Gas turbine cooling has steadily acquired major importance whenever engine performances have to be improved. Among various cooling techniques, film cooling is probably one of the most diffused systems for protecting metal surfaces against hot gases in turbine stages and combustor liners. Most recent developments in hole manufacturing allow to perform a wide array of micro-holes, currently referred to as effusion cooling. This paper presents the validation of a simplified 2D conjugate approach through comparison with the experimental results of effectiveness for an effusion plate, performed during the first year of the European Specific Targeted REsearch Project AITEB-2 (Aerothermal Investigation of Turbine Endwalls and Blades). A preliminary test is performed with the steady-state technique, using TLC (Thermochromic Liquid Crystal) wide-band formulations. Results are obtained in terms of local distributions of adiabatic effectiveness. Average values are compared with calculations to validate the numerical code. Then, Design Of Experiment (DOE) approach is used to perform several conjugate tests (about 180), so as to derive the behavior of different effusion plates in terms of overall effectiveness and mass flow rate. Data are analyzed in detail and a correlative approach for the overall effectiveness is proposed.
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ASME Turbo Expo 2006: Power for Land, Sea, and Air
May 8–11, 2006
Barcelona, Spain
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4238-X
PROCEEDINGS PAPER
Correlative Analysis of Effusion Cooling Systems
Lorenzo Arcangeli,
Lorenzo Arcangeli
Universita` degli Studi di Firenze, Firenze, Italy
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Marco Surace,
Marco Surace
Universita` degli Studi di Firenze, Firenze, Italy
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Lorenzo Tarchi,
Lorenzo Tarchi
Universita` degli Studi di Firenze, Firenze, Italy
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Daniele Coutandin,
Daniele Coutandin
Avio S.p.A., Torino, Italy
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Stefano Zecchi
Stefano Zecchi
Avio S.p.A., Torino, Italy
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Lorenzo Arcangeli
Universita` degli Studi di Firenze, Firenze, Italy
Marco Surace
Universita` degli Studi di Firenze, Firenze, Italy
Lorenzo Tarchi
Universita` degli Studi di Firenze, Firenze, Italy
Daniele Coutandin
Avio S.p.A., Torino, Italy
Stefano Zecchi
Avio S.p.A., Torino, Italy
Paper No:
GT2006-90405, pp. 459-468; 10 pages
Published Online:
September 19, 2008
Citation
Arcangeli, L, Surace, M, Tarchi, L, Coutandin, D, & Zecchi, S. "Correlative Analysis of Effusion Cooling Systems." Proceedings of the ASME Turbo Expo 2006: Power for Land, Sea, and Air. Volume 3: Heat Transfer, Parts A and B. Barcelona, Spain. May 8–11, 2006. pp. 459-468. ASME. https://doi.org/10.1115/GT2006-90405
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