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Test Technologies: Flow Measurement Techniques

Test section of the 9- by 7-foot Unitary Plan Supersonic Wind Tunnel
Test section of the 9- by 7-foot Unitary Plan Supersonic Wind Tunnel at NASA’s Ames Research Center, set up to measure the effects of humidity on sonic boom measurements

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Common means of flow measurement include:

  • Schlieren imaging
  • Particle Image Velocimetry (PIV)
  • Boundary-layer measurements
  • Hot-wire anemometry

These flow measurement techniques may provide information on many different flow characteristics, including:

  • Shock shape and formation
  • Flow separation
  • Laminar or turbulent flow
  • Flow velocity and direction
  • Vortex shedding
  • Wake characteristics

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Last Updated
Jun 01, 2026
Editor
Lillian Gipson
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