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Euler Inverse Axisymmetric Solution for Design of Axial Flow Multistage Turbomachinery

[+] Author Affiliations
Simone Rosa Taddei, Francesco Larocca

Politecnico di Torino, Torino, Italy

Francesco Bertini

Avio Group, Rivalta, Italy

Paper No. GT2010-22795, pp. 821-830; 10 pages
doi:10.1115/GT2010-22795
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4402-1 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

An axisymmetric model is used that replaces the blades with hub-to-tip streamsurfaces and their main effects on the flow with blade force terms. Euler equations are solved by means of an upwind finite-volume scheme for a specified swirl distribution in the meridional blade regions. This quantity drives the spanwise distribution of specific work for rotors and the swirl adding/removing property for stators. The time-marching procedure includes an evolutionary equation for the hub-to-tip geometry in each blade region. This equation involves use of a specified leading edge as a blade stacking line. Throughout the computation, the streamsurfaces take that shape providing the desired swirl distribution. The method is suitable to highly loaded blades i.e. turbine design. Compared to a traditional through-flow method, it predicts the overall turbine performances with about a 1% error. A satisfactory agreement is found concerning the spanwise distribution of the core flow quantities as well.

Copyright © 2010 by ASME

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