Analysis of an Axial Compressor Blade Vibration Based on Wave Reflection Theory

[+] Author and Article Information
J. A. Owczarek

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pa. 18015

J. Eng. Gas Turbines Power 106(1), 57-64 (Jan 01, 1984) (8 pages) doi:10.1115/1.3239551 History: Received December 27, 1982; Online October 15, 2009


The paper describes application of the theory of wave reflection in turbomachines to rotor blade vibrations measured in an axial compressor stage. The blade vibrations analyzed could not be explained using various flutter prediction techniques. The wave reflection theory, first advanced in 1966, is expanded, and more general equations for the rotor blade excitation frequencies are derived. The results of the analysis indicate that all examined rotor blade vibrations can be explained by forced excitations caused by reflecting waves (pressure pulses). Wave reflections between the rotor blades and both the upstream and downstream stator vanes had to be considered.

Copyright © 1984 by ASME
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