0

Full Content is available to subscribers

Subscribe/Learn More  >

High Temperature Turbine First Stage Vane Wake to Stator Heat Shield Interaction on Outer Casing

[+] Author Affiliations
Magali Cochet, Tanguy Arzel, Michael Gritsch, Bruno Stephan, Martin Schnieder

Alstom Power, Baden, Switzerland

Paper No. GT2010-22956, pp. 395-404; 10 pages
doi:10.1115/GT2010-22956
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 4: Heat Transfer, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4399-4 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by Alstom Technology, Ltd.

abstract

Emission reduction and efficiency increase are key targets for gas turbine design. One way to reduce emissions is to get a lower peak temperature, e.g. to replace a parabolic inlet temperature profile protecting edge areas (platforms, heatshields) by a flat temperature profile. Another possibility is to design compact turbines with smaller spacing between blade rows to reduce hot gas wetted areas. Both solutions result in higher thermal load on endwalls. At part interfaces, gaps need to be purged to prevent hot gas ingestion. Cooling air consumption leads to lower efficiencies. A better understanding of the thermal load on endwalls will offer cooling air reduction potential. This paper focuses on the purging gap between first stage vane and the downstream outer diameter heatshield. The requirements for the gap purge air depend on the vane wake. A generic, realistic geometry including the interfacial gap is studied. Computational fluid dynamic is used to understand the flow structure, the film cooling effectiveness and heat transfer coefficient. Film-cooling effectiveness are measured on a cascade bench by a steady-state thermochromic liquid crystal technique. Results are compared to CFD. A parametric study on the influence of blowing ratio is included.

Copyright © 2010 by Alstom Technology, Ltd.

Figures

Tables

Interactive Graphics

Video

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

NOTE:
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