Heat transfer in rotating two-pass channel with bleed holes on tip surface

Ho Seong Sohn, Namgeon Yun, Jun Su Park, Hyung Hee Cho, Kyung Min Kim, Beom Soo Kim, Byung Moon Jang

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

1 Citation (Scopus)

Abstract

Effusion flow from a blade tip region, not only protect the blade tip directly against hot gas but also influence the cooling performance of the internal cooling passage. The present study investigated the heat/mass transfer of a rotating two-passage rectangular duct using three different types of effusion hole arrays on the internal tip surface. The duct inlet was 80 mm × 16 mm, and the hydraulic diameter was 26.67 mm. The Reynolds number, which is based on the hydraulic diameter, was 10,000. The mass flow rate of the effusion flow was 10% of the total inlet mass flow. The naphthalene sublimation method was used to determine the local heat/mass transfer coefficient. The results indicated that effusion flow enhanced the heat transfer on the tip surface: they decreased the recirculation flow and counter-rotating flow in the turning region of the internal passage. The effusion holes enhanced the local heat transfer around holes due to local secondary flows such as tripping flows. The rotating channel had a different heat transfer distribution compared to the stationary channel due to Coriolis and centrifugal forces.

Original languageEnglish
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791845714
DOIs
Publication statusPublished - 2014 Jan 1
EventASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014 - Dusseldorf, Germany
Duration: 2014 Jun 162014 Jun 20

Publication series

NameProceedings of the ASME Turbo Expo
Volume5A

Other

OtherASME Turbo Expo 2014: Turbine Technical Conference and Exposition, GT 2014
CountryGermany
CityDusseldorf
Period14/6/1614/6/20

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Sohn, H. S., Yun, N., Park, J. S., Cho, H. H., Kim, K. M., Kim, B. S., & Jang, B. M. (2014). Heat transfer in rotating two-pass channel with bleed holes on tip surface. In Heat Transfer (Proceedings of the ASME Turbo Expo; Vol. 5A). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2014-27254