On the effects of free-stream turbulence on axisymmetric disc wakes

On the effects of free-stream turbulence on axisymmetric disc wakes Wind tunnel experiments have been used to study the effects of free-stream turbulence on the axisymmetric wake behind a disc. The disc and its wake were introduced to various turbulent streams having various levels of turbulence intensity and length scale. It was found that the presence of free-stream turbulence enhances the body’s drag and hence wake momentum deficit, if it is of sufficient strength, changes the far wake’s decay rate and prevents the appearance of self-similarity. The external turbulence causes a significant transformation in the wake’s turbulence structure. This gradually evolves towards the character of the free-stream turbulence itself and thus is characterised by much weaker turbulence (cross-stream) transport processes and a consequent dominance of shear stress production, which acts to maintain the shear stress and mean velocity profiles. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

On the effects of free-stream turbulence on axisymmetric disc wakes

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Publisher
Springer-Verlag
Copyright
Copyright © 2012 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer; Fluid- and Aerodynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-012-1288-2
Publisher site
See Article on Publisher Site

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