Relaxation of Turbulent Boundary Layer Submitted to Sudden Distortion at the Wall

An experimental investigation is carried out in the turbulent boundary layer subjected to a sudden transverse strain, which generates strong three-dimensional effects. Particular attention is focused on the reorganization of the distorted boundary layer into a two-dimensional one on a stationary cyl...

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Bibliographic Details
Published in:AIAA journal 2002-01, Vol.40 (1), p.58-66
Main Authors: Bouda, N. Nait, Benabid, T, Fulachier, L
Format: Article
Language:English
Subjects:
Aerodynamics
Boundary conditions
Boundary layer and shear turbulence
Boundary layers
Cylinders (shapes)
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Mechanical engineering
Physics
Rotating machinery
Rotation
Strain
Three dimensional
Turbulence
Turbulent flows, convection, and heat transfer
Two dimensional
Velocity
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Summary:An experimental investigation is carried out in the turbulent boundary layer subjected to a sudden transverse strain, which generates strong three-dimensional effects. Particular attention is focused on the reorganization of the distorted boundary layer into a two-dimensional one on a stationary cylinder downstream an axially rotating part. The physical behavior of the flow is analyzed through the mean and turbulent velocity field. The results show three zones: an interaction zone where the flow responds to the new boundary condition (cessation of spin), an adjacent one where the influence of the rotation remains persistent on the flow structure, and an outer undisturbed zone where the flow remains in equilibrium.
ISSN:0001-1452
1533-385X
DOI:10.2514/2.1641