IC2’s DirectShear Sensing Systems enable non-intrusive, direct, simultaneous mean and fluctuating wall shear stress measurements.
IC2, a pioneer in the development of micromachined sensors for aerospace applications, will be exhibiting and presenting a technical paper next week at AIAA SciTech 2017 in Grapevine, TX. Billed as “the world’s largest event for aerospace research, development, and technology”, the technical program, running from Jan 9th-13th, is comprised of 11 concurrent technical conferences covering all the latest developments in aerospace technology and science. The exposition hall will feature over 50 companies and organizations and will be open from Jan. 10th-12th.
In booth 203 of the expo hall, IC2 will be featuring our new line of DirectShear Sensing Systems, our latest innovation that offers a robust, high bandwidth, high resolution, silicon micromachined differential capacitive shear stress sensor for subsonic and transonic applications. This innovative design enables direct, non-intrusive, simultaneous mean and fluctuating wall shear-stress measurements, ideal for precise skin-friction measurements in wind-tunnels. This sensor system greatly extends the spatial and temporal resolution capabilities over existing devices as well as the overall accuracy of skin friction measurement technology.
Dr. David Mills of IC2 will also be presenting a technical paper at the conference entitled, “Characterization of a Hydraulically Smooth Wall Shear Stress Sensor for Low-Speed Wind Tunnel Applications”. This talk will be held at 10 AM on Jan. 10th in room Grapevine D.
This paper describes the development and experimental characterization of a wall shear stress sensor system designed to be fully non-invasive to low-speed aerodynamic flows. The differential capacitive microelectromechanical systems (MEMS) sensor is fabricated with backside electrical contacts, eliminating the need for front-side wire bonds. Packaged in a modular housing with interchangeable components, the result is a device with less than ±40 µm of deviation over the wetted surface, satisfying the requirements of hydraulic smoothness for flow speeds less than 30 m/s. Mean shear stress calibration includes a sensitivity of 38.8 mV/Pa with a ±0.2% full-scale accuracy for a 50 Pa maximum wall shear stress. Dynamic calibration includes a 3 dB bandwidth of 1.4 kHz with a 45.0 mV/Pa sensitivity and 60 µPa minimum detectable shear stress at 1.128 kHz.
AIAA-2017-0478, “Characterization of a Hydraulically Smooth Wall Shear Stress Sensor for Low-Speed Wind Tunnel Applications,” D. Mills, Interdisciplinary Consulting Corporation, Gainesville, FL; C. Barnard, M. Sheplak, University of Florida, Gainesville, Gainesville, FL