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Film Cooling of a Concave Surface with Two-Row Coolant Supply in Trenches

  • STEAM-TURBINE, GAS-TURBINE, AND COMBINED-CYCLE POWER PLANTS AND THEIR AUXILIARY EQUIPMENT
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Abstract

The results of computer simulation of the film cooling efficiency on a concave surface with coolant supply through inclined round holes in shallow trenches are presented. The calculations were carried out in a range of blowing ratio m from 0.56 to 1.97 using the commercial computer package ANSYS CFX and the SST turbulence model. In the region between the trenches, the average (within an individual strip) cooling efficiency hardly changes at all in the transverse direction for all blowing ratios. Downstream of the second trench, the average cooling efficiency is nonuniform across the width of the concave surface and increases with the blowing ratio. The local (spot) cooling efficiency is nonuniform across the plate and becomes more uniform with an increase in the blowing ratio. For low blowing ratios, the number of local maximums in the cooling efficiency behind the first trench is equal to the number of film cooling holes. For m ≥ 1.12, the cooling efficiency is almost uniform and close to unity immediately behind the first trench, while it reduces on the side strips behind the second trench. The effectiveness of film cooling on a concave surface with two trenches has been demonstrated to be 5–11% lower than that on a flat surface under the same conditions.

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REFERENCES

  1. R. J. Goldstein, “Film cooling,” Adv. Heat Transfer 7, 321–379 (1971). https://doi.org/10.1016/S0065-2717(08)70020-0

    Article  Google Scholar 

  2. A. A. Khalatov, I. I. Borisov, Yu. Ya. Dashevskii, and S. B. Reznik, Heat Transfer and Hydrodynamics in the Fields of Centrifugal Mass Forces, Vol. 10: Perspective Schemes of Film Cooling (Kyiv. Politekh. Inst., Kyiv, 2016) [in Russian].

  3. R. S. Bunker, J. K. Bailey, C. Lee, and N. Abuaf, “Method for improving the cooling effectiveness of a gaseous coolant stream, and related articles of manufacture,” US Patent No. 6234755 (2001).

  4. R. S. Bunker, “Film cooling effectiveness due to discrete holes within a transverse surface slot,” in Proc. ASME Turbo Expo 2002: Power for Land, Sea, and Air, Amsterdam, The Netherlands, June 3–6, 2002 (American Society of Mechanical Engineers, 2002), Vol. 3, pp. 129–138, paper no. GT2002-30178. https://doi.org/10.1115/GT2002-30178

  5. S. K. Waye and D. G. Bogard, “High-resolution film cooling effectiveness measurements of axial holes embedded in a transverse trench with various trench configurations,” ASME J. Turbomach. 129, 293–302 (2007). https://doi.org/10.1115/1.2464141

    Article  Google Scholar 

  6. M. A. Danilov and A. A. Khalatov, “Computer simulation of film cooling when feeding the coolant into the duct with the inclination angle of the front vertical wall (β = 20°),” in Theoretical and Applied Problems of Physics, Mathematics and Computer Science: Proc. 18th All-Ukrainian Sci.-Pract. Conf. of Undergraduate and Postgraduate Students and Young Scientists, Kyiv, Ukraine, May 12–13, 2020 (Kyiv. Politekh. Inst., Kyiv, 2020), Vol. 1, pp. 68–71.

  7. A. A. Khalatov, I. I. Borisov, A. S. Kovalenko, Yu. Ya. Dashevskii, and S. V. Shevtsov, “Flat plate film cooling from a single-row inclined holes embedded in a trench: Effect of external turbulence and flow acceleration,” Thermophys. Aeromech. 20, 713–719 (2013).

    Article  Google Scholar 

  8. C. Yang and J. Zhang, “Influence of multi-hole arrangement on cooling film development,” Chin. J. Aeronaut. 25, 182–188 (2012). https://doi.org/10.1016/S1000-9361(11)60377-4

    Article  Google Scholar 

  9. A. A. Khalatov, E. Shi-Ju, D. Wang, and T. V. Donyk, “Film cooling behind two rows of trenches on a flat surface,” Thermophys. Aeromech. 27, 519–527 (2020).

    Article  Google Scholar 

  10. M. Y. Jabbari and R. J. Goldstein, “Adiabatic wall temperature and heat transfer downstream of injection through two rows of holes,” ASME J. Eng. Gas Turbines Power 100, 303–307 (1978). https://doi.org/10.1115/1.3446350

    Article  Google Scholar 

  11. R. F. Martinez-Botas and C. H. N. Yuen, “Measurement of local heat transfer coefficient and film cooling effectiveness through discrete holes,” in Proc. ASME Turbo Expo 2000: Power for Land, Sea, and Air, Munich, Germany, May 8–11, 2000 (American Society of Mechanical Engineers, 2000), paper no. 2000-GT-243. https://doi.org/10.1115/2000-GT-0243

  12. K. L. Harrison and D. G. Bogard, “Comparison of RANs turbulence models for prediction of film cooling performance,” in Proc. ASME Turbo Expo 2008: Power for Land, Sea, and Air, Berlin, Germany, June 9–13, 2008 (American Society of Mechanical Engineers, 2008), Vol. 4, pp. 1187–1196. paper no. GT2008-51423. https://doi.org/10.1115/GT2008-51423

  13. A. A. Khalatov, I. V. Shevchuk, A. A. Avramenko, S. G. Kobzar’, and T. A. Zheleznaya, Thermogasdynamics of Complex Flows over Curved Surfaces (Inst. Tekh. Teplofiz. Nat. Akad. Nauk. Ukr., Kyiv, 1999) [in Russian].

    Google Scholar 

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Authors and Affiliations

  1. Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, 03057, Kyiv, Ukraine

    A. A. Khalatov & T. V. Donyk

  2. National Technical University of Ukraine Igor Sikorsky Kyiv Polytechnic Institute, 03057, Kyiv, Ukraine

    A. A. Khalatov & T. V. Donyk

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  1. A. A. Khalatov
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  2. T. V. Donyk
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Correspondence to T. V. Donyk.

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Translated by T. Krasnoshchekova

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Khalatov, A.A., Donyk, T.V. Film Cooling of a Concave Surface with Two-Row Coolant Supply in Trenches. Therm. Eng. 68, 943–952 (2021). https://doi.org/10.1134/S0040601521120053

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  • DOI: https://doi.org/10.1134/S0040601521120053

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