The present study aims to investigate the interaction between a last-stage steam turbine blade row and diffuser. This work is carried out using CFD simulations of a generic last stage low pressure (LP) turbine and axial-radial exhaust diffuser attached to it. In order to determine the validity of the computational method, the CFD predictions are first compared with data obtained from an experimental test facility. A computational study is then performed for different design configurations of the diffuser and rotor casing shapes. The study focuses on typical flow features such as effects of rotor tip leakage flows and subsequent changes in the rotor-diffuser interactions. The results suggest that the rotor casing shape influences the rotor work extraction capability and yields significant improvements in the static pressure recovery.
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ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
June 15–19, 2015
Montreal, Quebec, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5664-2
PROCEEDINGS PAPER
The Effect of Rotor Casing on Low Pressure Steam Turbine and Diffuser Interactions Available to Purchase
Gursharanjit Singh,
Gursharanjit Singh
Queen Mary University of London, London, UK
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Andrew P. S. Wheeler
Andrew P. S. Wheeler
University of Southampton, Southampton, UK
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Gursharanjit Singh
Queen Mary University of London, London, UK
Gurnam Singh
Alstom Power, Rugby, UK
Andrew P. S. Wheeler
University of Southampton, Southampton, UK
Paper No:
GT2015-43030, V02BT40A006; 14 pages
Published Online:
August 12, 2015
Citation
Singh, G, Singh, G, & Wheeler, APS. "The Effect of Rotor Casing on Low Pressure Steam Turbine and Diffuser Interactions." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 2B: Turbomachinery. Montreal, Quebec, Canada. June 15–19, 2015. V02BT40A006. ASME. https://doi.org/10.1115/GT2015-43030
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