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Variation of axial and radial temperature in an expanded thermal plasma jet

Published online by Cambridge University Press:  15 January 2010

B. BORA ,
M. KAKATI  and
A. K. DAS
B. BORA
Affiliation:
Centre of Plasma Physics, Sonapur 782 402, Assam, India
M. KAKATI
Affiliation:
Thermal Plasma Processed Materials Laboratory, Department of Physics, Dibrugarh University, Dibrugarh, Assam 786 004, India ([email protected])
A. K. DAS
Affiliation:
Laser and Plasma Technology Division, BARC, Mumbai 400 085, India
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Abstract

The distribution of temperature in an expanded thermal plasma jet is investigated by modified Langmuir probes. The validation of classical probe theory in the entire experimental chamber pressure range of 10–100 mbar is thoroughly established before the measurements. The average temperature of the plasma jet at the nozzle exit was also measured by calorimetric estimation of total heat loss from the plasma upstream of that point. A correlation is made using simple analytical expression in between the average temperature measured from the heat loss data and the centerline temperature at the nozzle exit measured by Langmuir probe. The profile parameter n for the radial distribution of temperature in a plasma jet is calculated for different operating current and gas flow rates.

Type
Papers
Information
Journal of Plasma Physics , Volume 76 , Issue 5 , October 2010 , pp. 699 - 707
Copyright
Copyright © Cambridge University Press 2010

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