An Analysis of the Turbine Endwall Boundary Layer and Aerodynamic Losses PUBLIC ACCESS

[+] Author Affiliations
T. C. Booth

General Motors Corp., Indianapolis, IN

Paper No. 75-GT-23, pp. V01AT01A022; 14 pages
  • ASME 1975 International Gas Turbine Conference and Products Show
  • Volume 1A: General
  • Houston, Texas, USA, March 2–6, 1975
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7976-4
  • Copyright © 1975 by ASME


A momentum-integral analysis of the three-dimensional flow on the turbine endwall is presented. The formulation is for a compressible turbulent boundary layer with a constant streamwise shape factor. The effect of compressibility enters through a coordinate transformation and an assumed energy equation. An aerodynamic loss model is derived using inner and outer expansions. The losses decompose into frictional losses on the annulus and a vortex loss. Results are predicted for four cascade tests. In addition, previously observed trends of loss versus inlet boundary layer thickness, blade height, and blade chord are predicted. To illustrate a possible application, a parametric study is presented showing the effect on losses and heat transfer of various inlet boundary layer thickness distributions, which simulates different secondary flow configurations.

Copyright © 1975 by ASME
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