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Sensor Development for Active Flow ControlPresented are the developmental efforts for MEMS sensors for a closed-loop active flow control in a low-speed wind tunnel evaluation. The MEMS sensors are designed in-house and fabricated out of house, and the shear sensors are a thermal type that are collocated with temperature and pressure sensors on a flexible polyimide sheet, which conforms to surfaces of a simple curvature. A total of 6 sensors are located within a 1.5 by 3 mm area as a cluster with each sensor being 300 pm square. The thickness of this sensor cluster is 75 pm. Outputs from the shear sensors have been compared with respect to those of the Preston tube for evaluation of the sensors on a flat plate. Pressure sensors are the absolute type and have recorded pressure measurements within 0.05 percent of the tunnel ESP pressure sensor readings. The sensors and signal conditioning electronics have been tested on both a flat plate and a ramp in Langley s 15-Inch Low-Turbulence Tunnel. The system configuration and control PC is configured with LabView, where calibration constants are stored for desired compensation and correction. The preliminary test results are presented within.
Document ID
20050214059
Document Type
Conference Paper
Authors
Kahng, Seun K. (NASA Langley Research Center Hampton, VA, United States)
Gorton, Susan A. (NASA Langley Research Center Hampton, VA, United States)
Mau, Johnney C. (NASA Langley Research Center Hampton, VA, United States)
Soto, Hector L. (NASA Langley Research Center Hampton, VA, United States)
Hernandez, Corey D. (Swales Aerospace Hampton, VA, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2001
Publication Information
Publication: NASA Glenn Research Center UEET (Ultra-Efficient Engine Technology) Program: Agenda and Abstracts
Subject Category
Electronics and Electrical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20050214031Analytic PrimaryNASA Glenn Research Center UEET (Ultra-Efficient Engine Technology) Program: Agenda and Abstracts