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A Novel Method for Improvement of Aerodynamic Performance of Highly Loaded LP Turbine Airfoils for Aeroengines

[+] Author Affiliations
K. Funazaki, K. Okamura, Y. Ebina, Y. Sato, T. Kosugi

Iwate University, Morioka, Japan

A. Takahashi, A. Mamada

IHI Co., Tokyo, Japan

Paper No. GT2013-94745, pp. V06AT36A019; 12 pages
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 6A: Turbomachinery
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5522-5
  • Copyright © 2013 by ASME


This paper proposes a novel method to improve aerodynamic performance of highly loaded Low-Pressure (LP) turbine airfoils for aeroengines over a relatively wide range of Reynolds number. This new method employs two types of approaches; one is the equipment of two-dimensional contouring with small step on the suction surface of the airfoil and the other approach is a re-shaping of the airfoil near the trailing edge. A linear cascade test facility is employed to investigate the aerodynamic performance of the newly proposed airfoils by use of a miniature Pitot probe. Suction surface boundary layers as well as airfoil wakes are also measured using a hot wire probe. In the experiment, various flow conditions, Reynolds number, wake-passing Strouhal number, are examined. Numerical simulations are carried out to have a better understanding of the flow field around the airfoil. URANS and LES are employed for this purpose. It is found that the proposed method has a capability to reduce the profile loss to some extent.

Copyright © 2013 by ASME
Topics: Turbines , Airfoils



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