Three-dimensional simulation of an argon–hydrogen DC non-transferred arc plasma torch

Guo, Z, Yin, S, Liao, H and Gu, S (2014) Three-dimensional simulation of an argon–hydrogen DC non-transferred arc plasma torch International Journal of Heat and Mass Transfer, 80. pp. 644-652.

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Abstract

Simulations of a DC non-transferred arc plasma torch operating with argon–hydrogen have been performed by using a three-dimensional model. An artificially high electrical conductivity layer is employed to allow the current passing through the low temperature region near the anode wall. A new way by using two equations to describe the current density distribution is developed. Besides, a new method for determining the location of the arc-root attachment is proposed, in which the minimum total heat transfer rate through the anode wall is considered as the criterion for the lowest energy loss. Based on this criterion, the real arc core radius and length are predicted. Moreover, the influences of arc current and mass flow rate on the plasma arc characteristics are also investigated. The results obtained show that the location of the arc-root attachment predicted by the minimum total heat transfer rate principle is in good agreement with the previous work and the experimental data. Additionally, it is found that arc length can be reduced by increasing current or decreasing flow rate. Also, higher current and flow rate lead to higher temperature and velocity inside the plasma torch.

Item Type:	Article
Subjects :	Chemical & Process Engineering
Divisions :	Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :	Name Email ORCID Guo, Z Yin, S Liao, H Gu, S
Date :	16 October 2014
DOI :	10.1016/j.ijheatmasstransfer.2014.09.059
Copyright Disclaimer :	© 2014. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords :	Non-transferred arc, Current density
Depositing User :	Symplectic Elements
Date Deposited :	28 Jun 2016 17:44
Last Modified :	31 Oct 2017 18:24
URI:	http://epubs.surrey.ac.uk/id/eprint/811068

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