High Frequency Surface Pressure, Shear Stress and Heat Flux Measurements for High Temperature Applications

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-07-C-0161
Agency Tracking Number: F074-014-0344
Amount: $100,000.00
Phase: Phase I
Program: STTR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: AF07-T014
Solicitation Number: N/A
Small Business Information
DUNS: 113641695
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 (352) 359-7796
Business Contact
Phone: (352) 359-7796
Research Institution
P.O. BOX 116250
GAINESVILLE, FL, 32611 6250
 (352) 846-0582
 Nonprofit college or university
The goal of the proposed project is to develop a robust, high-bandwidth, micromachined Moiré optical-based shear stress sensor with a remote photo-diode/fiber-optic array optical readout for high-temperature, unsteady high-speed flow measurement applications. The time-accurate, continuous, direct measurement of fluctuating wall shear stress is currently not possible. The realization of this capability not only benefits hypersonic vehicle development but impacts a broad application spectrum that ranges from fundamental scientific research to industrial process control, biomedical applications, etc. The proposed sensor consists of a miniature floating element sensor possessing process producing optical gratings on the backside of a floating element and on the top surface of the support wafer to permit backside optical transduction. This design represents a truly flush-mounted, miniature, direct wall shear-stress sensor that possesses immunity from EMI and transverse element movement due to pressure fluctuations and/or vibrations. The optical transduction of the floating element motion is achieved by imaging the Moiré fringe movement via a 16-channel high-temperature, fiber-optic array bundle. This bundle can be several meters long and is attached to a photo-diode array on the non-sensing end. This allows for the electronics to be remotely located away from the high temperatures of the measurement model and facility.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government