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Numerical Simulation of the 3D Viscous Flow in the Exhaust Casing of a Low-Pressure Steam Turbine

[+] Author Affiliations
X. Xu, S. Kang

Chinese Academy of Sciences, Beijing, China

Ch. Hirsch

Vrije University Brussels, Brussels, Belgium

Paper No. 2001-GT-0487, pp. V001T03A071; 8 pages
  • ASME Turbo Expo 2001: Power for Land, Sea, and Air
  • Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery
  • New Orleans, Louisiana, USA, June 4–7, 2001
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7850-7
  • Copyright © 2001 by ASME


Numerical results of the 3D viscous flow in a downward exhaust casing of a low-pressure steam turbine, obtained with the 3D Navier-Stokes solver Fine/TURBO, is presented. Comprehensive comparisons of the computational results with the available experimental data, such as velocity, static and total pressure coefficients, are given. A good agreement with the experimental data is obtained. The computational results reveal a complex vortex system, including a passage vortex, a secondary vortex, an endwall vortex and a separation vortex, within the casing model. It is found that of all the vortices, most portion of energy losses within the casing is contributed from the passage vortex.

Copyright © 2001 by ASME



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