NEW TYPE TURBULENCE GAUGE FOR USE IN LIQUIDS

The aerofoil probe method of measuring turbulence has been successfully adapted for use in liquids. The new instrument offers considerable advantage over its main competitor/ the hot film anenometer. The key feature of the probe is a very small lift force sensor which responds to angle of attack fluctuations in the oncoming flow. A piezoelectric transducer generates an output voltage which varies linearly with the lift force and hence with the v or w component of turbulence velocity. In its present configuration the probe comprises an axisymmetric lift sensor of 0.095 in. diameter coupled directly to a miniature preamplifier unit (0.25 in. diameter). Turbulence measurements in the wakes of cylinder models mounted in a water tunnel indicate uniform frequency response over a nominal range of 1 Hz to 500 Hz, with signal/noise ratios as large as 1000 to 1. Application considerations and methods of calibration are discussed.

• Supplemental Notes:
  • Flow: Its Meas and Control in Sci and Ind, Symp, Proceedings, V1, Pt1, Pittsburgh, Pa., May 9-14, 1971.
• Corporate Authors:

  Instrument Society of America

  400 Stanwix Street
  Pittsburgh, PA  United States  15222
• Authors:
  • Siddon, T E
• Conference:
  • Flow: Its Meas and Control in Sci and Ind, Symp, Proceedings, V1, Pt1, Pittsburgh, Pa., May 9-14, 1971.
• Publication Date: 1974

Media Info

• Features: References;
• Pagination: p. 435-439

Subject/Index Terms

• TRT Terms: Probes (Measuring devices); Turbulence; Velocity; Wakes
• Old TRIS Terms: Turbulence probes; Velocity fluctuations; Wake measurement
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00128732
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jan 14 1976 12:00AM