TITLE

Effects of Nozzle Length and Process Parameters on Highly Constricted Oxygen Plasma Cutting Arc

AUTHOR(S)
Qianhong Zhou; Hui Li; Feng Liu; Shaofeng Guo; Wenkang Guo; Ping Xu
PUB. DATE
December 2008
SOURCE
Plasma Chemistry & Plasma Processing;Dec2008, Vol. 28 Issue 6, p729
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The influence of nozzle length and two process parameters (arc current, mass flow rate) on the plasma cutting arc is investigated. Modeling results show that nozzle length and these two process parameters have essential effects on plasma arc characteristics. Long nozzle torch can provide high velocity plasma jet with high heat flux. Both arc voltage and chamber pressure increase with the nozzle length. High arc current increases plasma velocity and temperature, enhances heat flux and augments chamber pressure and thus, the shock wave. Strong mass flow has pinch effect on plasma arc inside the torch, enhances the arc voltage and power, therefore increases plasma velocity, temperature and heat flux.
ACCESSION #
47521893

 

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