Effects of inter-electrode insertion on the performance and thermal flow fields of a hollow-electrode plasma torch

In-Mok YANG; Jun-Seok NAM; Min-Kyu CHOI; Jun-Ho SEO; Shi-Young YANG

doi:10.1088/2058-6272/ab4922

Plasma Science and Technology > 2020 > 22(1): 15403-015403. > DOI: 10.1088/2058-6272/ab4922

In-Mok YANG, Jun-Seok NAM, Min-Kyu CHOI, Jun-Ho SEO, Shi-Young YANG. Effects of inter-electrode insertion on the performance and thermal flow fields of a hollow-electrode plasma torch[J]. Plasma Science and Technology, 2020, 22(1): 15403-015403. DOI: 10.1088/2058-6272/ab4922

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Effects of inter-electrode insertion on the performance and thermal flow fields of a hollow-electrode plasma torch

¹ Department of Applied Plasma Engineering, Chonbuk National University, Jeonju 54896, Republic of Korea
² Graduate School of Flexible & Printable Electronics, Chonbuk National University, Jeonju 54896, Republic of Korea

Funds: This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science and ICT (NRF-2016M1A2A2940152).

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Received Date: April 20, 2019
Revised Date: September 26, 2019
Accepted Date: September 29, 2019

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Abstract

The effects of inter-electrode insertion on the performance of a hollow-electrode plasma torch have been investigated by numerical analysis. Simulation results revealed that when inter-electrodes are inserted, the arc voltages and plasma powers increase due to the increase in the arc length. In addition, it was predicted that thermal efficiency can be improved with the increase in plasma power by injecting plasma gases through the gaps between inter-electrodes. These unique effects of inter-electrode insertion are a result of the plasma temperatures adjusting themselves to increase arc voltages when the arc column is contracted radially by increasing gas-flow rate or decreasing inter-electrode diameter.
- hollow-electrode plasma torch,
- inter-electrodes,
- numerical analysis,
- torch performance

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3.	Jeong, S.-M., Figuera-Michal, D., Lee, D.-H. et al. Control of cathode arc root behavior in a reverse polarity hollow electrode plasma torch using an exit nozzle. Applied Science and Convergence Technology, 2021, 30(6): 167-171. DOI:10.5757/ASCT.2021.30.6.167

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