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Journal of Thermal Science

热科学学报

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2023 , Vol. 32 >Issue 1: 330 - 350

DOI: https://doi.org/10.1007/s11630-022-1679-5

Investigation of Interacting Mechanism between Film Cooling and Internal Cooling Structures of Turbine Blade

  • ZHANG Guohua ,
  • XIE Gongnan ,
  • BENGT Sundén
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  • 1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
    2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, China
    3. Department of Energy Sciences, Lund University, Lund SE-22100, Sweden
    4. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China

Online published: 2023-11-28

Supported by

The research work is supported by the National Natural Science Foundation of China (51676163), the Fundamental Research Fund of Shenzhen City of China (JCYJ20170306155153048), the National 111 Project under Grant No. B18041, and the China Scholarship Council (CSC). Parts of the computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at LUNARC and partially funded by the Swedish Research Council.

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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Abstract

This paper presents three-dimensional numerical simulations with the established realizable k-ε model to clarify the underlying and interacting mechanisms between the film cooling and the internal cooling. On the one hand, the effects of three different internal cooling channels, i.e., smooth channel, continuous ribbed channel, and truncated ribbed channel, on the film cooling effectiveness and the discharge coefficients are investigated. On the other hand, the influences of three different film cooling holes, i.e., cylindrical hole, two elliptical holes and two circular-to-elliptical holes, on the heat transfer performances and pressure loss of the internal cooling channel are revealed. Especially, the suction effects of the film cooling holes are analyzed through setting up baselines with only internal cooling channels. Results show that the placement of ribs in the internal channel has different influences on the film cooling effectiveness with respect to different hole shapes depending on the blowing ratio. The discharge coefficient of the film hole can be improved by introducing ribs to the internal channel. Suction of film hole is helpful for enhancing the heat transfer performance and reducing the pressure loss of the internal channel. Besides, ribs instead of the suction effect of film hole play a major role to enhance the heat transfer performance in the internal cooling channel.

Key words： interacting mechanism; film cooling effectiveness; discharge coefficient; heat transfer performance; pressure drop

Cite this article

ZHANG Guohua , XIE Gongnan , BENGT Sundén . Investigation of Interacting Mechanism between Film Cooling and Internal Cooling Structures of Turbine Blade[J]. Journal of Thermal Science, 2023 , 32(1) : 330 -350 . DOI: 10.1007/s11630-022-1679-5

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Sponsored by: Institute of Engineering Thermophysics, Chinese Academy of Sciences　Publisher: Science Press

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