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Heat Transfer Enhancement in Turbine Blade Internal Cooling Channels with Hybrid Pin-Fins and Micro V-Ribs Turbulators

Author

Listed:
  • Longbing Hu

    (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    China United Heavy Duty Gas Turbine Technology Co., Ltd., Shanghai 201306, China)

  • Qiuru Zuo

    (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Yu Rao

    (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Abstract

To improve the convective heat transfer in internal cooling channels of heavy-duty gas turbine blades, this study experimentally and numerically investigates the thermal performance of rectangular channels with hybrid pin-fins and micro V-ribs turbulators. The transient thermochromic liquid crystal (TLC) technique and ANSYS 2019 R3 (ICEM CFD 2019 R3, Fluent 2019 R3, CFD-Post 2019 R3) were employed under Reynolds numbers ranging from 10,000 to 50,000, with the numerical model rigorously validated against experimental data (the maximum RMSE is 2.5%). It is found that hybrid pin-fins and continuous V-ribs configuration exhibits the maximum heat transfer enhancement of 27.6%, with an average friction factor increase of 13.3% and 21.9% improvement in thermal performance factor (TPF) compared to the baseline pin-fin channel. In addition, compared to the baseline pin-fin channel, hybrid pin-fins and broken V-ribs configuration exhibits average heat transfer enhancement (Nu/Nu0) of 24.4%, an average friction factor increase of 7.2% and 22.5% improvement across the investigated Reynolds number range (10,000~50,000) based on computational results. The synergistic effects of hybrid pin-fin and micro V-rib structures demonstrate superior coolant flow control, offering a promising solution for next-generation turbine blade cooling designs. This work provides actionable insights for high-efficiency gas turbine thermal management.

Suggested Citation

  • Longbing Hu & Qiuru Zuo & Yu Rao, 2025. "Heat Transfer Enhancement in Turbine Blade Internal Cooling Channels with Hybrid Pin-Fins and Micro V-Ribs Turbulators," Energies, MDPI, vol. 18(13), pages 1-16, June.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:13:p:3296-:d:1685922
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    References listed on IDEAS

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    1. Wen Wang & Yan Yan & Yeqi Zhou & Jiahuan Cui, 2022. "Review of Advanced Effusive Cooling for Gas Turbine Blades," Energies, MDPI, vol. 15(22), pages 1-28, November.
    2. Byeong-Cheon Kim & Kyoungsik Chang, 2020. "Assessment of Hybrid RANS/LES Models in Heat and Fluid Flows around Staggered Pin-Fin Arrays," Energies, MDPI, vol. 13(14), pages 1-17, July.
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