Examination of energy spectra moments in a developing turbulent flow
Abstract
Velocity measurements are made in a turbulent developing flow. The experiment is performed in a wind tunnel and consists of a jet ejecting normally into a confined cross stream. Measurements are made by laser velocimetry, with the data sampled and recorded at a high enough rate to allow characterizations of the turbulent fine scales (38,000 sec(exp -1)). Kolmogorov-normalized energy spectra and their moments are constructed, and examined for micro-scale Reynolds number dependence. The data reveals a very well correlated logarithmic relationship between the peak values of moments of the normalized energy spectra and the microstructure Reynolds number.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1991
- Bibcode:
- 1991STIN...9218116M
- Keywords:
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- Energy Spectra;
- Kolmogoroff Theory;
- Laser Doppler Velocimeters;
- Turbulence;
- Turbulent Flow;
- Velocity Measurement;
- Confinement;
- Reynolds Number;
- Wind Tunnels;
- Fluid Mechanics and Heat Transfer