NDLI: Further Studies of the Axisymmetric Disk Wake Using the “Slice POD”

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Peter, B. V. Johansson William, K. George
Copyright Year	2002
Abstract	This paper presents the findings of three experiments using multi-point hot-wire arrays in the high Reynolds number axisymmetric turbulent wake behind a disk. The purpose of the multiple experiments was to validate earlier and less extensive experiments. The ‘slice POD’ was applied to all sets to examine the effects of array coverage and the disk support system. The Reynolds number based on the free stream velocity and disk diameter was kept constant at 28,000. The investigated region spanned from 10 to 60 disk diameters downstream. These results confirm the earlier findings. In particular, the eigenvalues integrated over frequency show a azimuthal mode-1 dominance at x/D = 10 which evolves to a mode-2 dominance by x/D = 50. For all downstream positions, two distinct peaks were found in the first eigenspectrum: one for azimuthal mode-2 at near zero frequency, and another for azimuthal mode-1 at a Strouhal number (fd/U∞) of 0.126. Both peaks decrease in magnitude as the flow evolves downstream, but the peak at the Strouhal number 0.126 decrease more rapidly then the one at near-zero frequency, leaving the latter to eventually dominate.
Sponsorship	Fluids Engineering Division
Starting Page	1151
Ending Page	1157
Page Count	7
File Format	PDF
ISBN	0791836169
DOI	10.1115/FEDSM2002-31411
e-ISBN	0791836002
Volume Number	Volume 2: Symposia and General Papers, Parts A and B
Conference Proceedings	ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
Language	English
Publisher Date	2002-07-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Reynolds number Wake turbulence Wakes Eigenvalues Disks Wire Flow (dynamics)
Content Type	Text
Resource Type	Article

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Investigation of POD Bases for Flow Control on Disk Wakes

Decay of Turbulence in Axisymmetric Wakes

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