Abstract
The operational characteristics of a dc non-transferred arc plasma torch have been predicted using the techniques of dynamic similarity. The torch used has a distinct design incorporating both axial plasma generating gas and a shroud gas that initially forms a cold boundary layer but eventually takes part in the plasma formation. The current–voltage characteristics are correlated with electrode heat losses and plasma power for different gas flow conditions using the techniques of dynamic similarity. It is shown that this torch can operate in various power levels at high electro-thermal efficiencies. Unique dimensionless numbers are created for its wide operating regimes. The voltage and operational characteristics are predicted using these numbers for a number of experimental conditions, which are in good agreement with actual experimental results. Predictions are made on the limits of operational characteristics of this torch and class of torches at higher powers.
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References
J. Heberlein, Pure Appl. Chem. 74, 327 (2002)
M.I. Boulos, P. Fauchais, E. Pfender, Thermal Plasma – Fundamentals and Application (Plenum Press, New York, 1994)
H.W. Grunling, W. Mannsmann, J. Phys. IV France 03, C7-903 (1993)
P. Fauchais, T. Renault, N. Hussary, A. Refke, R.H. Henne, A. Hacala, C.D. Chapman, D.E. Deegan, M. Harabowsky, High Temp. Mater. Process. 12, 165 (2008)
J. Feinman, in Plasma Technology in Metallurgical Processing, Iron and Steel Soc. of AIME (1987), p. 500
N. Venkataramani, Curr. Sci. 83, 254 (2002)
R. Benocci, R. Florio, A. Galassi, M. Piselli, C. Sala, M. Sciascia, E. Sindoni, Eur. Phys. J. D 6, 269 (1999)
R. Ramasamy, V. Selvarajan, Eur. Phys. J. Appl. Phys. 7, 87 (1999)
R. Ramasamy, V. Selvarajan, Eur. Phys. J. D 8, 125 (2000)
H. Ayrton, The Electric Arc (D van Nostrand Co., New York, 1902)
W.B. Nottingham, Phys. Rev. 28, 764 (1926)
R.M. Gage, Arc Torch and Process, US patent specifications No. 2858411, United State Patents and Trademarks Office (USPTO), Washington, 1958
O.H. Chang, A. Kaminska, M. Dudeck, J. Phys. III France 7, 1361 (1997)
A. Marotta, J. Eng. Phys. Therophys. 66, 302 (1994)
J.F. Coudert, M.P. Planche, P. Fauchais, Plasma Chem. Plasma Process. 16, S211 (1994)
O.I. Yas’ko, J. Phys. D: Appl. Phys. 2, 733 (1969)
E. Buckingham, Phys. Rev. 4, 345 (1914)
M.F. Zhukov, Linear Direct Current Plasma Torches (Thermal Plasma and New Materials Technology), edited by O.P. Solonenko, M.F. Zhukov (Interscience, Cambridge, 1994)
J.F. Brilhac, B. Pateyron, Plasma Chem. Plasma Process. 15, 257 (1995)
V. Valincis et al., Plasma Sources Sci. Technol. 13, 199 (2004)
M. Hur, K.S. Kim, Plasma Sources Sci. Technol. 12, 255 (2003)
A.M. Paingankar, A.K. Das, V.S. Shirodkar, Plasma Sources Sci. Technol. 8, 100 (1999)
G. Li, W. Pan, Plasma Sources Sci. Technol. 14, 219 (2005)
A.K. Das, K.P. Sreekumar, N. Venkatramani, Plasma Sources Sci. Technol. 3, 108 (1994)
A.B. Murphy, M. Tanaka, J. Phys. D: Appl. Phys. 20, 42 (2009)
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Vadikkeettil, Y., Ravi, G. & Ramachandran, K. Prediction of operational characteristics of a dc non-transferred arc plasma torch using similarity criteria. Eur. Phys. J. D 71, 247 (2017). https://doi.org/10.1140/epjd/e2017-80207-6
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DOI: https://doi.org/10.1140/epjd/e2017-80207-6