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

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 perturbatio...

Full description

Saved in:
Bibliographic Details
Published in:Experiments in fluids 2006-03, Vol.40 (3), p.372-382
Main Authors: MOCHIZUKI, S, YAMADA, S, OSAKA, H
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fluid dynamics
Fluid flow
Fundamental areas of phenomenology (including applications)
Instrumentation for fluid dynamics
Jets
Perturbation methods
Physics
Reynolds stress
Turbulence
Turbulent flow
Turbulent flows, convection, and heat transfer
Vortices
Walls
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 w super(2) and 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 VW.
ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-005-0074-9