Fluctuating wall shear stress in the turbulent boundary layer on a cylinder in axial flow

Anthony Wietrzak*, Richard M Lueptow

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Instantaneous streamwise fluctuations of the wall shear stress have been measured using a hot-element probe in a thick axisymmetric turbulent boundary layer on a cylinder aligned parallel to the flow. The measurements were made at a momentum thickness Reynolds number Rθ=3050 and a boundary layer thickness to cylinder radius ratio of δ/a=5.7. The ratio of the rms of the fluctuation to the mean value of the wall shear stress, τ′/τ̄, is about 0.32. This value is similar to published results for flow over a flat plate. The probability density function of the wall shear stress is similar to that for planar wall-bounded flows within experimental error. The power spectral density of wall shear stress shows that a cylindrical boundary layer contains less energy at lower frequencies and more energy at higher frequencies than other wall-bounded flows.

Original languageEnglish (US)
Title of host publicationFlow Noise Modeling, Measurement, and Control
PublisherPubl by ASME
Pages69-75
Number of pages7
Volume11
ISBN (Print)0791808815
StatePublished - Dec 1 1991
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
Duration: Dec 1 1991Dec 6 1991

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAtlanta, GA, USA
Period12/1/9112/6/91

ASJC Scopus subject areas

  • Mechanical Engineering
  • Acoustics and Ultrasonics

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