The effect of gas flow on argon plasma discharge generated with a single-electrode configuration at atmospheric pressure

2009 ◽  
Vol 16 (9) ◽  
pp. 093501 ◽  
Author(s):  
Shou-Zhe Li ◽  
Wen-Tong Huang ◽  
Dezhen Wang
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Argon Plasma ◽  
Plasma Discharge ◽  
Electrode Configuration

Influence of oxygen traces on an atmospheric-pressure radio-frequency capacitive argon plasma discharge

2011 ◽  
Vol 18 (10) ◽  
pp. 103502 ◽  
Author(s):  
Shou-Zhe Li ◽  
Qi Wu ◽  
Wen Yan ◽  
Dezhen Wang ◽  
Han S. Uhm
Keyword(s):  
Radio Frequency ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Plasma Discharge

scholarly journals Cold Atmospheric Pressure Gliding arc Plasma Jet for Decontamination

2016 ◽  
Vol 24 (3S2) ◽  
pp. 103-108
Author(s):  
Do Hoang Tung ◽  
Bach Sy Minh ◽  
Vu Thi Thom ◽  
Lam Thi Huyen Trang ◽  
Cao Thi Huong ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Room Temperature ◽  
Plasma Jet ◽  
Plasma Discharge ◽  
Arc Plasma ◽  
Gliding Arc ◽  
Gliding Arc Plasma ◽  
Ar Gas

A cold atmospheric pressure gliding arc plasma jet hasbeen developed and applied to disinfection. The size of the plasma output is about 6 mm in diameter and 10 mm in length. Ar gas at a flow rate of 10 slm and 25 W plasma power are used. Plasma discharge is produced between the divergent electrodes and the jet appears as an effluence of the gas flow. When a \textnormal{pseudomonas} culture is placed at 8 mm below the torch for 1minute, where the gas is at room temperature, the bacteria within a 16 mm diameter circle are almost completely killed. As the UV radiation is well below the safety regulation, the bacteria are inactivated by the total effect of UV radiation and others like the reactive species and the charged particles.

scholarly journals Electrical, thermal and optical characteristics of plasma torch

2019 ◽  
Vol 13 (27) ◽  
pp. 151-156
Author(s):  
Ali A-K. Hussain
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Low Cost ◽  
Argon Plasma ◽  
Maximum Value ◽  
Gas Plasma ◽  
Ac Power ◽  
Set Up ◽  
Ar Gas ◽  
Plasma Electrode

Non thermal argon plasma needle at atmospheric pressure was constructed. The experimental set up was based on simple and low cost electric components that generate electrical field sufficiently high at the electrodes to ionize various gases which flow at atmospheric pressure. A high AC power supply was used with 9.6kV peak to peak and 33kHz frequency. The plasma was generated using two electrodes. The voltage and current discharge waveform were measured. The temperature of Ar gas plasma jet at different gas flow rate and distances from the plasma electrode was also recorded. It was found that the temperature increased with increasing frequency to reach the maximum value at 15 kHz, and that the current leading the voltage, which demonstrates the capacitive character of the discharge. The electron temperature was measured at about 0.61 eV, and we calculated the electron number density to be 4.38×1015 cm-3.

Numerical study of atmospheric-pressure argon plasma jet propagating into ambient nitrogen

2021 ◽  
Author(s):  
Yuan yuan Jiang ◽  
Yanhui Wang ◽  
Yamin Hu ◽  
Jiao Zhang ◽  
Dezhen Wang
Keyword(s):  
Flow Velocity ◽  
Atmospheric Pressure ◽  
Propagation Velocity ◽  
Gas Flow ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Propagation Length ◽  
Jet Length ◽  
Gas Flow Velocity ◽  
Argon Plasma Jet

Abstract In this paper, a two-dimensional fluid model is used to study the properties of atmospheric-pressure argon plasma jet propagating into ambient nitrogen driven by a pulsed voltage, emphasizing the influence of gas velocity on the dynamic characteristics of the jet. The simulation results show that the argon jet exhibits a cylindrical shape channel and with the increase of propagation length, the jet channel gradually shrinks. The jet propagation velocity varies with time. Inside the dielectric tube, the plasma jet accelerates propagation and reaches its maximum value near the nozzle. Exiting from the tube, the propagation velocity of the plasma jet quickly decreases and when approaching the metal plane, the decrease of jet velocity slows down. The increase of gas speed leads to the variation of the jet spatial distribution. The electron density presents a solid structure at lower gas flow speeds, whereas an annular structure can be observed under the higher gas flow velocity in the ionization head. The jet length increases with the gas flow velocity. However, when the flow velocity exceeds a critical value, the increased rate of the plasma jet length becomes slow. Additionally, the influence of the gas flow speed on the production and transport of the reactive species is also studied and discussed.

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