0
RESEARCH PAPERS

Effects of Structural Coupling on Mistuned Cascade Flutter and Response

[+] Author and Article Information
R. E. Kielb

Structure Branch, National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 43135

K. R. V. Kaza

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, Ohio 44135

J. Eng. Gas Turbines Power 106(1), 17-24 (Jan 01, 1984) (8 pages) doi:10.1115/1.3239532 History: Received December 27, 1982; Online October 15, 2009

Abstract

The effects of structural coupling on mistuned cascade flutter and response are analytically investigated using an extended typical section model. Previous work using two degree of freedom per blade typical section models has included only aerodynamic coupling. The present work extends this model to include both structural and aerodynamic coupling between the blades. The model assumes that the structurally coupled system natural modes have been determined and can be represented in the form of N bending and N torsional uncoupled modes for each blade, where N is the number of blades and, hence, is only valid for blade dominated motion. The aerodynamic loads are calculated by using two-dimensional unsteady cascade theories in the subsonic and supersonic flow regimes. The results show that the addition of structural coupling can affect both the aeroelastic stability and frequency. The stability is significantly affected only when the system is mistuned. The resonant frequencies can be significantly changed by structural coupling in both tuned and mistuned systems, however, the peak response is significantly affected only in the latter.

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

References

Figures

Tables

Errata

Discussions

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