IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v14y2021i1p186-d473520.html
   My bibliography  Save this article

The Effects of Hole Arrangement and Density Ratio on the Heat Transfer Coefficient Augmentation of Fan-Shaped Film Cooling Holes

Author

Listed:
  • Young Seo Kim

    (School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Korea)

  • Jin Young Jeong

    (School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Korea)

  • Jae Su Kwak

    (School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 10540, Korea)

  • Heeyoon Chung

    (Aeropropulsion Division, Korea Aerospace Research Institute, Daejeon 34133, Korea)

Abstract

An experimental study was performed to investigate the effects of the arrangement of fan-shaped film cooling holes and density ratio (DR) on heat transfer coefficient augmentation. Both single- and multi-row fan-shaped film cooling holes were considered. For the multi-row fan-shaped holes, the heat transfer coefficient was measured at DRs of 1 and 2, and both staggered and inline arrangements of holes were considered. For the single-row fan-shaped holes, DR = 1.0, 1.5, 2.0, and 2.5 and M = 1.0 and 2.0 conditions were tested. The mainstream velocity was 20 m/s, and the turbulence intensity and boundary layer thickness were 3.6% and 6 mm, respectively. The heat transfer coefficient was measured using the one-dimensional transient infrared thermography method. The results show that an increased heat transfer coefficient augmentation is observed between film cooling holes for the case with a smaller hole pitch and higher blowing ratio. For the given fan-shaped hole parameters, the effects of the row-to-row distance and hole arrangement are not significant. In addition, as the velocity difference between the mainstream and coolant increases, the heat transfer coefficient ratio increases.

Suggested Citation

  • Young Seo Kim & Jin Young Jeong & Jae Su Kwak & Heeyoon Chung, 2021. "The Effects of Hole Arrangement and Density Ratio on the Heat Transfer Coefficient Augmentation of Fan-Shaped Film Cooling Holes," Energies, MDPI, vol. 14(1), pages 1-16, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:1:p:186-:d:473520
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/14/1/186/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/14/1/186/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:14:y:2021:i:1:p:186-:d:473520. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.