Design approach for maximising contacting filament seal performance retention
Article
Article Title | Design approach for maximising contacting filament seal performance retention |
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ERA Journal ID | 3711 |
Article Category | Article |
Authors | Jahn, Ingo HJ |
Journal Title | Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science |
Journal Citation | 229 (5), pp. 926-942 |
Number of Pages | 17 |
Year | 2015 |
Publisher | SAGE Publications Ltd |
Place of Publication | United Kingdom |
ISSN | 0954-4062 |
2041-2983 | |
Digital Object Identifier (DOI) | https://doi.org/10.1177/0954406214541433 |
Web Address (URL) | https://journals.sagepub.com/doi/abs/10.1177/0954406214541433 |
Abstract | Good sealing is a key requirement for modern efficient turbomachinery such as steam and gas turbines. A class of seals that promise better performance, compared to conventional labyrinth seals, are contacting filament seals such as brush, leaf, or finger seal. When new, these filament seals offer better performance; however, if poorly designed they wear excessively, resulting in leakages higher than a comparable labyrinth seal. This paper outlines a design methodology for selecting ideal contacting filament seal properties for a given operating cycle or set of operating cycles. Following this approach ensures the seal performs well, the seal retains its performance, and performance is retained if the operating cycle is altered. In the approach, the seals are described by four generic properties (stiffness, blow-down, cross-coupling, and build clearance), which are then used for a performance evaluation based on a number of test cycles. Once the ideal seal properties for a given operating cycle have been identified, a seal to match these can be designed. The approach is evaluated with a generic gas turbine cycle and recommendations for ideal contacting filament seal properties for this cycle are made. |
Keywords | Seals; brush sea; leaf seal; filament seal; computational design; seal performance; gas turbines |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 4001. Aerospace engineering |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
https://research.usq.edu.au/item/z213q/design-approach-for-maximising-contacting-filament-seal-performance-retention
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