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Development of New High Load/High Lift Transonic Shrouded HP Gas Turbine Stage Design: A New Approach for Turbomachinery

[+] Author Affiliations
Brian Haller

Alstom Power, Lincoln, UK

James Anderson

QinetiQ, Ltd., Farnborough, Hampshire, UK

Paper No. GT2002-30363, pp. 363-370; 8 pages
doi:10.1115/GT2002-30363
From:
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 5: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3610-X | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME

abstract

This paper details some of the recent developments that ALSTOM has made, in collaboration with QinetiQ, to develop and test highly loaded high pressure turbine stage designs. A new approach was used for the preliminary design of the stage (adapted from the Denton U3 method) and this is described. For the first time the standard empirical loss correlations were abandoned. The targets for the stage are very aggressive. The stage incorporates many innovative features to address aerodynamic and other parasitic losses, including “Controlled Flow” technology to address secondary flow losses. This new approach is then validated against detailed steady performance measurements. Additional unsteady traverse measurements taken have been used to validate the predicted rotor flow field. These unsteady traverse measurements have also been used to resolve the unsteady flow field. Although detailed interpretation of these results has not yet been completed, some understanding is drawn from these results.

Copyright © 2002 by ASME

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