Full Content is available to subscribers

Subscribe/Learn More  >

Simulation of Blade Casing Interaction Phenomena in Gas Turbines Resulting From Heavy Tip Rubs Using an Implicit Time Marching Method

[+] Author Affiliations
Robin J. Williams

Rolls-Royce plc, Derby, UK

Paper No. GT2011-45495, pp. 1007-1016; 10 pages
  • ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
  • Volume 6: Structures and Dynamics, Parts A and B
  • Vancouver, British Columbia, Canada, June 6–10, 2011
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5466-2
  • Copyright © 2011 by Rolls-Royce plc


Severe rubs between gas turbine blades and engine casings can in extreme cases result in damaging blade vibration levels and rapid loss of casing lining material. Even for more minor rubs, the wear in the lining material will result in increase tip gaps and a consequent loss in efficiency. Major rub events are extremely rare in practice, and there is seldom any useful diagnostic evidence of the root cause of the behaviour. Moreover, traditional analysis methods are not suitable for exploring the wide range of potential conditions under which an unstable vibration response might be initiated. A new modelling technique has been developed for modelling blade casing rubs which includes a detailed model of the interaction with liner wear. The method is time based, but is very efficient, enabling a wide range of initiating conditions to be explored. A series of examples have been developed to firstly: demonstrate the method is robust and reliable, and secondly: to investigate potential interaction phenomena under representative simulated conditions. The method has been applied to a real blade example, for which severe wear is known to have occurred. The method predicts that instability may occur above a threshold level of tip rub severity, and also demonstrates the improvement in an alternative blade design for which rub tolerance is known to be superior.

Copyright © 2011 by Rolls-Royce plc



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

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 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