Effective Tools for Diagnosing Elusive Turbomachinery Dynamics Problems in the Field

[+] Author and Article Information
H. R. Simmons, A. J. Smalley

Southwest Research Institute, San Antonio, TX 78284

J. Eng. Gas Turbines Power 112(4), 470-477 (Oct 01, 1990) (8 pages) doi:10.1115/1.2906191 History: Received January 13, 1989; Online April 24, 2008


This paper describes and discusses techniques that can effectively diagnose dynamics problems in turbomachinery. A variety of elusive dynamics problems are identified that require definition, quantification, diagnosis, and monitoring. The state of the art in measurement and signal processing techniques is discussed with reference to such factors as the directness of the measurement, the degree of intrusion required, the difficulty of installation, and the reliability or durability of the sensor. Several examples of techniques are provided that have proved to be effective in diagnosing elusive dynamics problems; some examples allow comparison of alternative techniques with different degrees of effectiveness. Problems addressed include rotating stall in the compressor section of a gas turbine, coupled lateral/torsional vibration in a gas turbine driven pipeline compressor, forced vibration of combustor parts, strain gage telemetry of blade vibrations, and nonintrusive measurement of blade vibrations using bearing-mounted accelerometers.

Copyright © 1990 by The American Society of Mechanical Engineers
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