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Unsteady Features of Flow Past a Cavity
Measurements of the distributions of total turbulence intensity across the shear layer and corresponding power spectra reveal that the presence of the impingement edge of the cavity decreases the total turbulence intensity by as much as 50% to 80% relative to the case of no edge; this decrease in total intensity is associated with the appearance of well-defined peaks in the power spectrum and a reduction in background turbulence level both at and upstream of impingement. Development of the flow downstream of the impingement edge of the cavity is characterized by a decrease in the maximum value of total turbulence intensity and drastic variations in shapes of the mean velocity and turbulence intensity distributions of the boundary layer. Flow visualization at lower speeds suggests that these characteristics are associated with the distortion of large scale vortical structures convected along the wall downstream of impingement.
Unsteady Features of Flow Past a Cavity
Measurements of the distributions of total turbulence intensity across the shear layer and corresponding power spectra reveal that the presence of the impingement edge of the cavity decreases the total turbulence intensity by as much as 50% to 80% relative to the case of no edge; this decrease in total intensity is associated with the appearance of well-defined peaks in the power spectrum and a reduction in background turbulence level both at and upstream of impingement. Development of the flow downstream of the impingement edge of the cavity is characterized by a decrease in the maximum value of total turbulence intensity and drastic variations in shapes of the mean velocity and turbulence intensity distributions of the boundary layer. Flow visualization at lower speeds suggests that these characteristics are associated with the distortion of large scale vortical structures convected along the wall downstream of impingement.
Unsteady Features of Flow Past a Cavity
Rockwell, Donald (author) / Knisely, Charles (author)
Journal of the Hydraulics Division ; 105 ; 969-979
2021-01-01
111979-01-01 pages
Article (Journal)
Electronic Resource
Unknown
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