Flow Visualizations and Measurements of Turbulent Structures in Drag-Altered Axisymmetric Compressible Base Flows
Bourdon, Christopher Jay
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https://hdl.handle.net/2142/83760
Description
Title
Flow Visualizations and Measurements of Turbulent Structures in Drag-Altered Axisymmetric Compressible Base Flows
Author(s)
Bourdon, Christopher Jay
Issue Date
2001
Doctoral Committee Chair(s)
Dutton, J. Craig
Department of Study
Mechanical Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Aerospace
Language
eng
Abstract
The complex interactions present in the recompression and reattachment regions of the flowfield are shown to de-stabilize the turbulent structure organization. The mean structure statistics of all drag-altered flowfields demonstrate that the dominant organization present upstream is significantly weakened or lost due to passage through these regions. When the base bleed rate is sufficient to inhibit the formation of the primary recirculation region, the structures evident upstream survive into the developing wake region.
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