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Related Experiment Videos

Extensional bundle waveguide techniques for measuring flow of hot fluids.

Lawrence C Lynnworth1, Yi Liu, John A Umina

  • 1GE Panametrics. larry@kynosoura.com

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|August 3, 2005
PubMed
Summary

A novel acoustic waveguide assembly using slender metal rods acts as a thermal buffer for flow measurement transducers. This dispersion-free design effectively protects sensitive equipment in extreme temperatures, from cryogenic to 600°C.

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Area of Science:

  • Materials Science
  • Acoustics
  • Fluid Dynamics

Background:

  • Flow measurement in extreme temperatures requires robust thermal buffering.
  • Conventional methods face limitations with high-temperature fluids and hazardous environments.
  • Transducer protection is critical for accurate and reliable flow data acquisition.

Purpose of the Study:

  • To develop and characterize a dispersion-free waveguide assembly for thermal buffering.
  • To enable accurate flow measurements in high-temperature gas, steam, and liquid media.
  • To enhance transducer longevity and performance in harsh industrial conditions.

Main Methods:

  • Construction of a waveguide assembly from tightly packed, acoustically slender metal rods within a sheath.
  • Material selection based on fluid compatibility, acoustic properties, and temperature resistance (e.g., 316SS, titanium).

Related Experiment Videos

  • Testing in gas, steam, and liquid flow applications across a wide temperature range (-160°C to 600°C).

    • Main Results:

    • The waveguide assembly demonstrated dispersion-free acoustic wave propagation.
    • Effective thermal buffering was achieved, protecting transducers from extreme temperatures.
    • Successful flow measurements were conducted in challenging conditions, including high-velocity gas flows up to 300°C.

    Conclusions:

    • The developed acoustic waveguide assembly provides a reliable thermal buffer for flow measurement transducers.
    • This technology extends the operational range of flow measurement systems to extreme temperatures and fluid types.
    • The design offers a significant advancement for industrial flow monitoring in demanding environments.