Heat transfer data are reported for partially ionized argon flowing in a water-cooled circular tube, 1/2 in. in dia. Experiments were run with initial mixed-mean temperatures up to 21,000 deg R at Reynolds numbers from 140–527 based on equilibrium properties evaluated at the entrance mixed-mean temperature. Measured plasma flow Nusselt numbers computed on an enthalpy basis correlate well with low temperature, constant property results after the first 5–10 diameters of the tube entrance region; closer to the entrance, Nusselt numbers were about 30 percent higher than constant property entrance region predictions. The tendency of the data to approach the constant property solution rapidly was predicted by a laminar finite-difference analysis for plasma flow published earlier [1]. The analysis was modified for the present study to improve its accuracy. The finite-difference theory under predicts the heat transfer in the first few tube diameters; two possible reasons for this discrepancy are the poor resolution in the inlet enthalpy profiles near the tube wall and nonequilibrium between electrons and heavy particles in this region.
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Heat Transfer From Plasma in Tube Flow
P. S. Schmidt,
P. S. Schmidt
University of Texas at Austin, Austin, Texas
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G. Leppert
G. Leppert
Mechanical Engineering Department, Clarkson College of Technology, Potsdam, N. Y.
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P. S. Schmidt
University of Texas at Austin, Austin, Texas
G. Leppert
Mechanical Engineering Department, Clarkson College of Technology, Potsdam, N. Y.
J. Heat Transfer. Aug 1970, 92(3): 483-489 (7 pages)
Published Online: August 1, 1970
Article history
Received:
September 11, 1969
Revised:
March 9, 1970
Online:
August 11, 2010
Connected Content
A commentary has been published:
Discussion: “Jet Pump Cavitation” (Cunningham, R. G., Hansen, A. G., and Na, T. Y., 1970, ASME J. Basic Eng., 92, pp. 483–492)
A commentary has been published:
Discussion: “Jet Pump Cavitation” (Cunningham, R. G., Hansen, A. G., and Na, T. Y., 1970, ASME J. Basic Eng., 92, pp. 483–492)
Citation
Schmidt, P. S., and Leppert, G. (August 1, 1970). "Heat Transfer From Plasma in Tube Flow." ASME. J. Heat Transfer. August 1970; 92(3): 483–489. https://doi.org/10.1115/1.3449697
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