Heat transfer in leading edge, triangular shaped cooling channels with angled ribs under high rotation numbers

Yao-Hsien Liu, Michael Huh, Dong Ho Rhee, Je Chin Han, Hee Koo Moon

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

The gas turbine blade/vane internal cooling is achieved by circulating the compressed air through the cooling channels inside the turbine blade. Cooling channel geometries vary to fit the blade profile. This paper experimentally investigated the rotational effects on heat transfer in an equilateral triangular channel (Dh= 1.83cm). The triangular shaped channel is applicable to the leading edge of the gas turbine blade. 45° angled ribs are put on the leading and trailing surfaces of the test section to enhance heat transfer. The rib pitch-to-height ratio (P/e) is 8 and the height-to-hydraulic diameter ratio (e/Dh) is 0.087. Effect of the angled ribs under high rotation numbers and buoyancy parameters are also presented. Results show that due to the radially outward flow, heat transfer is enhanced with rotation on the trailing surface. By varying the Reynolds numbers (10000-40000) and the rotational speeds (0-400 rpm), the rotation number and buoyancy parameter reached in this study are 0-0.58 and 0-1.9, respectively. The higher rotation number and buoyancy parameter have been correlated very well to predict the rotational heat transfer in the equilateral triangular channel.

Original languageEnglish
Title of host publication2008 Proceedings of the ASME Turbo Expo
Subtitle of host publicationPower for Land, Sea, and Air
Pages321-329
Number of pages9
EditionPART A
DOIs
StatePublished - 1 Dec 2008
Event2008 ASME Turbo Expo - 2008 ASME Turbo Expo, Germany
Duration: 9 Jun 200813 Jun 2008

Publication series

NameProceedings of the ASME Turbo Expo
NumberPART A
Volume4

Conference

Conference2008 ASME Turbo Expo
CountryGermany
City2008 ASME Turbo Expo
Period9/06/0813/06/08

Fingerprint Dive into the research topics of 'Heat transfer in leading edge, triangular shaped cooling channels with angled ribs under high rotation numbers'. Together they form a unique fingerprint.

Cite this