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

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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.

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Acknowledgments

The authors would like to thank Prof. A. B. Murphy from CSIRO Materials Science and Engineering, Australia for his helpful advice and thermodynamic and transport property data for oxygen plasma.

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Authors and Affiliations

  1. Plasma Laboratory, Institute of Modern Physics, Fudan University, Shanghai, 200433, China

    Qianhong Zhou, Feng Liu, Shaofeng Guo, Wenkang Guo & Ping Xu

  2. Department of Thermal Science & Energy Engineering, University of Science & Technology of China, Hefei, 230027, China

    Hui Li

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  1. Qianhong Zhou
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Correspondence to Qianhong Zhou.

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Zhou, Q., Li, H., Liu, F. et al. Effects of Nozzle Length and Process Parameters on Highly Constricted Oxygen Plasma Cutting Arc. Plasma Chem Plasma Process 28, 729–747 (2008). https://doi.org/10.1007/s11090-008-9154-y

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  • DOI: https://doi.org/10.1007/s11090-008-9154-y

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