Low-wavenumber turbulent boundary layer wall-pressure measurements from vibration data on a cylinder in pipe flow

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Abstract

The response of a structure to turbulent boundary layer (TBL) excitation has been an area of research for roughly 50 years, although uncertainties persist surrounding the low-wavenumber levels of the TBL surface pressure spectrum. In this experimental investigation, a cylindrical shell with a smooth internal surface is subjected to TBL excitation from water in fully developed pipe flow. The cylinder's vibration response to this excitation is used to determine Iow-wavenumber TBL surface pressure levels at lower streamwise wavenumbers than previously reported (k/1/kc<0.01). An experimental modal analysis is also conducted on the water-filled cylindrical shell to determine structural parameters which are used to extract TBL pressures. The measured Iow-wavenumber pressure data falls midway between TBL models by Smol'yakov [Acoustical Physics 52(3) (2006) 331-337] and Chase \Journal of Sound and Vibration 112(1) (1987) 125-147] and is roughly 23 dB lower than an early TBL model by Coreos [Journal of the Acoustical Society of America 35(2) (1963) 192-198]. The current data is a few decibels below the lower bound of related measurements in air by Farabee and Geib [ICIASF 75 Record, 1975, pp. 311-319] and Martin and Leehey [Journal of Sound and Vibration 52(1) (1977) 95-120]. A simple wavenumber white form for the TBL surface pressure spectrum at Iow-wavenumber is suggested.

Original languageEnglish (US)
Pages (from-to)4166-4180
Number of pages15
JournalJournal of Sound and Vibration
Volume329
Issue number20
DOIs
StatePublished - Jan 1 2010

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wall pressure
pipe flow
turbulent boundary layer
Pipe flow
pressure measurement
Pressure measurement
Boundary layers
vibration
cylindrical shells
Vibrations (mechanical)
Acoustic waves
excitation
acoustics
Modal analysis
water
Water
Physics
physics
air
Air

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "The response of a structure to turbulent boundary layer (TBL) excitation has been an area of research for roughly 50 years, although uncertainties persist surrounding the low-wavenumber levels of the TBL surface pressure spectrum. In this experimental investigation, a cylindrical shell with a smooth internal surface is subjected to TBL excitation from water in fully developed pipe flow. The cylinder's vibration response to this excitation is used to determine Iow-wavenumber TBL surface pressure levels at lower streamwise wavenumbers than previously reported (k/1/kc<0.01). An experimental modal analysis is also conducted on the water-filled cylindrical shell to determine structural parameters which are used to extract TBL pressures. The measured Iow-wavenumber pressure data falls midway between TBL models by Smol'yakov [Acoustical Physics 52(3) (2006) 331-337] and Chase \Journal of Sound and Vibration 112(1) (1987) 125-147] and is roughly 23 dB lower than an early TBL model by Coreos [Journal of the Acoustical Society of America 35(2) (1963) 192-198]. The current data is a few decibels below the lower bound of related measurements in air by Farabee and Geib [ICIASF 75 Record, 1975, pp. 311-319] and Martin and Leehey [Journal of Sound and Vibration 52(1) (1977) 95-120]. A simple wavenumber white form for the TBL surface pressure spectrum at Iow-wavenumber is suggested.",
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N2 - The response of a structure to turbulent boundary layer (TBL) excitation has been an area of research for roughly 50 years, although uncertainties persist surrounding the low-wavenumber levels of the TBL surface pressure spectrum. In this experimental investigation, a cylindrical shell with a smooth internal surface is subjected to TBL excitation from water in fully developed pipe flow. The cylinder's vibration response to this excitation is used to determine Iow-wavenumber TBL surface pressure levels at lower streamwise wavenumbers than previously reported (k/1/kc<0.01). An experimental modal analysis is also conducted on the water-filled cylindrical shell to determine structural parameters which are used to extract TBL pressures. The measured Iow-wavenumber pressure data falls midway between TBL models by Smol'yakov [Acoustical Physics 52(3) (2006) 331-337] and Chase \Journal of Sound and Vibration 112(1) (1987) 125-147] and is roughly 23 dB lower than an early TBL model by Coreos [Journal of the Acoustical Society of America 35(2) (1963) 192-198]. The current data is a few decibels below the lower bound of related measurements in air by Farabee and Geib [ICIASF 75 Record, 1975, pp. 311-319] and Martin and Leehey [Journal of Sound and Vibration 52(1) (1977) 95-120]. A simple wavenumber white form for the TBL surface pressure spectrum at Iow-wavenumber is suggested.

AB - The response of a structure to turbulent boundary layer (TBL) excitation has been an area of research for roughly 50 years, although uncertainties persist surrounding the low-wavenumber levels of the TBL surface pressure spectrum. In this experimental investigation, a cylindrical shell with a smooth internal surface is subjected to TBL excitation from water in fully developed pipe flow. The cylinder's vibration response to this excitation is used to determine Iow-wavenumber TBL surface pressure levels at lower streamwise wavenumbers than previously reported (k/1/kc<0.01). An experimental modal analysis is also conducted on the water-filled cylindrical shell to determine structural parameters which are used to extract TBL pressures. The measured Iow-wavenumber pressure data falls midway between TBL models by Smol'yakov [Acoustical Physics 52(3) (2006) 331-337] and Chase \Journal of Sound and Vibration 112(1) (1987) 125-147] and is roughly 23 dB lower than an early TBL model by Coreos [Journal of the Acoustical Society of America 35(2) (1963) 192-198]. The current data is a few decibels below the lower bound of related measurements in air by Farabee and Geib [ICIASF 75 Record, 1975, pp. 311-319] and Martin and Leehey [Journal of Sound and Vibration 52(1) (1977) 95-120]. A simple wavenumber white form for the TBL surface pressure spectrum at Iow-wavenumber is suggested.

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