This paper presents an experimental and numerical investigation of the aero-thermal performance of an uncooled winglet tip, under transonic conditions. Spatially-resolved heat transfer data, including winglet tip surface and near tip side walls, are obtained using the transient infrared thermography technique within the Oxford High Speed Linear Cascade test facility. CFD predictions are also conducted using the Rolls-Royce HYDRA suite. Most of the spatial heat transfer variations on the tip surface are well-captured by the CFD solver. The transonic flow pattern and its influence on heat transfer are analyzed, which shows that the turbine blade tip heat transfer is greatly influenced by the shock wave structure inside the tip gap. The effect of the casing relative motion is also numerically investigated. The CFD results indicate that the local heat transfer distribution on the tip is affected by the relative casing motion, but the tip flow choking and shock wave structure within the tip gap still exist in the aft region of the blade.
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ASME Turbo Expo 2010: Power for Land, Sea, and Air
June 14–18, 2010
Glasgow, UK
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4399-4
PROCEEDINGS PAPER
Aero-Thermal Performance of a Winglet at Engine Representative Mach and Reynolds Numbers
D. O. O’Dowd,
D. O. O’Dowd
University of Oxford, Oxford, UK
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M. L. G. Oldfield,
M. L. G. Oldfield
University of Oxford, Oxford, UK
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P. M. Ligrani,
P. M. Ligrani
University of Oxford, Oxford, UK
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B. C. Y. Cheong,
B. C. Y. Cheong
Rolls-Royce plc, Bristol, UK
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I. Tibbott
I. Tibbott
Rolls-Royce plc, Derby, UK
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D. O. O’Dowd
University of Oxford, Oxford, UK
Q. Zhang
University of Oxford, Oxford, UK
L. He
University of Oxford, Oxford, UK
M. L. G. Oldfield
University of Oxford, Oxford, UK
P. M. Ligrani
University of Oxford, Oxford, UK
B. C. Y. Cheong
Rolls-Royce plc, Bristol, UK
I. Tibbott
Rolls-Royce plc, Derby, UK
Paper No:
GT2010-22794, pp. 357-367; 11 pages
Published Online:
December 22, 2010
Citation
O’Dowd, DO, Zhang, Q, He, L, Oldfield, MLG, Ligrani, PM, Cheong, BCY, & Tibbott, I. "Aero-Thermal Performance of a Winglet at Engine Representative Mach and Reynolds Numbers." Proceedings of the ASME Turbo Expo 2010: Power for Land, Sea, and Air. Volume 4: Heat Transfer, Parts A and B. Glasgow, UK. June 14–18, 2010. pp. 357-367. ASME. https://doi.org/10.1115/GT2010-22794
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