Coupled Three-Dimensional Aeroelastic Stability Analysis of Bladed Disks

[+] Author and Article Information
G. A. Gerolymos

Université Pierre & Marie Curie, Paris, France

J. Turbomach 115(4), 791-799 (Oct 01, 1993) (9 pages) doi:10.1115/1.2929317 History: Received February 17, 1992; Online June 09, 2008


In the present work an algorithm for the coupled aeromechanical computation of three-dimensional compressor cascades vibrating in a traveling-wave mode is presented and applied to the determination of aeroelastic stability of a transonic fan rotor. The initial vibratory modes are computed using a finite-element structural analysis code. The unsteady flow field response to blade vibration is estimated by numerical integration of the three-dimensional unsteady Euler equations. Coupling relations are formulated in the frequency domain, using a mode-modification technique, based on modal projection. The vibratory mode is updated at the end of the aerodynamic simulation of each period, and the updated mode is used for the simulation of the next period. A number of results illustrate the method’s potential.

Copyright © 1993 by The American Society of Mechanical Engineers
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