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Fluctuating Shear Stress Calibration Method Using a Channel Flow

[+] Author Affiliations
Daniel C. Cole, Michael L. Jonson

The Pennsylvania State University, University Park, PA

Kendra V. Sharp

Oregon State University, Corvallis, OR

Paper No. IMECE2010-37526, pp. 113-123; 11 pages
doi:10.1115/IMECE2010-37526
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 13: Sound, Vibration and Design
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4450-2
  • Copyright © 2010 by ASME

abstract

Fluctuating wall shear stress causes vibration and radiated noise from a structure. In the past wall shear stress has been measured indirectly using hot wires and hot films. Recently direct shear sensors have been developed. In this paper a calibration device consisting of a 305 mm × 60 mm × 5 mm channel filled with glycerin is used to calibrate a direct shear stress sensor with amplitudes up to 10 Pa of shear stress over a frequency range from 10 Hz to 1 kHz. The analytically known flow field caused by an oscillating plate 5 mm from the sensor is verified using laser Doppler velocimetry (LDV). The flow field is derived using a frequency-wavenumber approach thereby allowing for a known spatial and temporal field to be generated by specifying a derived plate vibration.

Copyright © 2010 by ASME

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