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IC2 Introduces Industry-First Microsensor to Directly Measure Shear Stress in Wind Tunnels


News provided by

IC2

Feb 22, 2018, 07:15 ET

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GAINESVILLE, Fla., Feb. 22, 2018 /PRNewswire/ -- IC² announced today an industry-first microsensor capable of directly measuring time-resolved wall shear stress in wind tunnel testing.  Reducing aerodynamic drag is a major factor to improving fuel efficiency of aircraft and automobiles, but accurately measuring wall shear stress has historically been very difficult. Existing sensor technology cannot accurately measure wall shear stress and so aerospace engineers have had to rely on uncertain correlations to estimate it — until now.  Building on two decades of research and testing, IC²'s DirectShear™ Sensors measure wall shear stress directly to deliver an unprecedented degree of precision and accuracy for both mean and fluctuating measurements with exceptional bandwidth and dynamic range.

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IC² announces an industry-first sensor for direct measurement of shear stress in wind tunnel aerodynamics testing. The sensor enables aerospace engineers to take measurements not previously possible, helping them to design vehicles (aircraft and automobiles) with reduced aerodynamic drag and improved fuel efficiency.
IC² announces an industry-first sensor for direct measurement of shear stress in wind tunnel aerodynamics testing. The sensor enables aerospace engineers to take measurements not previously possible, helping them to design vehicles (aircraft and automobiles) with reduced aerodynamic drag and improved fuel efficiency.

The Technology and its Benefits

DirectShear Sensors are robust, high-bandwidth, high-resolution, silicon-micromachined differential capacitive shear stress sensors.  The sensors directly measure wall shear stress through a micromachined (MEMS) sensing head with backside contacts. DirectShear Sensors bypass the limitations of existing devices, providing non-intrusive, highly accurate, quantitative measurements with reduced uncertainty.  This approach enables a number of important features and benefits, including:

  • Direct capacitive transduction to ensure time-resolved, accurate measurements and remove the need for a unique calibration between heat transfer and shear stress.
  • Hydraulically smooth sensor with backside contacts to eliminate any disturbances to the flow.
  • Micromachining to enable high spatial resolution and high-performance operation, offering bandwidths up to 20 kHz and dynamic ranges up to 110 dB.

Originally developed for NASA, the sensors are now commercially available and are ideal for precise shear-stress measurements.  A suite of sensor models is available for varying applications and requirements.

Applications

  • Instrumentation-grade skin friction measurement in subsonic and transonic wind tunnels
  • Fundamental scientific research - aerodynamic drag, turbulence, etc.
  • Detection of flow separation

For more information on this product, visit https://www.thinkic2.com/products/shear-stress-sensors/directshear/.

About IC²

IC², headquartered in Gainesville, FL, delivers precision sensors that push the envelope of aerospace measurement accuracy and performance.  IC²'s sensors and instrumentation are designed from the ground up to meet the challenging environments of the aerospace industry.

From wind tunnels and ground test facilities to flight test platforms, IC² delivers scientific-grade measurement tools that provide unprecedented performance, including:

  • Higher bandwidth and dynamic range
  • Greater accuracy and precision
  • Higher spatial resolution
  • Ability to operate in environments too extreme for most sensors

For more information, visit www.thinkic2.com .

SOURCE IC2

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