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Heat transfer to spheres in a confined plasma jet
Author(s) -
Kvbanek G. R.,
Chevalier P.,
Gauvin W. H.
Publication year - 1968
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450460206
Subject(s) - nusselt number , reynolds number , turbulence , jet (fluid) , heat transfer , thermodynamics , mechanics , materials science , spheres , heat transfer coefficient , plasma , chemistry , physics , nuclear physics , astronomy
An experimental study was conducted with a 40 kw. direct‐current nitrogen plasma jet confined in an 8.00‐in. i.d. graphite chamber. The heat transfer rates were determined at a test section located 10.5‐in. below the entry of the jet to water‐cooled 0.625 and 1.000‐in. diameter spheres at temperature differences of up to 5,000°f. and over the Reynolds number ranges of 600 to 4,300. The data were correlated in terms of the Nusselt and Reynolds numbers, with gas properties taken at the bulk temperature. The high intensity of turbulence increased the heat transfer rates to above most of those previously reported, and Reynolds number exponents typical of turbulent systems were obtained.