Numerical simulation of effect of discharge gap on arc characteristics of sheet tungsten electrode under vertical sidewall anode configuration

Ye, Tao; Li, Yuanbo; Zheng, Wenxing; Liu, Xing; Zhao, Xilong

doi:10.1007/s00170-022-09126-y

Cited by 4 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results exhibited that the high temperature and low speed characteristic of arc plasma in the multi-cathode generator is conducive to the good movement of powder in the axial direction, showing great potential of multi-cathode ADP generator applied in the spheroidization of tungsten powder. Ye et al [77] explored the influence of the discharge gap on the arc characteristics of the tungsten sheet electrode in the vertical sidewall anode structure, and calculated the flow field distribution, current density distribution, temperature distribution, viscosity distribution and pressure distribution of the asymmetric arc by changing the vertical the horizontal discharge gaps. They also analyzed the effect of joule heat on temperature distribution from the aspect of current density distribution caused by discharge gap variation, the results exhibited that the discharge gap of vertical sidewall anode structure has an important effect on the arc characteristics of tungsten plate electrode.…”

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

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.

show abstract

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

show abstract

Numerical simulation of influence of constraint wall configuration on arc characteristics of sheet tungsten electrode

2022

Materials Today Communications

View full text Add to dashboard Cite

A large-format streak tube for compressed ultrafast photography

Xue

Tian

et al. 2022

Review of Scientific Instruments

View full text Add to dashboard Cite

Streak cameras are powerful imaging instruments for studying ultrafast dynamics with the temporal resolution ranging from picosecond to attosecond. However, the confined detection area limits the information capacity of streak cameras, preventing them from fulfilling their potential in lidar, compressed ultrafast photography, etc. Here, we designed and manufactured a large-format streak tube with a large-size round-aperture gate, a spherical cathode, and a spherical screen, leading to an expanded detection area and a high spatial resolution. The simulation results show that the physical temporal resolution of the streak tube is better than 45 ps and the spatial resolutions are higher than 14 lp/mm in the whole area of 24 × 28 mm2 on the cathode. The experiments demonstrate the streak tube’s application potential in weak light imaging benefiting from the imaging magnification of 0.79, a photocathode radiance sensitivity of 37 mA/W, a radiant emitting gain of 11.6 at the wavelength of 500 nm, and a dynamic range higher than 512:1. Most importantly, in the photocathode area of Φ35 mm, the static spatial resolutions at the center and the edge along the slit (R = 16 mm) reach 32 and 28 lp/mm, respectively, and are higher than 10 lp/mm in the whole area of 24 × 28 mm2 on the cathode, allowing for a considerable capacity for spatial information.

show abstract

Numerical simulation of effect of discharge gap on arc characteristics of sheet tungsten electrode under vertical sidewall anode configuration

Cited by 4 publications

References 20 publications

Research progress on numerical simulation of arc discharge plasma process

Research progress on numerical simulation of arc discharge plasma process

Numerical simulation of influence of constraint wall configuration on arc characteristics of sheet tungsten electrode

A large-format streak tube for compressed ultrafast photography

Contact Info

Product

Resources

About