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RESEARCH PAPERS: Symposium Papers: Measurement Methods in Rotating Components of Turbomachinery

Flutter Spectral Measurements Using Stationary Pressure Transducers

[+] Author and Article Information
A. P. Kurkov

NASA-Lewis Research Center, Cleveland, OH 44135

J. Eng. Power 103(2), 461-467 (Apr 01, 1981) (7 pages) doi:10.1115/1.3230743 History: Received May 22, 1980; Online November 09, 2009

Abstract

Engine-order sampling was used to eliminate the integral harmonics from the flutter spectra corresponding to a case-mounted static pressure transducer. From the optical displacement data it was demonstrated that blade-order sampling of pressure data can yield erroneous results because of the interference caused by blade vibration. Two methods are presented that effectively eliminate this interference and yield the blade-pressure-difference spectra. The phase difference between the differential-pressure and displacement spectra was evaluated.

Copyright © 1981 by ASME
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