Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region
To accurately simulate the plasma arc (PA) behavior in a wide current range, a steady two-dimensional model for the numerical calculation of the axisymmetric PA considering the high temperature cathode region (HTCR) was proposed. Based on the experimentally measured HTCR area, two distribution forms...
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2021-08-01
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Online Access: | http://dx.doi.org/10.1063/5.0053518 |
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doaj-f34e46dbe3a34add96298f0066ea20b72021-09-03T11:18:12ZengAIP Publishing LLCAIP Advances2158-32262021-08-01118085211085211-1010.1063/5.0053518Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode regionHao Tang0ZuMing Liu1Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaTianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaTo accurately simulate the plasma arc (PA) behavior in a wide current range, a steady two-dimensional model for the numerical calculation of the axisymmetric PA considering the high temperature cathode region (HTCR) was proposed. Based on the experimentally measured HTCR area, two distribution forms, namely, the mean value method and the Gaussian distribution method, were used to simulate the current density distribution behavior in the tungsten tip. The two proposed current densities were compared with the average current density model with a fixed discharge region. The Gaussian distribution form was chosen after a comprehensive comparison of experimental measured data and simulation data in aspects of arc pressure, electron temperature, and arc voltage at a welding current of 120 A. The model was verified to be accepted in a current range of 110–170 A by comparing the simulated and measured peak arc pressure values. The model has higher prediction accuracy over the common plasma arc model with the unchanged tip cathode, extends the prediction current range, and provides a tool for optimizing the nozzle structure and process parameters.http://dx.doi.org/10.1063/5.0053518 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hao Tang ZuMing Liu |
spellingShingle |
Hao Tang ZuMing Liu Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region AIP Advances |
author_facet |
Hao Tang ZuMing Liu |
author_sort |
Hao Tang |
title |
Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
title_short |
Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
title_full |
Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
title_fullStr |
Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
title_full_unstemmed |
Increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
title_sort |
increasing prediction accuracy of plasma arc properties by considering current density deduced from measured cathode region |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2021-08-01 |
description |
To accurately simulate the plasma arc (PA) behavior in a wide current range, a steady two-dimensional model for the numerical calculation of the axisymmetric PA considering the high temperature cathode region (HTCR) was proposed. Based on the experimentally measured HTCR area, two distribution forms, namely, the mean value method and the Gaussian distribution method, were used to simulate the current density distribution behavior in the tungsten tip. The two proposed current densities were compared with the average current density model with a fixed discharge region. The Gaussian distribution form was chosen after a comprehensive comparison of experimental measured data and simulation data in aspects of arc pressure, electron temperature, and arc voltage at a welding current of 120 A. The model was verified to be accepted in a current range of 110–170 A by comparing the simulated and measured peak arc pressure values. The model has higher prediction accuracy over the common plasma arc model with the unchanged tip cathode, extends the prediction current range, and provides a tool for optimizing the nozzle structure and process parameters. |
url |
http://dx.doi.org/10.1063/5.0053518 |
work_keys_str_mv |
AT haotang increasingpredictionaccuracyofplasmaarcpropertiesbyconsideringcurrentdensitydeducedfrommeasuredcathoderegion AT zumingliu increasingpredictionaccuracyofplasmaarcpropertiesbyconsideringcurrentdensitydeducedfrommeasuredcathoderegion |
_version_ |
1717817390981447680 |