Radiative heat transfer near a stagnation point in the presence of mass injection into the boundary layer

It is shown that the presence in the boundary layer of components with absorption cross sections that are nonzero in the visible region of the spectrum leads to an increase in the radiant flux reaching the surface as compared with the flux reaching the outer edge of the boundary layer. Conditions permitting the determination of the wavelength intervals on which this effect occurs at any values of the optical thicknesses of the boundary layer are obtained. A criterion, from which it follows that in many flow regimes the effect of vapor injection on the increase of the radiant flux reaching the wall can be neglected, is presented.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 5, pp. 21–30, September–October, 1971.