Earlier work in the area of turbulent boundary layers driven by an organized outer flow oscillation is essentially confined to quasi-steady modeling of the Reynolds stress. This model as well as the more straightforward model of quasi-laminar oscillations are re-examined. The analysis is based on an asymptotic expansion in powers of the amplitude parameter. The method permits the decomposition of the Reynolds stress to components that drive independently the mean flow and the organized oscillation. Truly unsteady Reynolds stress models are further proposed. Results are provided for comparison of the simple quasi-steady and quasi-laminar models with the unsteady models and the experimental information available today. Considerable improvement is accomplished especially in the small frequency region. (DePo)
Turbulence models for oscillating boundary layers
Turbulenzmodelle fuer oszillierende Grenzschichten (Flugzeugbau)
AIAA-Papers ; Jan ; 1-12
1979
12 Seiten, 15 Bilder, 36 Quellen
Aufsatz (Konferenz)
Englisch
Turbulence models for oscillating boundary layers
AIAA | 1979
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