Abstract
The radiative flux from argon to the stagnation point of a blunt body was considered. Radiative flux and total heat flux measurements were made in a shock heated argon plasma using a shock tube. The radiation intensity was calculated from the Kramers-Unsold theory for the continuum, neglecting the line radiation. By taking the lowering of the ionization potential into account in a consistent fashion, the intensity measurements of Petschek et al. and Olsen were shown to be in agreement. The empirical constants, the critical frequency, and effective nuclear charge squared, were estimated to be 1 X 1015 sec1 and 2.7, respectively, from the structure of the argon atom and the intensity measurements. The radiative heat flux measurements agreed with the predictions within the experimental data scatter. The combined radiative and convective heat flux predictions were in agreement with the total heat flux measurements.
Published Version
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