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Large Eddy Simulation of Film Cooling: A Review

Author

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  • Joon Ahn

    (School of Mechanical Engineering, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Republic of Korea)

Abstract

Film cooling has dramatically contributed to the performance improvement of gas turbines, as it is a very effective cooling technique for gas turbines. Large eddy simulation (LES) began to be used in the study of film cooling 20 years ago, and meaningful results have been found, but it has not yet been intensively reviewed. In this review paper, we analyze and introduce about 70 papers published on LES of film cooling over the past 20 years. Numerical instability must be overcome, and realistic inflow must be generated to perform LES of film cooling. This review summarizes how the groups that performed LES of film cooling solved these problems. In film-cooling research, the main topics are improving the film-cooling performance by preventing the lift-off of the injectant and the effect of flow conditions on film cooling. In addition, LES has also been conducted extensively on the above two topics, and this review focuses on them. Finally, turbulence statistics of film-cooling flow obtained from LES are introduced, and future challenges of film-cooling LES are predicted.

Suggested Citation

  • Joon Ahn, 2022. "Large Eddy Simulation of Film Cooling: A Review," Energies, MDPI, vol. 15(23), pages 1-21, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:23:p:8876-:d:982847
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    References listed on IDEAS

    as
    1. Seung-Il Baek & Joon Ahn, 2022. "Effects of Bulk Flow Pulsation on Film Cooling Involving Compound Angle," Energies, MDPI, vol. 15(7), pages 1-19, April.
    2. Seung-Il Baek & Joon Ahn, 2021. "Large Eddy Simulation of Film Cooling Involving Compound Angle Hole with Bulk Flow Pulsation," Energies, MDPI, vol. 14(22), pages 1-18, November.
    3. Seung Il Baek & Jaiyoung Ryu & Joon Ahn, 2021. "Large Eddy Simulation of Film Cooling with Forward Expansion Hole: Comparative Study with LES and RANS Simulations," Energies, MDPI, vol. 14(8), pages 1-19, April.
    4. Young Seok Kang & Dong-Ho Rhee & Yu Jin Song & Jae Su Kwak, 2021. "Large Eddy Simulations on Film Cooling Flow Behaviors with Upstream Turbulent Boundary Layer Generated by Circular Cylinder," Energies, MDPI, vol. 14(21), pages 1-17, November.
    5. Sandip Dutta & Inderjot Kaur & Prashant Singh, 2022. "Review of Film Cooling in Gas Turbines with an Emphasis on Additive Manufacturing-Based Design Evolutions," Energies, MDPI, vol. 15(19), pages 1-35, September.
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    Cited by:

    1. 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.

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