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Study of the Nitrogen Arc under Reduced Pressure
Author(s) -
Kaminska A.
Publication year - 1995
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150350205
Subject(s) - arc (geometry) , current (fluid) , plasma , materials science , voltage , mechanics , volumetric flow rate , electric arc , vortex , plasma torch , flow (mathematics) , atmospheric pressure , atomic physics , physics , electrode , thermodynamics , meteorology , mechanical engineering , quantum mechanics , engineering
The paper presents a model of arc in a d.c. vortex plasma torch which allows to determine distributions of temperature and plasma electron density in conditions of reduced pressure. The model makes it possible to elucidate voltage‐current characteristics of the arc at different pressures and its dynamic behaviour connected with the phenomenon of the electric arc root displacement. The experimental research also determined voltage‐current characteristics for different flow rates and pressures. The fluctuations of the arc current and the arc voltage were measured. The corresponding wave shapes were analysed by Fast Fourier Transform. The frequency variations with flow rate, arc current and pressure were studied and discussed.