Heat/mass transfer measurement within a film cooling hole of square and rectangular cross sections

Hyung Hee Cho, Seung Goo Kang, Dong Ho Rhee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

An experimental study has been conducted to investigate the heat/mass transfer characteristics within film cooling holes of square and rectangular cross-section. The experiments for this study have been performed using a naphthalene sublimation method, and the flow field has been analyzed by numerical calculation using a commercial code (FLUENT). The rectangular cross-section has the aspect ratio of 2 and the same hydraulic diameter as the square cross-section. A duct flow enters into a film cooling hole in a cross-direction. For the film cooling hole with square cross-section, it is observed that the reattachment of separated flow and the vortices within the hole enhance considerably the heat/mass transfer around the hole entrance region. The heat/mass transfer on the leading edge side of hole exit region increases as the blowing rates decrease because the mainflow induces a secondary vortex. Heat/mass transfer patterns within the film cooling hole are changed slightly with the various Reynolds numbers. For the film cooling hole with rectangular cross-section, overall heat/mass transfer characteristics are similar with those for the square cross-section. However, heat/mass transfer on the leading edge side of hole entrance region has two peak regions due to split flow reattachment, and heat/mass transfer on the leading edge side of hole exit region is less sensitive to the blowing ratios than the square cross-section case.

Original languageEnglish
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791878521
DOIs
Publication statusPublished - 2001 Jan 1
EventASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001 - New Orleans, LA, United States
Duration: 2001 Jun 42001 Jun 7

Publication series

NameProceedings of the ASME Turbo Expo
Volume3

Other

OtherASME Turbo Expo 2001: Power for Land, Sea, and Air, GT 2001
CountryUnited States
CityNew Orleans, LA
Period01/6/401/6/7

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Cho, H. H., Kang, S. G., & Rhee, D. H. (2001). Heat/mass transfer measurement within a film cooling hole of square and rectangular cross sections. In Heat Transfer; Electric Power; Industrial and Cogeneration (Proceedings of the ASME Turbo Expo; Vol. 3). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/2001-GT-0128