Fan-shaped holes are widely used to provide better cooling performances than cylindrical holes over a large range of different operating conditions. Main advantages of such solution include a reduced amount of cooling air for the same performance, increased part lifetime and fewer required holes. As the overall cooling performance of such holes is strictly related to the adiabatic effectiveness and heat transfer coefficient (HTC) increase due to the coolant injection, both issues should be investigated. A numerical analysis has been conducted on a laidback fan-shaped film cooling hole onto a flat plate with the aim of investigating the increase of heat transfer. A steady-state RANS analysis was performed at two different blowing ratios (1.25 and 2.5) with imposed heat flux on the heated wall reproducing the same conditions as in the experimental tests presented in the companion paper. Despite no temperature difference was imposed between main gas and coolant flow, adiabatic effectiveness maps were extracted from tracing distribution over the plate. Performances of four different eddy viscosity turbulence models have been tested: the Two-Layer model by Rodi both in the isotropic original formulation and with an anisotropic algebraic correction based on DNS data fitting as firstly proposed by Lakheal, the k–ω SST by Menter and the ν2–f by Durbin. All calculations were conducted with a 3D unstructured pressure-based compressible solver based on the open-source OpenFOAM® CFD platform. A detailed analysis of both the predicted flow field and thermal distribution in the domain was presented. The obtained results were compared with the experimental measurements showed in the companion paper both in terms of wall heat transfer coefficient and adiabatic effectiveness.
Skip Nav Destination
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
Heat Transfer Performance of Fan-Shaped Film Cooling Holes: Part II—Numerical Analysis
C. Bianchini,
C. Bianchini
Universita` degli Studi di Firenze, Firenze, Italy
Search for other works by this author on:
B. Facchini,
B. Facchini
Universita` degli Studi di Firenze, Firenze, Italy
Search for other works by this author on:
M. Maritano
M. Maritano
Ansaldo Energia S.P.A., Genova, Italy
Search for other works by this author on:
C. Bianchini
Universita` degli Studi di Firenze, Firenze, Italy
B. Facchini
Universita` degli Studi di Firenze, Firenze, Italy
L. Mangani
CFD Engineering, Firenze, Italy
M. Maritano
Ansaldo Energia S.P.A., Genova, Italy
Paper No:
GT2010-22809, pp. 1573-1583; 11 pages
Published Online:
December 22, 2010
Citation
Bianchini, C, Facchini, B, Mangani, L, & Maritano, M. "Heat Transfer Performance of Fan-Shaped Film Cooling Holes: Part II—Numerical Analysis." 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. 1573-1583. ASME. https://doi.org/10.1115/GT2010-22809
Download citation file:
21
Views
Related Proceedings Papers
Related Articles
Comparison of RANS and Detached Eddy Simulation Modeling Against Measurements of Leading Edge Film Cooling on a First-Stage Vane
J. Turbomach (May,2017)
Effects of a Reacting Cross-Stream on Turbine Film Cooling
J. Eng. Gas Turbines Power (May,2010)
A Detailed Study of the Interaction Between Two Rows of Cooling Holes
J. Turbomach (April,2018)
Related Chapters
Numerical Study on Dynamic Discharging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Numerical Study on Dynamic Charging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Natural Gas Transmission
Pipeline Design & Construction: A Practical Approach, Third Edition