The effect of compressibility on the large-scale structure of a turbulent boundary layer
Abstract
Experimental results are presented which show the existence of organized structures in a compressible, turbulent boundary layer. Results were obtained using arrays of hot wires in a Mach 3 zero-pressure gradient boundary layer. The inferred angle from correlations between the hot-wire signals indicates that the average structure is inclined at approximately 45 deg for a large part of the boundary layer. Measurements of the instantaneous angle show a wide distribution of structure angles, the general behavior of the large-scale structures is consistent with the hairpin loop model of wall turbulence. Furthermore, the structures appear to be similar to those found in incompressible boundary layers.
- Publication:
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25th AIAA Aerospace Sciences Meeting
- Pub Date:
- January 1987
- Bibcode:
- 1987aiaa.meetQV...S
- Keywords:
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- Compressibility Effects;
- Compressible Flow;
- Flow Distribution;
- Supersonic Flow;
- Turbulent Boundary Layer;
- Energy Dissipation;
- Hot-Wire Anemometers;
- Incompressible Boundary Layer;
- Mach Number;
- Wall Flow;
- Fluid Mechanics and Heat Transfer