Effects of Blowing Ratio on Multiple Shallow Angle Film Cooling Holes

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This paper presents the investigation on the effects of the blowing ratio of multiple shallow angle film cooling holes. Multiple film cooling holes having a shallow hole angle (θ = 20°), arranged to perform in-line hole configuration has been considered in the present study. The investigation focuses on the effects of high blowing ratio of the film cooling effectiveness which have been carried out at ReD = 3100 and BR = 2.0, 3.0 and 4.0. The experiments make use of the IR camera in capturing the surface temperature to determine the film cooling effectiveness. The contours of the film cooling effectiveness distribution together with plots on laterally average film cooling effectiveness along the x/D are presented. The discussions have been made with a support of the temperature field captured at x/D = 3, 13, 23, and 33. The results clearly show the benefit of the employment of shallow hole angle (θ = 20°) at high blowing ratio which is much more superior in comparison to the common hole configuration (θ = 35°).

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Edited by:

R. Varatharajoo, E. J. Abdullah, D. L. Majid, F. I. Romli, A. S. Mohd Rafie and K. A. Ahmad

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49-54

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K. Abdullah and K. I. Funazaki, "Effects of Blowing Ratio on Multiple Shallow Angle Film Cooling Holes", Applied Mechanics and Materials, Vol. 225, pp. 49-54, 2012

Online since:

November 2012

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$38.00

[1] Goldstien, R. J, 1971, Film Cooling, Advance Heat Transfer, Vol. 7, p.321– 329.

[2] Han, J. C., Dutta, S., and Ekkad, S, 2000, Gas Turbine Heat Transfer and Cooling Technology, Taylor and Francis, New York.

[3] Bunker, R. S., 2009, Film Cooling: Breaking the Limits of Diffusion Shaped Holes, Proceeding of International Symposium on Heat Transfer in Gas Turbine System, Antalya, Turkey.

DOI: https://doi.org/10.1615/ichmt.2009.heattransfgasturbsyst.160

[4] Ligrani, P. M., Wingle, J. M., Ceriello, S., and Jakson, S.W., 1994, Film Cooling from Holes with Compound Angle Orientations Part 1: Results Downstream of Two Staggered Rows of Holes with 3d Spanwise Spacing, ASME Journal of Heat Transfer, Vol. 116, p.341.

DOI: https://doi.org/10.1115/1.2911406

[5] Ligrani, P.M., Wingle, J.M., Ceriello, S., and Jakson, S.W., 1994, Film Cooling from Holes with Compound Angle Orientations Part 1: Results Downstream of Two Staggered Rows of Holes with 3d Spanwise Spacing, ASME Journal of Heat Transfer, Vol. 116, p.341.

DOI: https://doi.org/10.1115/1.2911406

[6] Gustafsson, K. M. B, and Johansson, 2001, An Experimental Study of Temperature Distribution on Effusion-Cooled Blade, ASME Journal of Engineering for Gas Turbines and Power, Vol. 123, pp.308-316.

DOI: https://doi.org/10.1115/1.1364496

[7] Kamil, A., Funazaki, K., Onodera, H., and Ideta, T., 2012, Experimental Investigations on Aero-Thermal Interaction of Film Cooling Airs Ejected from Multiple Holes: Shallow Hole Angle, Proceeding of ASME Turbo Expo 2012, Copenhagen, Denmark, pp. GT2012-68215.

DOI: https://doi.org/10.1115/gt2012-68215

[8] Kamil, A., Onodera, H., and Funazaki, K., 2012, Experimental and Numerical Investigation On Flowfield of Film Cooling from Multiple Holes, Proceeding of International Conference on Mechanical and Electrical Technology 2012, Kuala Lumpur, Malaysia.

DOI: https://doi.org/10.4028/www.scientific.net/amm.229-231.2094

[9] Ekkad, S. V., Shicuan Ou, and Rivir, B. R., 2004, A Transient Infrared Thermography Method for Simultaneous Film Cooling Effectiveness and Heat Transfer Coefficient Measurements From a Single Test, ASME Journal of Turbomachinery, Vol. 126, pp.597-603.

DOI: https://doi.org/10.1115/1.1791283

[10] Tropea, C., Yarin, A., Foss, J., 2007, Measurement of Surface Heat Transfer Characteristics Using Infrared Imaging, Springer Handbook for Experimental Fluid Mechanics, Springer-Verlag Publisher, pp.500-515.

DOI: https://doi.org/10.1007/978-3-540-30299-5

[11] S. R. Sargent, C. R. Hedlund, and P. M. Ligrani, 1998, An Infrared Thermography Imaging System for Convective Heat Transfer Measurements in Complex Flow, Measurement Science and Technology, Vol. 9, p.1974-(1981).

DOI: https://doi.org/10.1088/0957-0233/9/12/008

[12] Rebekah A. R., Alfred, D., and Wright, L. M., 2009, Measurement of Details Heat Transfer Coefficient and Film Cooling Effectiveness Distribution using PSP and TSP, Proceeding of ASME Turbo Expo 2009, Orlando, USA, pp. GT2009–59975.

DOI: https://doi.org/10.1115/gt2009-59975

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