On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet

Sweeping double probe measurements in an atmospheric pressure direct current vortex-stabilized plasma jet are reported (plasma conditions: 100 A discharge current, N2 gas flow rate of 25 Nl/min, thoriated tungsten rod-type cathode, copper anode with 5 mm inner diameter). The interpretation of the do...

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Autor principal: Kelly, Héctor Juan
Publicado: 2014
Materias:
Atmospheric pressure
Carrier concentration
Electron density measurement
Flow rate
Plasma jets
Vortex flow
Discharge currents
Kinetic equilibrium
Large deviations
Nonequilibrium plasmas
Plasma conditions
Temperature values
Thermal process
Thoriated tungsten
Probes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346748_v85_n5_p_Prevosto
http://hdl.handle.net/20.500.12110/paper_00346748_v85_n5_p_Prevosto
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00346748_v85_n5_p_Prevosto2023-06-08T15:00:54Z On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet Kelly, Héctor Juan Atmospheric pressure Carrier concentration Electron density measurement Flow rate Plasma jets Vortex flow Discharge currents Kinetic equilibrium Large deviations Nonequilibrium plasmas Plasma conditions Temperature values Thermal process Thoriated tungsten Probes Sweeping double probe measurements in an atmospheric pressure direct current vortex-stabilized plasma jet are reported (plasma conditions: 100 A discharge current, N2 gas flow rate of 25 Nl/min, thoriated tungsten rod-type cathode, copper anode with 5 mm inner diameter). The interpretation of the double probe characteristic was based on a generalization of the standard double floating probe formulae for non-uniform plasmas coupled to a non-equilibrium plasma composition model. Perturbations caused by the current to the probe together with collisional and thermal processes inside the probe perturbed region were taken into account. Radial values of the average electron and heavy particle temperatures as well as the electron density were obtained. The calculation of the temperature values did not require any specific assumption about a temperature relationship between different particle species. An electron temperature of 10900 ± 900 K, a heavy particle temperature of 9300 ± 900 K, and an electron density of about 3.5 × 10 22 m-3 were found at the jet centre at 3.5 mm downstream from the torch exit. Large deviations from kinetic equilibrium were found toward the outer border of the plasma jet. These results showed good agreement with those previously reported by the authors by using a single probe technique. The calculations have shown that this method is particularly useful for studying spraying-type plasma torches operated at power levels of about 15 kW. © 2014 AIP Publishing LLC. Fil:Kelly, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346748_v85_n5_p_Prevosto http://hdl.handle.net/20.500.12110/paper_00346748_v85_n5_p_Prevosto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atmospheric pressure
Carrier concentration
Electron density measurement
Flow rate
Plasma jets
Vortex flow
Discharge currents
Kinetic equilibrium
Large deviations
Nonequilibrium plasmas
Plasma conditions
Temperature values
Thermal process
Thoriated tungsten
Probes
spellingShingle Atmospheric pressure
Carrier concentration
Electron density measurement
Flow rate
Plasma jets
Vortex flow
Discharge currents
Kinetic equilibrium
Large deviations
Nonequilibrium plasmas
Plasma conditions
Temperature values
Thermal process
Thoriated tungsten
Probes
Kelly, Héctor Juan
On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
topic_facet Atmospheric pressure
Carrier concentration
Electron density measurement
Flow rate
Plasma jets
Vortex flow
Discharge currents
Kinetic equilibrium
Large deviations
Nonequilibrium plasmas
Plasma conditions
Temperature values
Thermal process
Thoriated tungsten
Probes
description Sweeping double probe measurements in an atmospheric pressure direct current vortex-stabilized plasma jet are reported (plasma conditions: 100 A discharge current, N2 gas flow rate of 25 Nl/min, thoriated tungsten rod-type cathode, copper anode with 5 mm inner diameter). The interpretation of the double probe characteristic was based on a generalization of the standard double floating probe formulae for non-uniform plasmas coupled to a non-equilibrium plasma composition model. Perturbations caused by the current to the probe together with collisional and thermal processes inside the probe perturbed region were taken into account. Radial values of the average electron and heavy particle temperatures as well as the electron density were obtained. The calculation of the temperature values did not require any specific assumption about a temperature relationship between different particle species. An electron temperature of 10900 ± 900 K, a heavy particle temperature of 9300 ± 900 K, and an electron density of about 3.5 × 10 22 m-3 were found at the jet centre at 3.5 mm downstream from the torch exit. Large deviations from kinetic equilibrium were found toward the outer border of the plasma jet. These results showed good agreement with those previously reported by the authors by using a single probe technique. The calculations have shown that this method is particularly useful for studying spraying-type plasma torches operated at power levels of about 15 kW. © 2014 AIP Publishing LLC.
author Kelly, Héctor Juan
author_facet Kelly, Héctor Juan
author_sort Kelly, Héctor Juan
title On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
title_short On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
title_full On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
title_fullStr On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
title_full_unstemmed On the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
title_sort on the use of the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortex-stabilized nitrogen plasma jet
publishDate 2014
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00346748_v85_n5_p_Prevosto
http://hdl.handle.net/20.500.12110/paper_00346748_v85_n5_p_Prevosto
work_keys_str_mv AT kellyhectorjuan ontheuseofthedoublefloatingprobemethodtoinferthedifferencebetweentheelectronandtheheavyparticlestemperaturesinanatmosphericpressurevortexstabilizednitrogenplasmajet
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