Three-dimensional or unsteady boundary layers
Abstract
Theoretical and experimental results for unsteady or three-dimensional turbulent boundary layers are reviewed, with particular regard to characteristics which are significant in two-dimensional steady flow. Unsteady flows are examined for the response of the boundary layer oscillation as a function of reduced frequency, and also for the effect of the oscillation on turbulence. The problems of measuring Reynolds stresses in three-dimensional flows are considered, and sonic anemometry as well as single or multiple hot-wire anemometric methods are compared. Finally, the formation of singularities in the boundary layer calculations is discussed by an analysis of the properties of a global system of equations, and the use of inverse methods is examined.
- Publication:
-
ONERA
- Pub Date:
- November 1981
- Bibcode:
- 1981aaaf.collQ....C
- Keywords:
-
- Boundary Layer Stability;
- Three Dimensional Boundary Layer;
- Turbulent Boundary Layer;
- Unsteady Flow;
- Flow Distortion;
- Hot-Wire Anemometers;
- Oscillating Flow;
- Reynolds Stress;
- Singularity (Mathematics);
- Sonic Anemometers;
- Steady Flow;
- Stress Measurement;
- Two Dimensional Boundary Layer;
- Fluid Mechanics and Heat Transfer