Cascade Flutter Analysis of Cantilevered Blades

[+] Author and Article Information
A. V. Srinivasan

Applied Mechanics Research, United Technologies Research Center, East Hartford, Conn. 06108

J. A. Fabunmi

University of Maryland, College Park, Md. 20742

J. Eng. Gas Turbines Power 106(1), 34-43 (Jan 01, 1984) (10 pages) doi:10.1115/1.3239548 History: Received December 27, 1982; Online October 15, 2009


An analysis has been developed to treat the aeroelastic behavior of a cascade of cantilevered blades. The unique features of the formulation include consideration of (a) coupling between bending and torsion in each of the blade modes, (b) coupling among blade modes, (c) spanwise variation of blade mode shapes, (d) mechanical damping in each mode, (e) aerodynamic coupling among all blades of the assembly, and (f) mistuning. The methodology leads to a complex eigenvalue problem of the form [A (λ)] {x} = λ {x} the solution of which establishes the nature of stability and determines the flutter modes of vibration. A parametric study is made to examine the influence on flutter of (a) the strength of coupling between bending and torsion, (b) proximity of modal frequencies, (c) mass ratio, and (d) mistuning. Numerical results presented here are restricted to a twelve bladed system coupled aerodynamically. The flow conditions are assumed to be subsonic but the formulation of the problem and the organization of the computer program are such that other conditions can easily be considered in computation. The extension of the analysis to include mechanical coupling between the blades (through either shrouds or disk) is shown to be straightforward.

Copyright © 1984 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In