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Optical Detection of Blade FlutterDynamic strain gages mounted on rotor blades are used as the primary instrumentation for detecting the onset of flutter and defining the vibratory mode and frequency. Optical devices are evaluated for performing the same measurements as well as providing supplementary information on the vibratory characteristics. Two separate methods are studied: stroboscopic imagery of the blade tip and photoelectric scanning of blade tip motion. Both methods give visual data in real time as well as video tape records. The optical systems are described, and representative results are presented. The potential of this instrumentation in flutter research is discussed.
Document ID
19770013164
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nieberding, W. C. (NASA Lewis Research Center Cleveland, OH, United States)
Pollack, J. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1977
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-TM-X-73573
E-9022
Report Number: NASA-TM-X-73573
Report Number: E-9022
Meeting Information
Meeting: Intern. Turbine Conf.
Location: Philadelphia
Start Date: March 27, 1977
End Date: March 31, 1977
Sponsors: Am. Soc. of Mech. Engr.
Accession Number
77N20108
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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