Open AccessSimulation on similarity law of glow discharge in scale-down gaps of rod-plane electrode configuration
Author(s) -
Yangyang Fu,
Luo Hai-Yun,
Xiaobing Zou,
Qiang Wang,
Xinxin Wang
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.095206
Subject(s) - glow discharge , voltage , similarity (geometry) , electric field , argon , materials science , electron density , plane (geometry) , electrode , electron , atomic physics , current density , direct current , physics , plasma , computer science , geometry , mathematics , quantum mechanics , artificial intelligence , image (mathematics)
A fluid model of direct-current (DC) discharge in argon atmosphere between the gaps of rod-plane electrode configuration was established, and the discharge models of two geometrically similar gaps were solved using the finite-element method, respectively. The dimension ratio of the gaps was set as 10:1, and the gas pressure was 133.3 Pa for the prototype and 133 Pa for the scale-down gap; to the gaps the same DC voltages were applied. Voltage-current characteristics, as well as the physical discharge parameters (such as electric potential, electric field, electron density, ion density, and electron temperature) were obtained. Relations between parameters of the two gaps were investigated according to the theoretical relations derived by similarity law. Simulation results show that the discharge type in the two similar gaps is verified as a normal glow discharge; the parameter relations are in good agreement with the similarity law, and the working points of discharges are identical in similar gaps with the same applied DC voltage. This study could offer theoretical instruction in extrapolating the discharge properties for similar gaps.