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Flow and Heat Transfer at the Hub Endwall of Inlet Vane Passages — Experiments and Simulations

[+] Author Affiliations
R. P. Roy, K. D. Squires, M. Gerendas, S. Song

Arizona State University, Tempe, AZ

W. J. Howe, A. Ansari

AlliedSignal Engines, Phoenix, AZ

Paper No. 2000-GT-0198, pp. V003T01A006; 16 pages
doi:10.1115/2000-GT-0198
From:
  • ASME Turbo Expo 2000: Power for Land, Sea, and Air
  • Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Munich, Germany, May 8–11, 2000
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7856-9
  • Copyright © 2000 by ASME

abstract

The heat transfer distribution on the hub endwall of a model turbine vane passage was studied experimentally and by numerical simulation. The experiments were carried out in a low speed wind tunnel featuring a linear cascade of scaled-up inlet vanes. Measurements were made both without and with secondary air injection through slots located upstream of the vane leading edge using the transient liquid crystal technique. Results are presented for ReCax, in = 6.76 × 104 and blowing ratios of zero (no secondary air injection) and 1.3. Simulations were performed on unstructured grids using Fluent. A near-wall description of the flow field was employed. Turbulent stresses in the momentum equations were closed using the Spalart-Almaras model, and the turbulent heat flux in the thermal energy equation was closed using a constant turbulent Prandtl number. The agreement between the measurements and the simulations is generally good.

Copyright © 2000 by ASME

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