In the present paper, the influence of inlet flow incidence on the aerodynamic and thermal performance of a film cooled linear nozzle vane cascade is fully assessed. Tests have been carried out on a solid and a cooled cascade. In the cooled cascade, coolant is ejected at the end wall through a slot located upstream of the leading edge plane. Moreover, a vane showerhead cooling system is also realized through 4 rows of cylindrical holes. The cascade was tested at a high inlet turbulence intensity level (Tu1 = 9%) and at a constant inlet Mach number of 0.12 and nominal cooling condition, varying the inlet flow angle in the range ±20°. The aero-thermal characterization of vane platform was obtained through 5-hole probe and end wall adiabatic film cooling effectiveness measurements. Vane load distributions and surface flow visualizations supported the discussion of the results. A relevant negative impact of positive inlet flow incidence on the cooled cascade aerodynamic and thermal performance was detected. A negligible influence was instead observed at negative incidence, even at the lowest tested value of −20°.
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ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
June 11–15, 2018
Oslo, Norway
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5110-4
PROCEEDINGS PAPER
Incidence Effect on the Aero-Thermal Performance of a Film Cooled Nozzle Vane Cascade
G. Barigozzi,
G. Barigozzi
University of Bergamo, Dalmine, Italy
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A. Perdichizzi,
A. Perdichizzi
University of Bergamo, Dalmine, Italy
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M. Henze,
M. Henze
Ansaldo Energia Switzerland Ltd., Baden, Switzerland
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J. Krueckels
J. Krueckels
Ansaldo Energia Switzerland Ltd., Baden, Switzerland
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H. Abdeh
University of Bergamo, Dalmine, Italy
G. Barigozzi
University of Bergamo, Dalmine, Italy
A. Perdichizzi
University of Bergamo, Dalmine, Italy
M. Henze
Ansaldo Energia Switzerland Ltd., Baden, Switzerland
J. Krueckels
Ansaldo Energia Switzerland Ltd., Baden, Switzerland
Paper No:
GT2018-75037, V05CT19A001; 11 pages
Published Online:
August 30, 2018
Citation
Abdeh, H, Barigozzi, G, Perdichizzi, A, Henze, M, & Krueckels, J. "Incidence Effect on the Aero-Thermal Performance of a Film Cooled Nozzle Vane Cascade." Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. Volume 5C: Heat Transfer. Oslo, Norway. June 11–15, 2018. V05CT19A001. ASME. https://doi.org/10.1115/GT2018-75037
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