A numerical study of a state of the art leading edge cooling scheme was performed to analyze the heat transfer process within the leading edge cavity of a high pressure turbine airfoil. The investigated geometries account a trapezoidal supply channel with a large racetrack impingement holes. The coolant jets, confined among two consequent large fins, impact the leading edge internal surface and it is extracted from the leading edge cavity through both showerhead holes and film cooling holes. The CFD setup has been validated by means of the experimental measurements performed on a dedicated test rig developed and operated at University of Florence. The aim of this study is to investigate the combined effects of jet impingement, mass flow extraction and fins presence on the internal heat transfer of the leading edge cavity. More in details, the paper analyses the impact, in terms of blade metal temperature, of large fins presence and positioning. Jet’s Reynolds number is varied in order to cover the typical engine conditions of these cooling systems (Rej = 20000 – 40000).
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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
Numerical Analysis of Heat Transfer in a Leading Edge Geometry With Racetrack Holes and Film Cooling Extraction
Luca Andrei,
Luca Andrei
University of Florence, Firenze, Italy
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Antonio Andreini,
Antonio Andreini
University of Florence, Firenze, Italy
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Riccardo Da Soghe,
Riccardo Da Soghe
University of Florence, Firenze, Italy
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Bruno Facchini,
Bruno Facchini
University of Florence, Firenze, Italy
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Stefano Zecchi
Stefano Zecchi
AVIO S.p.A., Rivalta di Torino, TO, Italy
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Luca Andrei
University of Florence, Firenze, Italy
Antonio Andreini
University of Florence, Firenze, Italy
Riccardo Da Soghe
University of Florence, Firenze, Italy
Bruno Facchini
University of Florence, Firenze, Italy
Stefano Zecchi
AVIO S.p.A., Rivalta di Torino, TO, Italy
Paper No:
GT2013-94673, V03AT12A022; 11 pages
Published Online:
November 14, 2013
Citation
Andrei, L, Andreini, A, Da Soghe, R, Facchini, B, & Zecchi, S. "Numerical Analysis of Heat Transfer in a Leading Edge Geometry With Racetrack Holes and Film Cooling Extraction." Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 3A: Heat Transfer. San Antonio, Texas, USA. June 3–7, 2013. V03AT12A022. ASME. https://doi.org/10.1115/GT2013-94673
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