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Unsteady Flow Investigations and Their Recent Challenges in Compressor Design

[+] Author Affiliations
Dieter Peitsch, Christian Poensgen, Bernhard Mück

Rolls-Royce Deutschland Ltd. & Company KG, Blankenfelde-Mahlow, Germany

Paper No. GT2005-68179, pp. 25-37; 13 pages
doi:10.1115/GT2005-68179
From:
  • ASME Turbo Expo 2005: Power for Land, Sea, and Air
  • Volume 6: Turbo Expo 2005, Parts A and B
  • Reno, Nevada, USA, June 6–9, 2005
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4730-6 | eISBN: 0-7918-3754-8
  • Copyright © 2005 by ASME

abstract

This paper describes the relevance of unsteady flow investigations in turbomachinery and how they are included into the design process for compressors of modern aero engines. Significant work has been performed in leadership of Professor Gallus at the Institute for Jet Propulsion and Turbomachinery (IST) at the RWTH Aachen, University of Technology, Germany, in this area of interest. Selected topics of this numerical and experimental work will be shown. This academic work has of course to be made useful for application in the design process of turbomachinery, so the connection to today’s challenges is shown as well. In recent years, blisks have become a more attractive choice for design and manufacture of compressor rotors. In contrast to the earlier years, where blade flutter has enjoyed the main focus of interest, the blisk technology requires different approaches in terms of the assessment of the interaction between structure and fluid. The implementation of the flutter and forced response investigations into the design process for blisks is thus a major issue to be solved. The paper will describe, how the relevant unsteady flow phenomena are assessed. Results will be shown for a recent engine development, the high pressure compressor for the new TP400 engine for the Airbus A400M military transport aircraft. This compressor is currently designed at Rolls-Royce Deutschland (RRD).

Copyright © 2005 by ASME

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