Turbulent boundary layers with wall injection
Abstract
The method of Bradshaw, Ferriss, and Atwell (1967) is used to calculate the perturbed flow region downstream of a discontinuity in surface injection. The turbulent energy equation is converted into an equation for shear stress by assuming three empirical functions relating the turbulent intensity, diffusion, and dissipation to the shear stress profile. It is concluded that the relaxation length downstream of either a step up or a step down in wall injection is well in excess of 35 times the boundary layer thickness immediately upstream of the discontinuity when the relaxation of the turbulence structure is taken into account.
 Publication:

AIAA Journal
 Pub Date:
 July 1975
 DOI:
 10.2514/3.60483
 Bibcode:
 1975AIAAJ..13..952A
 Keywords:

 Boundary Layer Control;
 Fluid Injection;
 Shear Stress;
 Turbulent Boundary Layer;
 Velocity Distribution;
 Flow Velocity;
 Pressure Effects;
 Reynolds Stress;
 Wall Flow;
 Fluid Mechanics and Heat Transfer