This paper describes the design and optimization of an ‘air-curtain’ type seal using a fluidic jet to reduce tip leakage losses on a small high-speed single stage axial turbine device. The application will essentially demonstrate proof of concept for turbomachinery applications, opening the door for the development of future designs for applications in all scales of turbomachine. CFD is used to develop and optimize the seal design. The performance benefit from applying the new seal is predicted. These calculations illustrate the importance of accurately accounting for the effects of the sealing jet on shroud shear forces, in addition to leakage flow reduction, when determining the overall gain in turbine output power from the improved sealing. It is planned to validate the new seal design in full-scale turbine tests, during the next phase of the work.
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ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
June 3–7, 2013
San Antonio, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5514-0
PROCEEDINGS PAPER
Application of an Air-Curtain Fluidic Jet Type Seal to Reduce Turbine Shroud Leakage
Michael Hilfer,
Michael Hilfer
Durham University, Durham, UK
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Andrew Messenger
Andrew Messenger
Durham University, Durham, UK
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Alison Auld
Durham University, Durham, UK
Michael Hilfer
Durham University, Durham, UK
Simon Hogg
Durham University, Durham, UK
Grant Ingram
Durham University, Durham, UK
Andrew Messenger
Durham University, Durham, UK
Paper No:
GT2013-94198, V03AT15A005; 8 pages
Published Online:
November 14, 2013
Citation
Auld, A, Hilfer, M, Hogg, S, Ingram, G, & Messenger, A. "Application of an Air-Curtain Fluidic Jet Type Seal to Reduce Turbine Shroud Leakage." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 3A: Heat Transfer. San Antonio, Texas, USA. June 3–7, 2013. V03AT15A005. ASME. https://doi.org/10.1115/GT2013-94198
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