0
RESEARCH PAPERS

Analysis and Solution of a Nonsynchronous Vibration Problem in the Last Row Turbine Blade of a Large Industrial Combustion Turbine

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

Engine Design & Development, Westinghouse Electric Corporation, Combustion Turbine Engineering Department, Concordville, PA 19331

J. M. Allen

Stress & Dynamics, Westinghouse Electric Corporation, Combustion Turbine Engineering Department, Concordville, PA 19331

R. J. Antos

Engineering Field Support, Westinghouse Electric Corporation, Combustion Turbine Engineering Department, Concordville, PA 19331

J. Eng. Gas Turbines Power 108(4), 591-598 (Oct 01, 1986) (8 pages) doi:10.1115/1.3239952 History: Received February 14, 1986; Online October 15, 2009

Abstract

This paper presents the analysis and corrective action taken to solve a flow-induced nonsynchronous vibration failure problem encountered in the last-stage rotating blade in a large industrial combustion turbine. A description of the fatigue failures and of temporary operation restrictions that precluded further failure is given. The results from a strain gage telemetry test are presented which show that failure was due to high vibratory stress excursions from fundamental mode vibration, which resulted from broad band buffeting excitations and very low aerodynamic damping at high levels of power and mass flow. From these data, design criteria were developed for designing a retrofittable blade that removed the operating restrictions. Telemetry test results (from the same turbine), which verified the new design, are also briefly presented and discussed. This investigation shows that the design of future high-performance exhaust end combustion turbine blading must take into account nonsynchronous excitation (buffeting) and the aeroelastic interaction between blade structure and flow, in addition to the synchronous excitations traditionally allowed for in the design process.

Copyright © 1986 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