| Autor: |
Samy M. Morcos, Ahmed S Al-Adawy, Essam E. Khalil |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. |
| Popis: |
Film cooling is vital to gas turbine blades to protect them from high temperatures and hence high thermal stresses. Improvements have been made to the shaping of the cooling hole to provide higher heat transfer effectiveness. Forward-diffused (laidback) holes and laterally-diffused (fan-shaped) holes proved to give better effectiveness than cylindrical round ones. However, combining both effects achieves better lateral distribution and less penetration into the mainstream. As a preliminary study of the effect of varying lateral diffusion angle ( γ) and forward diffusion angle ( δ) on effectiveness distribution on an adiabatic flat plate, a numerical model is built with GAMBIT commercial preprocessor and flow field is solved with spatially-averaged film cooling effectiveness values in the streamwise direction using FLUENT commercial solver. Numerical results are verified and compared to corresponding experimental measurements. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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