Full Content is available to subscribers

Subscribe/Learn More  >

Investigation of Aerodynamic Losses and Film Cooling Effectiveness for a NGV Profile

[+] Author Affiliations
Bruno Stephan, Jörg Krückels, Michael Gritsch

Alstom Power, Baden, Switzerland

Paper No. GT2010-22810, pp. 1391-1400; 10 pages
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4402-1 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by Alstom Technology, Ltd.


Efficiency increase is one of the design targets of a gas turbine. In the highly cooled front stages the air injection out of film cooling holes and the mixing with the hot gases contributes to aerodynamic profile losses. Design parameters for film cooling rows, which the losses influence, are amongst others the blowing rate, the momentum ratio, the shape of the fan and the angle between cooling hole axis and airfoil surface. The film cooling effectiveness is depending on these parameters as well as from the choice of the locations of the film rows. Two series of tests were carried out for a nozzle guide vane at two different linear test facilities. One test series investigated the aerodynamic loss behaviour of the profile under two different cooling schemes, where the locations of cooling air injection on the airfoil suction side varied. Results show a significantly lower aerodynamic loss for the configuration with injection in the front region of the airfoil. In the second test series the film cooling effectiveness of a selected cooling row in the front region on suction side of the airfoil was measured. The analysis of the measurements show that the film is attached to the airfoil over the whole length up to the trailing edge and proved its operability under different flow regimes.

Copyright © 2010 by Alstom Technology, Ltd.
Topics: Cooling



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In