A comparison of experimental measurements and theoretical predictions regarding the behavior of a turbulent argon plasma jet discharging into air |
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| Authors: | A H Dilawari J Szekely R Westhoff |
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| Institution: | (1) Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., 02139 Cambridge, Massachusetts;(2) Present address: Institute of Chemical Engineering and Technology, Punjab University, Lahore-20, Pakistan |
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| Abstract: | Computed results are presented describing the temperature and concentration fields obtained when an argon plasma jet is being discharged into ambient air. A previously published mathematical model for turbulent plasma plumes is used for the calculations. These predictions are compared with recent), published experimental measurements by Brossa and Pfender, performed with an enthalpy probe. The theoretical predictions appear to agree reasonably well with the measurements of both the temperature and concentration profiles, with a maximum deviation in the 10–20% range.Notation
A
max
maximum temperature or velocity in the torch exit profile
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C
1
C
2
C
D
constants inK- model
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h
enthalpy
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I
torch current
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K
turbulent kinetic energy per unit mass
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m
mass concentration of plasma p pressure
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Q
How rate of argon through the torch
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r
radial coordinate
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r
n
nozzle radius (inside)
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S
source term for dependent variable |
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| Keywords: | Turbulent argon plasma jet ambient air modelling |
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