Nozzle guide vane static strip seals

Farahani, Arash and Childs, Peter (2006) Nozzle guide vane static strip seals. In: ASME Turbo Expo 2006: Power for Land, Sea, and Air, 8-11th May, 2006, Barcelona, Spain.

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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.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Paper no. GT2006-90185
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Peter Robin Nicholas Childs
Date Deposited: 06 Feb 2012 20:04
Last Modified: 11 Jul 2012 07:52
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