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Study on Flow and Heat Transfer Characteristics and Anti-Clogging Performance of Tree-Like Branching Microchannels

Author

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  • Linqi Shui

    (Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry, Key Laboratory of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xi’an 710048, China)

  • Zhongkai Hu

    (Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry, Key Laboratory of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xi’an 710048, China)

  • Hang Song

    (Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry, Key Laboratory of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xi’an 710048, China)

  • Zhi Zhai

    (School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Jiatao Wang

    (Key Laboratory of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry, Key Laboratory of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xi’an 710048, China)

Abstract

In this paper, a tree-like branching microchannel with bifurcating interconnections is designed for gas turbine blade cooling. A theoretical analysis, experimental study, and numerical simulation of the heat transfer and hydrodynamic characteristics of the tree-like branching microchannel is performed, and the influence of the total number of branching levels m on the anti-clogging performance is also studied. The results indicate that the total heat transfer ratio and pressure drop ratio are closely related to the structur ne parameters. The comprehensive thermal performance increase with an increase in the ratio of L b / L 0 and fractal dimension D. Nu / Nu s , f / f s , and η are increased as m increases from 3 to 5. Furthermore, the tree-like microchannel network exhibits robustness for cooling gas turbine blades. A greater total number of branching levels and a higher Re number are advantageous for enhancing the anti-clogging performance of the tree-like branching microchannel.

Suggested Citation

  • Linqi Shui & Zhongkai Hu & Hang Song & Zhi Zhai & Jiatao Wang, 2023. "Study on Flow and Heat Transfer Characteristics and Anti-Clogging Performance of Tree-Like Branching Microchannels," Energies, MDPI, vol. 16(14), pages 1-22, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:14:p:5531-:d:1199243
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    References listed on IDEAS

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    1. Zhong Ren & Xiaoyu Yang & Xunfeng Lu & Xueying Li & Jing Ren, 2021. "Experimental Investigation of Micro Cooling Units on Impingement Jet Array Flow Pressure Loss and Heat Transfer Characteristics," Energies, MDPI, vol. 14(16), pages 1-21, August.
    2. Kenichiro Takeishi, 2022. "Evolution of Turbine Cooled Vanes and Blades Applied for Large Industrial Gas Turbines and Its Trend toward Carbon Neutrality," Energies, MDPI, vol. 15(23), pages 1-35, November.
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    4. Joon Ahn, 2023. "Large Eddy Simulation of Flow and Heat Transfer in a Ribbed Channel for the Internal Cooling Passage of a Gas Turbine Blade: A Review," Energies, MDPI, vol. 16(9), pages 1-20, April.
    5. Chien-Shing Lee & Tom I. -P. Shih & Kenneth Mark Bryden & Richard P. Dalton & Richard A. Dennis, 2023. "Strongly Heated Turbulent Flow in a Channel with Pin Fins," Energies, MDPI, vol. 16(3), pages 1-21, January.
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