Corona discharge has been extensively adopted for plasma generation, but its practical application is constrained by discharge uniformity and operational stability. In this study, numerical simulations are performed to explore the enhancement mechanism of external magnetic fields on corona discharge, with a focus on the influences of coil configuration, excitation current magnitude, and needle electrode spacing. The simulation results reveal that Helmholtz coils achieve optimal electric field enhancement by eliminating axial magnetic field gradients. Nevertheless, excessively high excitation current will trigger the transition of discharge mode from diffuse corona to arc discharge. Additionally, an optimal needle electrode spacing is determined to strike a balance between electric field intensity and spatial uniformity. The outcomes of this study provide a solid theoretical foundation for the design and optimization of magnetic field-assisted corona discharge systems, which hold promising prospects for environmental treatment and material processing applications.
Non-thermal plasma shows great potential for air purification because of its low temperature, abundant reactive species, and moderate power density. However, in atmospheric-pressure air, the short electron mean free path readily promotes filamentary discharge, leading to the localized distribution of discharge energy a...
Dan-Fei Lu, Shuai Xu, P. Niu et al.· Journal of Physics D: Applie...· 0 citations
A two-dimensional axisymmetric Particle-in-Cell/Monte Carlo collision model is employed to investigate the effects of magnetic field strength on magnetized inductively coupled plasma. The results show that increasing magnetic field strength significantly modifies plasma characteristics and energy transport. The electro...
Ming-Lun Tian, Peng Xiao, Zhao-Yun Chen et al.· Physics of Plasmas· 0 citations
The magnetic performance of vacuum circuit breakers is of vital importance for their stable operation. This paper systematically investigates the mechanism and performance boundaries of magnetic control during the vacuum arc combustion process. The traditional single magnetic field system has its inherent limitations:...
Jingzhe Ming, Zhao Yuan, Hai-Ming Wang et al.· Journal of Physics D: Applie...· 0 citations
The aim of this study is to investigate the effect of permanent magnet arrangements on the efficiency of an eddy current magnetic separator. Such a separator consists mainly of a drum equipped with identical NdFeB permanent magnet bars, with a residual magnetic flux density (Br) of 1.1 T, and a conveyor belt that trans...
M. Ouili, R. Mehasni· Periodica Polytechnica Elect...· 0 citations
Phenomenon of concurrent external discharges and plasma expansion can occur in practical coaxial dielectric barrier discharge (DBD) systems, yet their impact on electrical diagnostics and discharge behavior remains insufficiently understood. To investigate these effects, a coaxial atmospheric-pressure air DBD operated...
Raif Hamzah, L. Lim, H. Wante et al.· Physica Scripta· 0 citations
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