A Computational Design Method for Transonic Turbomachinery Cascades PUBLIC ACCESS

[+] Author Affiliations
H. Sobieczky

DFVLR- Institut für Theoretische Strömungsmechanik, Göttingen, F.R. Germany

D. S. Dulikravich

NASA Lewis Research Center, Cleveland, OH

Paper No. 82-GT-117, pp. V001T01A045; 10 pages
  • ASME 1982 International Gas Turbine Conference and Exhibit
  • Volume 1: Turbomachinery
  • London, England, April 18–22, 1982
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7956-6
  • Copyright © 1982 by ASME


This paper describes a systematical computational procedure to find configuration changes necessary to modify the resulting flow past turbomachinery cascades, channels and nozzles, to be shock-free at prescribed transonic operating conditions. The method is based on a finite area transonic analysis technique and the fictitious gas approach. This design scheme has two major areas of application. First, it can be used for design of supercritical cascades, with applications mainly in compressor blade design. Second, it provides subsonic inlet shapes including sonic surfaces with suitable initial data for the design of supersonic (accelerated) exits, like nozzles and turbine cascade shapes. This fast, accurate and economical method with a proven potential for applications to three-dimensional flows is illustrated by some design examples.

Copyright © 1982 by ASME
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