Application of a Three-Dimensional Inverse Method to the Design of a Centrifugal Compressor Impeller PUBLIC ACCESS

[+] Author Affiliations
Alain Demeulenaere

Numeca International, Brussels, Belgium

Olivier Léonard

Université de Liège, Liège, Belgium

René Van den Braembussche

von Karman Institute, Rhode-Saint-Genese, Belgium

Paper No. 98-GT-127, pp. V001T01A039; 8 pages
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 1: Turbomachinery
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7862-0
  • Copyright © 1998 by ASME


The use of a three-dimensional Euler inverse method for the design of a centrifugal impeller is demonstrated.

Both the blade shape and the endwalls are iteratively designed. The meridional contour is modified in order to control the mean velocity level in the blade channel, while the blade shape is designed to achieve a prescribed loading distribution between the inlet and the outlet.

The method salves the time dependent Euler equations in a numerical domain of which some boundaries (the blades or the endwalls) move and change shape during the transient part of the computation, until a prescribed pressure distribution is achieved on the blade surfaces.

The method is applied to the design of a centrifugal compressor impeller, whose hub endwall and blade surfaces are modified by the inviscid inverse method. The real performance of both initial and modified geometries are compared through three-dimensional Navier-Stokes computations.

Copyright © 1998 by ASME
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