Mechanisms of the Formation of an Electric Arc of a Helical Shape in an External Axial Magnetic Field

Urusov, R. M.; Urusova, I. R.

doi:10.1134/s0018151x19020226

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…The results showed that arc plasma was axially compressed and bent towards the bottom of the cathode, and the results are in agreement with the experiment. Related researches [82,83] have investigated and mastered the behavior of ADP in the presence of magnetic fields. Based on the theoretical results, by virtue of the significant magnetic controllability of arc plasma, Zhang et al [84] proposed a technique by applying external magnetic field during the welding process, and explored the arc behavior under external electromagnetic field using a 3D arc coupled cathode model.…”

Section: Numerical Simulation Of Adp Generatorsmentioning

confidence: 99%

Research progress on numerical simulation of arc discharge plasma process

Zhang,

Yuan,

Ding

et al. 2024

Phys. Scr.

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The arc discharge plasma (ADP) technology has been widely developed in the fields of cutting, welding, spraying and nanomaterials synthesis over the past 20 years. However, during the process of ADP, it is difficult to explain the generation and evolution of arc column, the interaction between arc column and electrodes, as well as the effect of plasma generator structure on the physical characteristics of ADP by experimental means. Therefore, numerical simulation has become an effective mean to explore the physical characteristics of ADP, but also faces severe challenges because it involves multiple physical field coupling, resolution of multiscale features as well as robustness in the presence of large gradients. From the point of view of the construction of ADP mathematical physical models and combined with the practical application of ADP, this paper systematically reviews the researches on physical properties of arc column, near-cathode region, near-anode region as well as the today’s state of the numerical simulation of plasma generators. It provides a good reference for further mastering the physical characteristics of plasma, guiding the industrial application of plasma and optimizing the design of plasma generators. Meanwhile, the relevant computational aspects are discussed and the challenges of plasma numerical simulation in the future are summarized.

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Section: Numerical Simulation Of Adp Generatorsmentioning

confidence: 99%

Research progress on numerical simulation of arc discharge plasma process

Zhang,

Yuan,

Ding

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

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Shunting the electric arc helical spiral turns (numerical simulation)

Urusov

Urusova

2020

Physics of Plasmas

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A numerical simulation was performed for an open direct current (dc) electric arc in a uniform external axial magnetic field. The calculation was carried out in the frameworks of a non-stationary three-dimensional mathematical model in approximation of partial local thermodynamic equilibrium of plasma. The model does not presuppose a helical shape of the arc, as is customary in theoretical studies based on linear perturbation theory. It was shown that the helical shape of an open arc is not constant in time and periodically collapses with subsequent restoration. In a certain range of external parameters of the arc (current strength, inter-electrode distance, and external axial magnetic field), a new mode of destruction of a regular structure was revealed – the arc section shunting between the spiral turns. Shunting can be single or double when the breakdown occurs simultaneously in two places. Apparently, it is caused by convective heat transfer by plasma flows as well as by the sliding of the arc thermal field. The appeared thermal field creates a zone of electric conductivity in which the breakdown occurs.

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Obtaining Nanosized Materials in Plasma Discharge and Ultrasonic Cavitation

Булычев

2022

High Temp

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Mechanisms of the Formation of an Electric Arc of a Helical Shape in an External Axial Magnetic Field

Cited by 5 publications

References 8 publications

Research progress on numerical simulation of arc discharge plasma process

Research progress on numerical simulation of arc discharge plasma process

Shunting the electric arc helical spiral turns (numerical simulation)

Obtaining Nanosized Materials in Plasma Discharge and Ultrasonic Cavitation

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