Investigation of Film Cooling Effectiveness Enhancement by Using Corrugated Spiral Holes
(*) Corresponding author
DOI: https://doi.org/10.15866/ireme.v9i4.5955
Abstract
Film cooling represents one of the important game-changing technologies that has allowed the achievement of today’s high inlet turbine temperature to get high-efficiency gas turbine engines. Shear Stress Transport (SST) K-ω was performed to investigate the flow structures and the development process of vortices in different sections (rectangular, hexagonal and circular) of a stationary gas turbine at blowing ratio equal to (0.5, 1.0, 1.5 and 2.0), while the jet film cooling hole angles equal to (90°, 60°, 45° and 30°). It was observed that higher freestream turbulence improves adiabatic effectiveness and heat transfer coefficient for the corrugation film cooling holes design and specially enhancement at holes angle equal to 30° with twisted angle equal to 360° and rectangular corrugation shape. Results show the effectiveness enhancement range of 20.1%-69.3%of the smooth film cooling hole. Numerical calculation of film cooling effectiveness is validated with reported numerical and experimental results.
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Reinaldo A. and Reinhard N., Film Cooling on Highly Loaded Blades With Main Flow Separation—Part II: Overall Film Cooling Effectiveness, Journal of Turbomachinery, Vol. 135, pp. 011044-1, 2013.
http://dx.doi.org/10.1115/1.4006569
Walters, D. K., and Leylek, J. H.,A Detailed Analysis of Film-Cooling Physics Part I: Streamwise Injection with Cylindrical Holes,ASME J. Turbomach, Vol. 122, pp. 102–112, 2000.
http://dx.doi.org/10.1115/1.555433
Leylek, J. H., and Zerkle, R. D., Discrete-Jet Film Cooling: A Comparison of Computational Results with Experiments,ASME J. Turbomach., Vol.116, pp. 358–368, 1994.
http://dx.doi.org/10.1115/1.2929422
Bergeles, G., Gosman, A. D., and Launder, A. D., The Prediction of Three-dimensional Discrete-hole Cooling Processes,J. Heat Transfer, Vol. 98, pp. 379–386, 1976.
http://dx.doi.org/10.1115/1.3450564
Hall, J. E., Topp, D. A., and Delaney, R. A., Aerodymamic/Heat Transfer Analysis of Discrete Site Film-cooled Turbine Airfoils,AIAA Paper No. 94–3070, 1994.
http://dx.doi.org/10.2514/6.1994-3070
Bohn, D., and Kusterer, K., Blowing Ratio Influence on Jet Mixing Flow Phenomena at the Leading Edge,AIAA Paper No. 99–0670, 1999.
http://dx.doi.org/10.2514/6.1999-670
Lee, S. W., Kim, Y. B., and Lee, J. S., Flow Characteristics and Aerodynamic Losses of Film-cooling Jets with Compound Angle Orientations, ASME Paper No. 95-GT-38, 1995.
http://dx.doi.org/10.1115/95-gt-038
Bunker, R. S., A Review of Shaped Hole Turbine FilmCooling Technology,J. Heat Transfer, Vol. 127, n. 4, pp. 441-453, 2005.
http://dx.doi.org/10.1115/1.1860562
Dhungel, S., Phillips, A., Ekkad, S.V., and Heidmann, J.D., Experimental Investigation of a Novel Anti-Vortex Film Cooling Hole Design,ASME Paper GT2007–27419, 2007.
Haven, B.A., Yamagata, D.K., Kurosaka, M., Yamawaki, S., and Maya, T., Anti-Kidney Pair of Vortices in Shaped Holes and Their Influence on Film Cooling Effectiveness. ASME Paper 97– GT–45, 1997.
http://dx.doi.org/10.1115/97-gt-045
Lemmon, C.A., Kohli, A., and Thole, K.A., Formation of Counter-Rotating Vortices in Film-Cooling Flows,ASME Paper 99–GT–161, 1999.
Mostafa A. H., Tarek A. M., Samir S. A. and Karam M. E., An Investigation Of The Effect Of Anti-Vortex Film Cooling On A Flat Plate. Proceedings of ICFD 10:Tenth International Congress of Fluid Dynamics December 16-19, 2010, Stella Di Mare Sea Club Hotel, Ain Soukhna, Red Sea, Egypt, 2010.
Saumweber, C. and A. Schulz. "Comparison of the Cooling Performance of cylindrical and Fan Shaped Cooling Holes with Special Emphasis on the Effect of Internal Coolant Fross-Flow." In Proceedings of ASME Turbo Expo 2008. Berlin, Germany. June 9-13, 2008a.
http://dx.doi.org/10.1115/gt2008-51036
Incropera, F. P. and DeWitt, D. P. Introduction to Heat Transfer, New York: John Wiley & Sons, 2002.
Leedom, D. H., and S. Acharya. "Large Eddy Simulations of Film Cooling Flow Fields from Cylindrical and Shaped Holes." In Proceedings of ASME Turbo Expo 2008. Berlin, Germany. June 9-13, 2008.
http://dx.doi.org/10.1115/gt2008-51009
Ahmed, S., Nazari, A., Wahba, E., Numerical analysis of separation control over an airfoil section, (2014) International Review of Aerospace Engineering (IREASE), 7 (2), pp. 48-54.
Ghosh, S., Dennis, B., Han, Z., Numerical Investigation of Moisture Diffusion Effects on Underfill within Flip-Chip Packages, (2014) International Journal on Numerical and Analytical Methods in Engineering (IRENA), 2 (6), pp. 203-209.
Ahmed, S., Nazari, A., Numerical Study of Rotating Cylinder Effects on the Performance of a Symmetrical Airfoil Section, (2015) International Review on Modelling and Simulations (IREMOS), 8 (2), pp. 239-244.
http://dx.doi.org/10.15866/iremos.v8i2.5466
Abdulwahid, A., Lazim, T., Saat, A., Jaafar, M., Kareem, Z., Experimental Thermal Field Measurements of Film Cooling with Twisted Holes, (2015) International Review of Aerospace Engineering (IREASE), 8 (3), pp. 86-94.
http://dx.doi.org/10.15866/irease.v8i3.6124
Abdulwahid, A., Lazim, T., Saat, A., Kareem, Z., Investigation of Effect Holes Twisted Angle and Compound Angle of Holes on Film Cooling Effectiveness, (2015) International Review of Automatic Control (IREACO), 8 (3), pp. 244-250.
http://dx.doi.org/10.15866/ireaco.v8i3.6237
Driss, Z., Karray, S., Kchaou, H., Abid, M., Abid, M., Computer Simulations of Fluid-Structure Interaction Generated by a Flat-Blade Paddle in a Vessel Tank, (2014) International Review of Aerospace Engineering (IREASE), 7 (3), pp. 88-97.
Barata, J., Multiple Jet/Wall/Crossflow Interactions, (2014) International Review of Aerospace Engineering (IREASE), 7 (3), pp. 69-83.
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