A New Approach to the Calculation of S2 Stream Surfaces With Full Inverse and Hybrid Methods for Turbomachine PUBLIC ACCESS

[+] Author Affiliations
Ge Manchu, Yu Zhengti, Lou Yiping

Institute of Engineering Thermophysics, Academia Sinica, Beijing, China

Paper No. 88-GT-262, pp. V001T01A094; 8 pages
  • ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Amsterdam, The Netherlands, June 6–9, 1988
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7918-4
  • Copyright © 1988 by ASME


In this paper, a full Inverse problem method — a prescribed wall-velocity method (PWVM) — and a hybrid problem method are suggested in solving S2 stream surface. In these methods two walls or one wall coordinates of the meridional through flow section of turbomachine can be obtained when the velocities along the hub and casing walls or one of them are prescribed. The new form of the governing equations in terms of grid coordinates are obtained. These equations are different with those used for the S1 stream surfaces. The suitable wall-velocities can be selected and prescribed by designer and the coordinates of hub and casing walls will be obtained by solving these new equations on S2 stream surfaces. The boundary conditions and the solution of these equations will be presented too.

The programs have been written and several examples are calculated. The results seems to be satisfactory. A comparison between the solutions of this method and the ordinary method, which is a method given the coordinates of hub and casing walls, is also presented in this paper.

Copyright © 1988 by ASME
Topics: Turbomachinery
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