Some Aerodynamic Aspects of Engine Secondary Air Systems PUBLIC ACCESS

[+] Author Affiliations
H. Zimmermann

MTU Motoren- und Turbinen-Union München GmbH, Federal Republic of Germany

Paper No. 89-GT-209, pp. V001T01A084; 8 pages
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME


Internal cooling air systems of turbomachines contain various fluid flow components, i.e. rotating holes, tapping configurations, coverplates, labyrinth seals etc., for which only the basic aerodynamics are known. Numerical calculations for these elements are carried out and compared with test results showing fair agreement in general.

For most of the components of internal air systems there is a serious lack of test data. It is shown that the situation can be relieved by applying numerical methods, which should also be used to improve and extend the empirical correlations in the air systems computer programs.

Copyright © 1989 by ASME
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