Abstract
The aim of this study is to predict the improvement in film cooling performance over a flat plate through a single row of cylindrical holes with different streamwise angles by using the Ansys CFX software package. In order to improve the film cooling effectiveness, a short crescent-shaped block is placed downstream of a cylindrical cooling hole. The numerical results of the cylindrical hole without the downstream short crescent-shaped block are compared with experimental data.
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References
J. C. Han, S. Dutta, S. V. Ekkad, Gas Turbine Heat Transfer and Cooling Technology (Taylor and Francis, London, 2000).
K. Thole, M. Gritsch, A. Schulz, and S. Wittig, “Flowfield Measurements for Film-Cooling Holes with Expanded Exits,” ASME, J. Turbomachinery 120, 327–336 (1998).
M. Gritsch, A. Schulz, and S. Wittig, “Adiabatic Wall Effectiveness Measurements of Film-Cooling Holes with Expanded Exits,” ASME, J. Turbomachinery 120, 549–556 (1998).
A. Azzi, M. Abidat, and B. A. Jubran, “Film Cooling Predictions of Simple and Compound Angle Injection from One and Two Staggered Rows,” Numer. Heat Transfer, Part A 40, 273–294 (2001).
H. Nasir, S. V. Ekkad, and S. Acharya, “Effect of Compound Angle Injection on Flat Surface Film Cooling with Large Streamwise Injection Angle,” Experiment. Thermal Fluid Sci. 25 (1/2), 23–29 (2001).
R. S. Bunker, “Film Cooling Effectiveness due to Discrete Holes within a Transverse Surface Slot,” ASME Paper No. GT2002-30178 (2002).
H. Nasir, S. Acharya, and S. Ekkad, “Improved Film Cooling from Cylindrical Angled Holes with Triangular Tabs: Effect of Tab Orientations,” Int. J. Heat Fluid Flow 24, 657–668 (2003).
D. L. Schmidt, B. Sen, and D. G. Bogard, “Film Cooling with Compound Angle Holes: Adiabatic Effectiveness,” ASME, J. Turbomachinery 118, 807–813 (1996).
Y. Yu, C.-H. Yen, T. I.-P. Shih, et al., “Film Cooling Effectiveness and Heat Transfer Coefficient Distributions Around Diffusion Shaped Holes,” Trans. ASME, J. Heat Transfer 124, 820–827 (2002).
K. B. M. Q. Zaman and J. K. Foss, “The Effect of Vortex Generators on a Jet in a Crossflow,” Phys. Fluids 9 (1), 106–114 (1997).
S. Na and T. I.-P. Shih, “Increasing Adiabatic Film Cooling Effectiveness by Using an Upstream Ramp,” in Proc. of GT2006, ASME Turbo Expo 2006: Power for Land, Sea and Air, Barcelona (Spain), May 8–11, 2006.
G. J. Sturgess, “Design of Combustor Xiiling Slot for High Film Effectiveness. Pt. 1. Film General Development,” ASME Paper No. 85-GT-35 (1985).
G. J. Sturgess, “Design of Combustor Xiiling Slot for High Film Effectiveness. Pt. 2. Film Initial Region,” ASME Paper No. 85-GT-36 (1985).
R. J. Goldstein, E. R. G. Eckert, H. D. Chiang, and E. Elovic, “Effect of Surface Roughness on Film Cooling Performance,” ASME, J. Eng. Gas Turbines Power 107, 111–116 (1985).
D. L. Schmidt and D. G. Bogard, “Effects of Free-Stream Turbulence and Surface Roughness on Film Cooling,” ASME Paper No. 96-GT-462 (1996).
D. L. Schmidt, B. Sen, and D. G. Bogard, “Effects of Surface Roughness on Film Cooling,” ASME Paper No. 96-GT-299 (1996).
J. D. Heidmann and S. Ekkad, “A Novel Anti-Vortex Turbine Film Cooling Hole Concept,” ASME Paper No. GT2007-27528 (2007).
B. An, J. Liu, Ch. Zhang, and S. Zhou, “Film Cooling of Cylindrical Hole with a Downstream Short Crescent-Shaped Block,” ASME Paper 135, 031702-1 (2013).
F. R. Menter, “Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications,” AIAA J. 32 (8), 1598–1605 (1994).
A. Kohli and D. Bogard, “Adiabatic Effectiveness Thermal Fields and Velocity Fields for Film Cooling with Large Angle Injection,” ASME, J. Turbomachinery 119, 352–358 (1997).
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 57, No. 4, pp. 107–113, July–August, 2016.
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Khorsi, A., Guelailia, A. & Hamidou, M.K. Improvement of film cooling effectiveness with a small downstream block body. J Appl Mech Tech Phy 57, 666–671 (2016). https://doi.org/10.1134/S0021894416040106
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DOI: https://doi.org/10.1134/S0021894416040106