Heat transfer in an airfoil trailing edge configuration with shaped pedestals mounted internal cooling channel and pressure side cutback

Shuping P. Chen, Peiwen W. Li, Minking K. Chyu, Frank J. Cunha, William Abdel-Messeh

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

28 Scopus citations

Abstract

Described in this paper is an experimental study of heat transfer over a trailing edge configuration preceded with an internal cooling channel of pedestal array. The pedestal array consists of both circular pedestals and oblong shaped blocks. Downstream to the pedestal array, the trailing edge features pressure side cutback partitioned by the oblong shaped blocks. The local heat transfer coefficient over the entire wetted surface in the internal cooling chamber has been determined by using a "hybrid" measurement technique based on transient liquid crystal imaging. The hybrid technique employs the transient conduction model in a semi-infinite solid for resolving the heat transfer coefficient on the endwall surface uncovered by the pedestals. The heat transfer coefficient over a pedestal can be resolved by the lumped capacitance method with an assumption of low Biot number. The overall heat transfer for both the pedestals and endwalls combined shows a significant enhancement compared to the case with thermally developed smooth channel. Near the downstream most section of the suction side, the land, due to pressure side cutback, is exposed to the stream mixed with hot gas and discharged coolant. Both the adiabatic effectiveness and heat transfer coefficient on the land section are characterized by using the transient liquid crystal technique.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air
Pages819-828
Number of pages10
DOIs
StatePublished - Nov 15 2006
Externally publishedYes
Event2006 ASME 51st Turbo Expo - Barcelona, Spain
Duration: May 6 2006May 11 2006

Publication series

NameProceedings of the ASME Turbo Expo
Volume3 PART A

Other

Other2006 ASME 51st Turbo Expo
CountrySpain
CityBarcelona
Period5/6/065/11/06

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Heat transfer in an airfoil trailing edge configuration with shaped pedestals mounted internal cooling channel and pressure side cutback'. Together they form a unique fingerprint.

  • Cite this

    Chen, S. P., Li, P. W., Chyu, M. K., Cunha, F. J., & Abdel-Messeh, W. (2006). Heat transfer in an airfoil trailing edge configuration with shaped pedestals mounted internal cooling channel and pressure side cutback. In Proceedings of the ASME Turbo Expo 2006 - Power for Land, Sea, and Air (pp. 819-828). (Proceedings of the ASME Turbo Expo; Vol. 3 PART A). https://doi.org/10.1115/GT2006-91019