Stagnation-Point Heat-Transfer Rate in Nitrogen Plasma Flows: Theory and Experiment

[+] Author and Article Information
Arthur F. Okuno, Chul Park

NASA, Ames Research Center, Moffett Field, Calif.

J. Heat Transfer 92(3), 372-384 (Aug 01, 1970) (13 pages) doi:10.1115/1.3449672 History: Received December 10, 1969; Online August 11, 2010


A theory for the heat transfer to the stagnation point of a hemisphere in a supersonic, high-enthalpy, low-density nitrogen plasma flow was developed. The theory assumed a flow that is frozen with respect to molecular dissociation and relaxing with respect to ionization. The calculations for this partially frozen flow yielded heat-transfer rates that were generally lower than predicted by other theories for both frozen and equilibrium flows. Experimental heat-transfer rates from measurements in a high-enthalpy constricted-arc tunnel agreed with the theoretical value within 10 percent in the mean.

Copyright © 1970 by ASME
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