Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes

Heeyoon Chung, Jun Su Park, Ho Seong Sohn, Dong Ho Rhee, Hyung Hee Cho

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

6 Citations (Scopus)

Abstract

We propose an improved hole array to enhance the cooling performance of a perforated blockage. The internal passage in the trailing region of the blade was modeled as a wide square channel with three parallel blockages. Various configurations of perforated blockages were tested with a fixed Reynolds number. The baseline design had holes positioned along the centerline of the blockage in the lateral direction, and the array pattern, hole size, and hole direction were manipulated to enhance the cooling performance. Experiments were performed to obtain information on heat transfer and pressure loss. A naphthalene sublimation method was adopted to obtain detailed heat transfer distributions on the surfaces, using the correlation between heat and mass transfer. The pressure was measured at several points to evaluate the pressure loss. The proposed inclined hole array showed noticeably improved cooling performance, as much as 50% higher than the conventional configuration.

Original languageEnglish
Title of host publicationASME Turbo Expo 2013
Subtitle of host publicationTurbine Technical Conference and Exposition, GT 2013
DOIs
Publication statusPublished - 2013 Dec 17
EventASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 - San Antonio, Tx, United States
Duration: 2013 Jun 32013 Jun 7

Publication series

NameProceedings of the ASME Turbo Expo
Volume3

Other

OtherASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013
CountryUnited States
CitySan Antonio, Tx
Period13/6/313/6/7

Fingerprint

Turbomachine blades
Gas turbines
Heat transfer
Cooling
Sublimation
Naphthalene
Reynolds number
Mass transfer
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Chung, H., Park, J. S., Sohn, H. S., Rhee, D. H., & Cho, H. H. (2013). Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes. In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013 (Proceedings of the ASME Turbo Expo; Vol. 3). https://doi.org/10.1115/GT2013-95445
Chung, Heeyoon ; Park, Jun Su ; Sohn, Ho Seong ; Rhee, Dong Ho ; Cho, Hyung Hee. / Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes. ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013. 2013. (Proceedings of the ASME Turbo Expo).
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abstract = "We propose an improved hole array to enhance the cooling performance of a perforated blockage. The internal passage in the trailing region of the blade was modeled as a wide square channel with three parallel blockages. Various configurations of perforated blockages were tested with a fixed Reynolds number. The baseline design had holes positioned along the centerline of the blockage in the lateral direction, and the array pattern, hole size, and hole direction were manipulated to enhance the cooling performance. Experiments were performed to obtain information on heat transfer and pressure loss. A naphthalene sublimation method was adopted to obtain detailed heat transfer distributions on the surfaces, using the correlation between heat and mass transfer. The pressure was measured at several points to evaluate the pressure loss. The proposed inclined hole array showed noticeably improved cooling performance, as much as 50{\%} higher than the conventional configuration.",
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Chung, H, Park, JS, Sohn, HS, Rhee, DH & Cho, HH 2013, Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes. in ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013. Proceedings of the ASME Turbo Expo, vol. 3, ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013, San Antonio, Tx, United States, 13/6/3. https://doi.org/10.1115/GT2013-95445

Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes. / Chung, Heeyoon; Park, Jun Su; Sohn, Ho Seong; Rhee, Dong Ho; Cho, Hyung Hee.

ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013. 2013. (Proceedings of the ASME Turbo Expo; Vol. 3).

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

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Chung H, Park JS, Sohn HS, Rhee DH, Cho HH. Trailing edge cooling of a gas turbine blade with perforated blockages with inclined holes. In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, GT 2013. 2013. (Proceedings of the ASME Turbo Expo). https://doi.org/10.1115/GT2013-95445