Reynolds stress field in a turbulent wall jet induced by a streamwise vortex with periodic perturbation

Reynolds stress field in a turbulent wall jet induced by a streamwise vortex with periodic... An experimental study on the Reynolds stress tensor was conducted in the three-dimensional flow in the plane turbulent wall jet induced by an isolated streamwise vortex generated by the half-delta wing mounted on the wall. Oscillation of the angle of attack of the wing induced a periodic perturbation in the strength of the streamwise vortex. Analysis by triple velocity decomposition and phase averaging shows that the oscillation induces periodic variations in the strength, radius, and position of the streamwise vortex center. The effect of periodic perturbation manifests itself in the magnitude of the Reynolds stress components $$\overline{w^{2}}$$ and $$\overline{vw}.$$ Simulations prove that the periodic variations in the strength, radius, and position of the vortex center can generate an apparent shear stress, denoted herein as $$\overline{\tilde{V}\tilde{W}}.$$ http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Reynolds stress field in a turbulent wall jet induced by a streamwise vortex with periodic perturbation

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Publisher
Springer Journals
Copyright
Copyright © 2005 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-005-0074-9
Publisher site
See Article on Publisher Site

Abstract

An experimental study on the Reynolds stress tensor was conducted in the three-dimensional flow in the plane turbulent wall jet induced by an isolated streamwise vortex generated by the half-delta wing mounted on the wall. Oscillation of the angle of attack of the wing induced a periodic perturbation in the strength of the streamwise vortex. Analysis by triple velocity decomposition and phase averaging shows that the oscillation induces periodic variations in the strength, radius, and position of the streamwise vortex center. The effect of periodic perturbation manifests itself in the magnitude of the Reynolds stress components $$\overline{w^{2}}$$ and $$\overline{vw}.$$ Simulations prove that the periodic variations in the strength, radius, and position of the vortex center can generate an apparent shear stress, denoted herein as $$\overline{\tilde{V}\tilde{W}}.$$

Journal

Experiments in FluidsSpringer Journals

Published: Nov 22, 2005

References

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