Conditionally Analyzed Mean Velocity and Turbulence Measurements in a Plume-Induced Boundary Layer Separated Flowfield
Palko, Carl Wayne
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https://hdl.handle.net/2142/83965
Description
Title
Conditionally Analyzed Mean Velocity and Turbulence Measurements in a Plume-Induced Boundary Layer Separated Flowfield
Author(s)
Palko, Carl Wayne
Issue Date
1998
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)
Physics, Fluid and Plasma
Language
eng
Abstract
The shock-induced separation process was found to dramatically increase the streamwise and transverse Reynolds normal stresses (which both peak near reattachment), the primary shear stress, and the normal stress anisotropy. The shock-separated shear layer consists of only a single layer with a large initial growth rate followed by a much smaller growth rate, instead of the two layers found in rapidly expanded shear layers. The large-scale structures in the shock-separated shear layer span the shear layer width and exhibit a uniform transverse size. These structures display positive and negative shear stresses on their upper and lower edges, respectively, and are greatly altered by reattachment. All turbulent stresses decrease and the normal stress isotropy increases in the developing wake.
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