Sealing of components where there is no relative motion between the elements concerned remains a significant challenge in many gas turbine engine applications. Loss of sealing and cooling air from the internal air system through seals impacts on specific fuel consumption and can lead to undesirable flow interactions with resultant cost implications. For gas turbines, various strip seal types have been developed for use between Nozzle Guide Vanes in order to limit the flow of gas between the main stream annulus and the internal air system. Many different types of design have been proposed for overcoming strip seal problems such as misalignment of the grooves due to manufacturing and assembly constraints. In this paper various methods, with a particular focus on patents, for minimising the amount of leakage caused by such problems for strip seals between nozzle guide vanes are reviewed. By considering the advantages and disadvantages of each technique it is concluded that although apparently new strip seal designs for NGVs have improved performance, none of them can be considered to be ideal. This paper reviews the techniques and makes recommendations for future designs.
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ASME Turbo Expo 2006: Power for Land, Sea, and Air
May 8–11, 2006
Barcelona, Spain
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4238-X
PROCEEDINGS PAPER
Nozzle Guide Vane Static Strip Seals
Arash Farahani,
Arash Farahani
University of Sussex, Brighton, UK
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Peter Childs
Peter Childs
University of Sussex, Brighton, UK
Search for other works by this author on:
Arash Farahani
University of Sussex, Brighton, UK
Peter Childs
University of Sussex, Brighton, UK
Paper No:
GT2006-90185, pp. 1321-1331; 11 pages
Published Online:
September 19, 2008
Citation
Farahani, A, & Childs, P. "Nozzle Guide Vane Static Strip Seals." Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air. Volume 3: Heat Transfer, Parts A and B. Barcelona, Spain. May 8–11, 2006. pp. 1321-1331. ASME. https://doi.org/10.1115/GT2006-90185
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