Experimental Mechanics

, Volume 22, Issue 1, pp 31–36 | Cite as

Dynamic surface-pressure instrumentation for rods in parallel flow

The instrumentation and methods developed to make the pressure measurements are presented here along with the resolution of several instrumentation problems created by the test conditions
  • T. M. Mulcahy
  • W. Lawrence
  • M. W. Wambsganss


Methods employed and experience gained in measuring random fluid-boundary-layer pressures on the surface of a small-diameter cylindrical rod subject to dense, nonhomogeneous, turbulent, parallel flow in a relatively noise-contaminated flow loop are described. Emphasis is placed on identification of instrumentation problems; description of transducer construction and mounting; and the pretest calibration required to achieve instrumentation capable of reliable data acquisition.


Mechanical Engineer Data Acquisition Fluid Dynamics Reliable Data Parallel Flow 
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rod amplitude at fundamental frequencyf 1


rod diameter


transducer diameter


outside diameter of annular region


hydraulic diameter


fundamental rod frequency


wave numberf/V


stagnation pressure


turbulent eddy-time period


mean flow velocity

\(\varrho _f \)

fluid-mass density

\(\Phi _p \)

spectral density


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Copyright information

© Society for Experimental Mechanics, Inc. 1982

Authors and Affiliations

  • T. M. Mulcahy
    • 1
  • W. Lawrence
    • 1
  • M. W. Wambsganss
    • 1
  1. 1.Components Technology DivisionArgonne National LaboratoryArgonne

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