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Large-scale vortex structures in turbulent wakes behind bluff bodies. Part 1. Vortex formation processes

Published online by Cambridge University Press:  21 April 2006

A. E. Perry  and
T. R. Steiner
A. E. Perry
Affiliation:
Department of Mechanical Engineering, University of Melbourne, Parkville, 3052, Victoria, Australia
T. R. Steiner
Affiliation:
Department of Mechanical Engineering, University of Melbourne, Parkville, 3052, Victoria, Australia
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Abstract

An investigation of turbulent wakes was conducted and phase-averaged velocity vector fields are presented, as well as phase-averaged and global Reynolds normal and shear stresses. The topology of the phase-averaged velocity fields is discussed in terms of critical point theory. Here in Part 1, the vortex formation process in the cavity region of several nominally two-dimensional bluff bodies is investigated and described using phase-averaged streamlines where the measurements were made in a nominal plane of symmetry. It was found that the flows encountered were always three-dimensional and that the mean-flow patterns in the cavity region were quite different from those expected using classical two-dimensional assumptions.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 174 , January 1987 , pp. 233 - 270
Copyright
© 1987 Cambridge University Press

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