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Open AccessArticle

Flat Plate and Turbine Vane Film-Cooling Performance with Laid-Back Fan-Shaped Holes

DIEF Department of Industrial Engineering, University of Florence, Via S. Marta 3, 50139 Florence, Italy
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This paper is an extended version of our paper published in the Proceedings of 13th European Conference on Turbomachinery Fluid Dynamics & Thermodynamics, ETC13, Lausanne, Switzerland, 8–12 April 2019, Paper No. 314.
Int. J. Turbomach. Propuls. Power 2019, 4(2), 14; https://doi.org/10.3390/ijtpp4020014
Received: 3 May 2019 / Revised: 16 May 2019 / Accepted: 21 May 2019 / Published: 5 June 2019
Shaped holes are considered as an effective solution to enhance gas turbine film-cooling performance, as they allow to increase the coolant mass-flux, while limiting the detrimental lift-off phenomena. A great amount of work has been carried out in past years on basic flat plate configurations while a reduced number of experimental works deals with a quantitative assessment of the influence of curvature and vane pressure gradient. In the present work PSP (Pressure Sensitive Paint) technique is used to detail the adiabatic effectiveness generated by axial shaped holes with high value of Area Ratio close to 7, in three different configurations with the same 1:1 scale: first of all, a flat plate configuration is examined; after that, the film-cooled pressure and suction sides of a turbine vane model are investigated. Tests were performed varying the blowing ratio and imposing a density ratio of 2.5 . The experimental results are finally compared to the predictions of two different correlations, developed for flat plate configurations. View Full-Text
Keywords: film-cooling; shaped holes; turbine vane; flat plate; PSP film-cooling; shaped holes; turbine vane; flat plate; PSP
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Bacci, T.; Picchi, A.; Facchini, B. Flat Plate and Turbine Vane Film-Cooling Performance with Laid-Back Fan-Shaped Holes. Int. J. Turbomach. Propuls. Power 2019, 4, 14.

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