The results of computer simulation of the efficiency of film cooling on a convex cooled surface when supplying a coolant through inclined round holes in “shallow” trenches are presented. The calculations were performed using the commercial package ANSYS CFX in the range of change of the injection parameter from 0.55 to 1.93, with the SST model of turbulence being used in the calculations. On the convex surface, a symmetry of the adiabatic efficiency of film cooling with respect to the longitudinal axis is observed demonstrating the stability of the cooling air in the near-wall layer. At small injection parameters, a transverse nonuniformity is observed with maxima of the local cooling efficiency behind the film cooling holes, whereas with an increase in the injection parameter, the transverse unevenness is reduced behind both trenches. It is shown that for the configuration under study, the efficiency of film cooling on a convex surface is approximately the same as on a flat surface, which is due to the acceleration of the main flow and the positive pressure gradient along the channel height.
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References
R. J. Goldstein, Film cooling, Adv. Heat Transf., No. 7, 321–379 (1971).
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, Promising Film Cooling Schemes [in Russian], Izd. Nats. Tekhn. Univ. Ukrainy “Kievsk. Politekh. Inst.,” Kiev (2016).
US Patent. Method for Improving the Cooling Effectiveness of a Gaseous Coolant Stream, and Related Articles of Manufacture, R. S. Bunker, J. K. Bailey, C. Lee, and N. Abuaf, No. 6 234 755, 22.05.2001, filled in 04.10.1999.
R. S. Bunker, Film cooling effectiveness due to discrete holes within a transverse surface slot, ASME Paper, No. GT2002–30178 (2002).
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 Paper, No. GT2006–90226 (2006).
M. A. Danilov and A. A. Khalatov, Computer simulation of hot water cooling when supplying a coolant into a trench with an inclination of the front vertical wall (β = 20°), in: Proc. 18th All-Ukrainian Sci.-Pract. Conf. of Students, Graduate Students, and Young Scientists, Vol. 1, pp. 68–71 (2020).
S. A. Isaev, P. A. Baranov, N. A. Kudryavtsev, and A. E. Usachov, Analysis of vortex heat transfer in a transverse flow past a trench on a plane using multiblock computation technologies and different semi-empirical models of turbulence, J. Eng. Phys. Thermophys., 77, No. 6, 1236–1246 (2004).
C. Yang and J. Zhang, Influence of multi-hole arrangement on cooling film development, Chinese J. Aeronaut., No. 25, 182-188 (2012).
A. A. Khalatov, E. Shi-Ju, D. Wang, and T. V. Donik, Film cooling behind two rows of trenches on a flat surface, Teplofiz. Aéromekh., 27, No. 4, 545–554 (2020).
M. Y. Jabbari and R. J. Goldstein, Adiabatic wall temperature and heat transfer downstream of injection through two rows of holes, ASME J. Eng. Power, 100, 303–307 (1978).
R. F. Martinez-Botas and C. H. N. Yuen, Measurement of local heat transfer coefficient and film cooling effectiveness through discrete holes, ASME Paper, No. GT2000–243 (2000).
A. A. Khalatov and T. V. Donik, Film cooling of the concave surface with two-row coolant supply into trenches, Teploénergetika, No. 12, 76–86 (2021).
S. A. Isaev, A. I. Leontiev, P. A. Baranov, Kh. T. Metov, and A. E. Usachov, Numerical analysis of the effect of viscosity on the vortex dynamics in laminar separated flow past a dimple on a plane with allowance for its arguments, J. Eng. Phys. Thermophys., 74, No. 2, 339–346 (2001).
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 96, No. 5, pp. 1266–1274, September–October, 2023.
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Khalatov, A.A., Donik, T.V. & Panchenko, N.A. Film Cooling of a Convex Surface with Coolant Supply Through Two Rows of Transverse Trenches. J Eng Phys Thermophy 96, 1257–1264 (2023). https://doi.org/10.1007/s10891-023-02791-0
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DOI: https://doi.org/10.1007/s10891-023-02791-0