Blunt body flow of a viscous radiating gas

Abstract

THE results of a number of papers D-41 show that in the calculation of the blunt body flow of a hypersonic air stream taking radiation into account, it is necessary to take into consideration the radiation cooling of the shock layer, the absorption of energy and the dependence of the absorption coefficient not only on the temperature and density, but also on the frequency. The radiation cooling may lead to the appearance of a significant temperature gradient in the main part of the shock wave, which throws some doubt on possibility of dividing the shock layer into a region of non-viscous flow and a boundary layer. When there is absorption the radiative transfer of energy leads to interaction between the main and boundary flow regions. It is extremely difficult to take account of consideration of these regions of the shock layer, especially if we take into account the complex nature of the dependence of the absorption coefficient of air on the frequency. Therefore, in studying the blunt flow of radiating air taking into account radiation cooling and absorption, it is necessary at the same time to consider the entire flow between the shock wave and the frontal surface of the body.