibration constants. Alternatively to (9), the radiative power loss can be calculated as a function of the net emission coefficient (NEC) [17]. In this case, the radiative power loss is defined as described in (14) as a function of arc diameter, arc length, and NEC ε N P rad = 2π 2 r 2 arc l arc ε N (14) where the cylindrical arc region with the radius r arc is assumed to be homogeneous and identical with the hottest region, for simplicity.…”

Section: B Power-based Modelmentioning

confidence: 99%

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Electrical Arc Model Based on Physical Parameters and Power Calculation

Khakpour

Franke

Uhrlandt

et al. 2015

IEEE Trans. Plasma Sci.

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This paper presents an electrical arc model based on physical parameters of the arc including temperature, enthalpy, pressure, and also arc geometry. In this model, different mass flows and power losses are considered. The different powers including radiative and turbulent power as well as power gain and loss carried by axial and radial mass flows are calculated and simulated as a function of physical parameters. Moreover, the different arc diameter expressions and their influence on power losses are examined by arc experiments with high-speed imaging and arc dynamic behavior analysis. This model can provide the dynamic behavior of the arc easier in contrast to more complex physical models. The comparison with conventional arc models, such as Schwamaker, Habedank, Kema, and Schwarz, illustrates that the new arc model can better reproduce electrical measurements.

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Section: B Estimation Of Arc Pressure Mass Fluxes and Enthalpymentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%