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Determination of Film Cooling Effectiveness and Heat Transfer Coefficient Simultaneously on a Flat Plate

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  • Mingjie Zhang

    (State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China)

Abstract

In this paper, flat plate film cooling with two rows of compound angle cylindrical film cooling holes was investigated. A data processing method was evaluated which could determine the film cooling effectiveness and heat transfer coefficient simultaneously from the transient wall temperature data. The method was based on solving an inverse problem of the one-dimensional transient heat conduction equation. To evaluate the performance of the method, wall temperature data were obtained using the known film cooling effectiveness and heat transfer coefficient data as the convection boundary condition. Then, the method was applied to calculate the film cooling effectiveness and heat transfer coefficient based on the wall temperature data. Different blowing ratios, heat transfer coefficients, mainstream temperatures, and material thermal conductivities were investigated. In general, the data and calculation were in good agreement. It was found that the error decreased when the heat transfer coefficient increased and the material thermal conductivity decreased. The percentage error of the span-wise averaged film cooling effectiveness was mainly between 0% and 10%, and the percentage error of the span-wise averaged heat transfer coefficient was mainly between 0% and 4%.

Suggested Citation

  • Mingjie Zhang, 2022. "Determination of Film Cooling Effectiveness and Heat Transfer Coefficient Simultaneously on a Flat Plate," Energies, MDPI, vol. 15(11), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:4144-:d:831851
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    References listed on IDEAS

    as
    1. Jin Hang & Jingzhou Zhang & Chunhua Wang & Yong Shan, 2022. "Numerical Investigation of Single-Row Double-Jet Film Cooling of a Turbine Guide Vane under High-Temperature and High-Pressure Conditions," Energies, MDPI, vol. 15(1), pages 1-22, January.
    2. Emmanuel Laroche & David Donjat & Philippe Reulet, 2021. "A Combined Experimental and Numerical Characterization of the Flowfield and Heat Transfer around a Multiperforated Plate with Compound Angle Injection," Energies, MDPI, vol. 14(3), pages 1-26, January.
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