Numerical Simulation of the Effect of Annular Boss Structure on DC Arc Anode Attachment

Niu, Chong; Hu, Yahao; Shao, Kang; Sun, Su‐Rong; Wang, Haixing

doi:10.1007/s11090-022-10249-z

Cited by 6 publications

(2 citation statements)

References 44 publications

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“…Based on this study, considering that the arc attachment mode could be adjusted by designing the anode protrusions structure to enhance the heat transfer of the anode. Niu et al [64] established a 2D axisymetrical twotemperature chemical non-equilibrium model and explored the physical characteristics of the arc with the presence of the anode protrusions. The results exhibited that the existence of annular boss changed the electric field intensity, the direction and magnitude of Lorentz force, which inhibited the formation of anodic jet.…”

Section: Near-anode Regionmentioning

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: Near-anode Regionmentioning

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 model assumed steady, laminar, continuum, and axisymmetric flow. Wang and his colleagues [17,[29][30][31][32][33] developed a two-temperature finiterate chemical kinetic model in a similar approach. They conducted various numerical studies to understand the plasma flow, heat transfer characteristics, energy conversion, chemical kinetics, species distribution, and arc attachment process in low-power arcjet thrusters.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional numerical study on the effect of geometric asymmetry on arcjet thruster performance

Nandyala

Kumar

Jayachandran

2023

Plasma Sci. Technol.

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In an arcjet thruster, the cathode and constrictor degrade with time, and the electrical arc discharge may become unsymmetrical. In this work, a three-dimensional numerical model of hydrogen plasma arcjet is developed and validated to study the effect of unsymmetrical electric arc discharge on thruster performance. The unsymmetrical arc discharge is realized by introducing a radial shift of the cathode so that the cathode tip offset is 80 μm (25 % of the constrictor radius). Simulations are conducted for both axially centered cathode (coaxial) and off-centered cathode (non-coaxial) configurations with identical propellant flow rates and input current. Simulations show asymmetrical arc discharge in non-coaxial cathode configuration, resulting in azimuthally asymmetric Joule heating, species concentrations, and velocity field. This asymmetry continues as the plasma expands in the divergent section of the nozzle. Temperature, species concentrations, and axial velocity exhibit asymmetric radial distribution at the nozzle exit. The computed Joule heating was found to reduce with cathode shift, and consequently, the thrust and specific impulse of the thruster was decreased by about 6.6 %. In the case of the non-coaxial cathode, geometric asymmetry also induces a small side thrust.

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Cathode sheath parameters and their influences on arc root behavior after liquid metal bridge rupture in atmospheric air

Peng,

Li,

Yang

et al. 2023

Physics of Fluids

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The cathode sheath (CS) formation of the direct current air circuit breaker is simulated by a fluid model, and the influence of metal vapor concentration between the contacts after liquid metal bridge rupture is considered. The CS conductivity increases with the increasing concentration of copper vapor. The copper vapor concentration increases from 5% to 95%, and the thickness of the positive space charge layer and ionization layer increases from 22.3 and 49.1 μm to 51.8 and 81.7 μm, respectively. Increasing the CS conductivity is beneficial for the motion of arc roots in a certain range.

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Numerical Simulation of the Effect of Annular Boss Structure on DC Arc Anode Attachment

Cited by 6 publications

References 44 publications

Research progress on numerical simulation of arc discharge plasma process

Research progress on numerical simulation of arc discharge plasma process

A three-dimensional numerical study on the effect of geometric asymmetry on arcjet thruster performance

Cathode sheath parameters and their influences on arc root behavior after liquid metal bridge rupture in atmospheric air

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