DURIP A MEMS-BASED PRESSURE-SENSOR ARRAY FOR HYPERSONIC BOUNDARY-LAYER PRESSURE MEASUREMENTS
Abstract
Funding is requested for a high-frequency pressure measurement system based on micro-electromechanical systems (MEMS) technology. The manufacturing technique allows miniaturized pressure transducers to be printed directly onto a substrate, allowing for smaller, more closely-spaced transducers with a higher frequency response than have typically been employed for boundary-layer measurements. The sensors can also be calibrated such that their outputs may be directly compared, which is presently not possible with the current state of the art solution. The system will primarily be applied to boundary-layer stability and transition measurements in high-supersonic and hypersonic flows, where the close spacing, small size, high frequency response, and calibration will combine to allow small groups of sensors to directly measure local wave amplitudes, growth rates, propagation speeds, and propagation speeds all as a function of frequency. Combined, these quantities will greatly improve the ability to study the physics of transition directly as well as to provide robust validation for computations and transition models. In addition to transition research, the sensors will be employed in experiments focused on shock/boundary-layer interactions and shock/shock interactions. The system is comprised of several stages of components from three manufacturers. The transducers are designed and produced by IC2, who have developed a number of shear stress sensors, microhpones, and pressure transducers in recent years through a series of SBIR and STTR programs. These sensors will be powered and conditioned by a signal conditioning system provided by Precision Filters, Inc., who have a long history of producing high-quality, high-channel-count signal conditioning systems. Finally, data acquisition will be performed by high-speed analog-to-digital converters produced by National Instruments.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2021
- Source ID
- FA95502010180
Entities
People
- Stuart A. Craig
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Arizona