Low wavenumber turbulent boundary layer fluctuating wall shear stress measurements from vibration data on a cylinder in pipe flow

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

Abstract

Fluctuating wall shear stress under turbulent boundary layer (TBL) excitation is studied in this experimental investigation. A cylindrical shell with a smooth internal surface is subjected to TBL excitation from water in fully developed pipe flow at 6.1 m/s. The vibration response of the cylinder is used to inversely determine low wavenumber TBL shear stress levels. Both the cross-flow and streamwise directions are examined using directionally uncoupled low-order cylinder modes in the circumferential and axial directions. This data addresses a critical gap in available literature regarding experimental low wavenumber shear stress data. The low wavenumber shear stress levels in both the cross-flow and streamwise directions are determined to be roughly 10 dB higher than those of normal pressure. As is the case for various models of TBL pressure, these measurements suggest that a nearly constant value for normalized shear stress at low wavenumber is valid over a broad range of frequencies. A simple wavenumber white model form established for low wavenumber TBL surface pressure is also shown to be appropriate for shear stress.

Original languageEnglish (US)
Title of host publication24th National Conference on Noise Control Engineering 2010, Noise-Con 10, Held Jointly with the 159th Meeting of the Acoustical Society of America
Pages847-859
Number of pages13
StatePublished - Dec 1 2010
Event24th National Conference on Noise Control Engineering 2010, Noise-Con 2010, Held Jointly with the 159th Meeting of the Acoustical Society of America - Baltimore, MD, United States
Duration: Apr 19 2010Apr 21 2010

Publication series

Name24th National Conference on Noise Control Engineering 2010, Noise-Con 10, Held Jointly with the 159th Meeting of the Acoustical Society of America
Volume2

Other

Other24th National Conference on Noise Control Engineering 2010, Noise-Con 2010, Held Jointly with the 159th Meeting of the Acoustical Society of America
CountryUnited States
CityBaltimore, MD
Period4/19/104/21/10

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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