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Title: The effect of working gas impurities on plasma jets

Abstract

Air intrusion reduced the purity of working gas inside the tube for plasma jet, and thereby, affected the discharge dynamics. In this paper, the effect of using working gas with different purity level (helium purity 99.99999%, 99.99%, 99.9%, and 99%) on photoionization and the chemical reactivity of plasma jet were studied using a 2 dimensional plasma jet model. Photoionization of air species acted as a source of pre-ionization in front of the ionization region, which facilitated the transition from localized discharge to streamers inside the tube. The density of reactive species inside the tube was found to increase with the concentration of working gas impurities. For the highest purity helium (99.99999%), despite a low photoionization rate and the distance between the photoionization region and ionization region inside the tube, by increasing the applied voltage and decreasing the distance between the electrode and nozzle, plasma jets were formed.

Authors:
;  [1];  [2];  [1];  [2];  [2]
  1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, WuHan, HuBei 430074 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22408374
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR INFILTRATION; DISTANCE; DYNAMICS; ELECTRIC DISCHARGES; ELECTRIC POTENTIAL; ELECTRODES; HELIUM; NOZZLES; PHOTOIONIZATION; PLASMA IMPURITIES; PLASMA JETS; REACTIVITY; TWO-DIMENSIONAL CALCULATIONS; WORKING FLUIDS

Citation Formats

Liu, X. Y., He, M. B., E-mail: pulhmb@mail.hust.edu.cn, IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, Liu, D. W., IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, and State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shanxi 710049. The effect of working gas impurities on plasma jets. United States: N. p., 2015. Web. doi:10.1063/1.4918693.
Liu, X. Y., He, M. B., E-mail: pulhmb@mail.hust.edu.cn, IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, Liu, D. W., IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, & State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shanxi 710049. The effect of working gas impurities on plasma jets. United States. doi:10.1063/1.4918693.
Liu, X. Y., He, M. B., E-mail: pulhmb@mail.hust.edu.cn, IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, Liu, D. W., IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, and State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shanxi 710049. Wed . "The effect of working gas impurities on plasma jets". United States. doi:10.1063/1.4918693.
@article{osti_22408374,
title = {The effect of working gas impurities on plasma jets},
author = {Liu, X. Y. and He, M. B., E-mail: pulhmb@mail.hust.edu.cn and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240 and Liu, D. W. and IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240 and State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an, Shanxi 710049},
abstractNote = {Air intrusion reduced the purity of working gas inside the tube for plasma jet, and thereby, affected the discharge dynamics. In this paper, the effect of using working gas with different purity level (helium purity 99.99999%, 99.99%, 99.9%, and 99%) on photoionization and the chemical reactivity of plasma jet were studied using a 2 dimensional plasma jet model. Photoionization of air species acted as a source of pre-ionization in front of the ionization region, which facilitated the transition from localized discharge to streamers inside the tube. The density of reactive species inside the tube was found to increase with the concentration of working gas impurities. For the highest purity helium (99.99999%), despite a low photoionization rate and the distance between the photoionization region and ionization region inside the tube, by increasing the applied voltage and decreasing the distance between the electrode and nozzle, plasma jets were formed.},
doi = {10.1063/1.4918693},
journal = {Physics of Plasmas},
number = 4,
volume = 22,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}