Convective wave speed and spectral features of turbulent boundary layers
Abstract
Attention is given to the convective wave speed and power spectral behavior in steady free-stream, zero, and favorable pressure gradient turbulent boundary layers. Mean flow parameters are obtained to attest to the two-dimensionality of the test flows and the measured spectral data, and convective wave speeds are compared with published data. In the inner region of the boundary layer, the convective wave speed is higher than the local mean velocity for all eddy scales as observed previously. It is shown that the improper use of the Taylor hypothesis in the power spectra measurement can lead to a significant error in the low wave number range.
- Publication:
-
25th AIAA Aerospace Sciences Meeting
- Pub Date:
- January 1987
- Bibcode:
- 1987aiaa.meetW....A
- Keywords:
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- Convective Flow;
- Flow Velocity;
- Spectral Methods;
- Turbulent Boundary Layer;
- Flow Measurement;
- Power Spectra;
- Vortices;
- Fluid Mechanics and Heat Transfer