Fast Response Wall Pressure Measurement as a Means of Gas Turbine Blade Fault Identification

[+] Author and Article Information
K. Mathioudakis, A. Papathanasiou, E. Loukis, K. Papailiou

Laboratory of Thermal Turbomachines, National Technical University of Athens, Athens, Greece

J. Eng. Gas Turbines Power 113(2), 269-275 (Apr 01, 1991) (7 pages) doi:10.1115/1.2906558 History: Received January 17, 1990; Online April 24, 2008


The distortions of the pressure field around rotating blades of turbomachinery components due to alterations of their shape can be utilized for the identification of faults related to the blading. Measurement of the unsteady pressure field near the wall provides information on such flow and pressure distortions and can thus be used for diagnostic purposes. An experimental investigation of the compressor rotating blade pressure field of an industrial gas turbine has been undertaken, in order to demonstrate the feasibility of the abovementioned principle. Various realistic gas turbine blade faults have been examined. Application of the appropriate processing techniques demonstrates that unsteady pressure measurements can be used to identify the occurrence of minor blade faults (not traceable by standard techniques) as well as the kind of fault. The proposed methodology has the potential for being incorporated in a computerized engine health monitoring system.

Copyright © 1991 by The American Society of Mechanical Engineers
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