Abstract
Numerical solutions for velocity and concentration profiles to the nonsimilar isothermal diffusion laminar boundary-layer equations are given for uniform injection of air, helium and carbon dioxide into an air-free stream having zero streamwise pressure gradient. The results indicate the effects on a nonsimilar boundary layer of mass transfer and large variations in fluid properties which arise from concentration gradients as opposed to temperature gradients. The skin friction decreases in the downstream direction with injection and it is shown that the approach to ‘blowoff ’ (vanishing surface shear) is markedly affected by the molecular mass of the injected gas, moving upstream with decreasing molecular mass.
Reference8 articles.
1. B aron J . R . 1956 The bin ary m IX tu re b o undary layer associated w ith mass transfer cooling a t high speeds. Tech. Rep. In st. Tech. N aval Supersonic Lab. no. 160.
2. Viscous flow past a flat plate with uniform injection
3. Covert E . E . 1959 Some approxim ations to th e solution to th e binary boundary-layer problem . Tech. Rep. In st. Tech. N aval Supersonic Lab. no. 390.
4. A method for the numerical or mechanical solution of certain types of partial differential equations
5. H irschfelder J . O. Curtiss C. F . & Bird R . 1954 Molecular theory of gases and liquids chs. 7 8. New Y ork: J o h n W iley.