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Effect of Inlet Compound Angle of Backward Injection Film Cooling Hole

Author

Listed:
  • Yoon Seong Jeong

    (Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea)

  • Jun Su Park

    (Automotive Engineering, Korea National University of Transportation, Chungju 27469, Korea)

Abstract

Backward injection film cooling holes were studied to improve film cooling effectiveness using simple cylindrical holes, and this principle was applied to an actual gas turbine. Although film cooling effectiveness was improved using a backward injection film cooling hole, the backward flow of combustion gas from the backward injection cooling hole was one of the major reasons for cracks in the hot components. To prevent cracks and backward flow in the backward injection film cooling hole, this study changed the inlet compound angle of the backward injection film cooling hole. Numerical analysis using CFX v. 17.0 was performed to calculate the flow characteristics and film cooling effectiveness of backward injection film cooling. Aa a result, the effect of the inlet compound angle of the backward injection film cooling hole was confirmed to prevent the backward flow, which increased upon increasing the inlet compound angle. This study shows that the backward flow and cracks in the backward injection film cooling hole can be prevented simply by changing the inlet compound angle.

Suggested Citation

  • Yoon Seong Jeong & Jun Su Park, 2020. "Effect of Inlet Compound Angle of Backward Injection Film Cooling Hole," Energies, MDPI, vol. 13(4), pages 1-11, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:808-:d:319907
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    Citations

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    Cited by:

    1. Ke Tian & Zicheng Tang & Jin Wang & Milan Vujanović & Min Zeng & Qiuwang Wang, 2021. "Numerical Investigations of Film Cooling and Particle Impact on the Blade Leading Edge," Energies, MDPI, vol. 14(4), pages 1-14, February.
    2. Shengchang Zhang & Chunhua Wang & Xiaoming Tan & Jingzhou Zhang & Jiachen Guo, 2022. "Numerical Investigation on Backward-Injection Film Cooling with Upstream Ramps," Energies, MDPI, vol. 15(12), pages 1-20, June.

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