Free-stream turbulence effects on the turbulent boundary layer
Abstract
The results of an experimental investigation of the effects of free stream turbulence on a constant pressure turbulent boundary layer are presented. An increase in the fullness of the velocity profile with a consequent decrease in displacement and momentum thickness and an increase in skin friction is found with increasing free stream turbulence level. Measurements of some of the turbulence structural properties show an increase in the turbulence kinetic energy and the turbulent shear stress throughout the boundary layer with increasing free stream turbulence. The turbulent shear stress was found to persist into the free stream, well beyond the usual edge of the boundary layer.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1974
- Bibcode:
- 1974STIN...7510380E
- Keywords:
-
- Free Flow;
- Turbulence Effects;
- Turbulent Boundary Layer;
- Kinetic Energy;
- Shear Stress;
- Skin Friction;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer