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Film Cooling for a Cylindrical Hole with Downstream Crescent-Shaped Block with Perpendicular Crossflow

  • HEAT CONDUCTION AND HEAT TRANSFER IN TECHNOLOGICAL PROCESSES
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Journal of Engineering Physics and Thermophysics Aims and scope

Recent studies reveal that an internal coolant crossflow plays an important role in the flow field and film cooling performance in the near-hole region. In the present paper a single array of cylindrical holes with crescent-shaped blocks downstream is considered. The cooling performance under the quiescent coolant plenum conditions with a perpendicular coolant crossflow are studied numerically at the blowing ratios 0.5–2.5. The height-to-diameter ratio of the crescent-shaped block varies from 0.25 to 1.0 with an interval of 0.25. Based on the numerical results, it may be deduced that a perpendicular crossflow induces an asymmetric pair of in-hole vortices and a biased coolant coverage on the surface downstream of the hole exit. However, the bias direction depends on the value of the blowing ratio. Compared with the quiescent plenum case, the perpendicular crossflow reduces the cooling performance, and the benefits result from the crescent-shaped block downstream.

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Authors and Affiliations

  1. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin, 300384, China

    C. Zhang, P. F. Zhang & P. F. Ju

  2. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology), Tianjin, 300384, China

    C. Zhang, P. F. Zhang & P. F. Ju

Authors
  1. C. Zhang
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  2. P. F. Zhang
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  3. P. F. Ju
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Correspondence to P. F. Ju.

Additional information

Published in Inzhenerno-Fizicheskii Zhurnal, Vol. 95, No. 3, pp. 614–622, May–June, 2022.

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Zhang, C., Zhang, P.F. & Ju, P.F. Film Cooling for a Cylindrical Hole with Downstream Crescent-Shaped Block with Perpendicular Crossflow. J Eng Phys Thermophy 95, 599–607 (2022). https://doi.org/10.1007/s10891-022-02516-9

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  • DOI: https://doi.org/10.1007/s10891-022-02516-9

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