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A Numerical Investigation on the Influence of Lateral Boundaries in Linear Vibrating Cascades

[+] Author Affiliations
Roque Corral

Industria de TurboPropulsores S.A., Madrid, Spain

Fernando Gisbert

UPM – Universidad Politécnica de Madrid, Madrid, Spain

Paper No. GT2002-30451, pp. 1035-1046; 12 pages
doi:10.1115/GT2002-30451
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3609-6 | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

The effect of the finite extent of linear cascades on the unsteady pressure distribution of vibrating blades is assessed by means of a numerical study. The span of a reference cascade made up of flat plates has been changed to investigate its influence on the computed influence coefficients. It is concluded that the number of passages required to match a solution obtained with a traveling-wave mode strongly depends on the inter-blade phase angle under consideration and that existing linear vibrating cascade facilities have a marginal resolution to accurately match CFD analysis that assume that the blade is vibrating in a traveling-wave mode.

Copyright © 2002 by ASME

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