Flutter spectral measurements using stationary pressure transducers
Abstract
The paper deals with an analysis procedure, based on engine-order sampling, which eliminates effectively the engine harmonics from the overall flutter spectra obtained with a case-mounted static pressure transducer. Qualitative spectral analyses of pressure data, performed on the basis of blade order sampling, are examined. The interference of blade motion with the pressure signal in the steep gradient portion of the blade passage is demonstrated, using optimal displacement spectra. Two methods which remove the contribution of blade motion from the blade-pressure-difference spectra are described.
- Publication:
-
Measurement Methods in Rotating Components of Turbomachinery
- Pub Date:
- 1980
- Bibcode:
- 1980mmrc.proc..225K
- Keywords:
-
- Engine Tests;
- Flutter Analysis;
- Pressure Sensors;
- Vibration Measurement;
- Displacement Measurement;
- Pressure Gradients;
- Spectrum Analysis;
- Instrumentation and Photography