An experimental investigation of a new hybrid film cooling scheme

M. Ghorab, I. Hassan, T. Lucas

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

Abstract

This paper presents an experimental investigation of the film cooling performance of a New Hybrid Film Cooling Scheme using Thermochromic Liquid Crystal technique. The new scheme has been designed to improve the film cooling performance of gas turbine airfoils. The scheme includes two consecutive film hole configurations with interior bending. The cooling performance of the new scheme was analyzed across blowing ratios of 0.5, 1.0 and 1.5, at a density ratio of 0.94. The results showed that the new scheme enhanced the local and the laterally averaged film cooling performance in terms of effectiveness, and net heat flux reduction in compared to other film hole configurations. The bending effect of the new scheme throttled the secondary flow causing it to spread widely over the downstream surfaces, hence enhancing the film cooling performance at low and high blowing ratios. The hybrid scheme provided an average heat transfer ratio near unity over the downstream surfaces at low and high blowing ratios.

Original languageEnglish
Title of host publication2010 14th International Heat Transfer Conference, IHTC 14
Pages311-320
Number of pages10
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes
Event2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States
Duration: 8 Aug 201013 Aug 2010

Publication series

Name2010 14th International Heat Transfer Conference, IHTC 14
Volume5

Conference

Conference2010 14th International Heat Transfer Conference, IHTC 14
CountryUnited States
CityWashington, DC
Period8/8/1013/8/10

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Keywords

  • Film cooling effectiveness
  • Heat transfer coefficient ratio
  • Hybrid
  • NHFR
  • TLC

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Ghorab, M., Hassan, I., & Lucas, T. (2010). An experimental investigation of a new hybrid film cooling scheme. In 2010 14th International Heat Transfer Conference, IHTC 14 (pp. 311-320). (2010 14th International Heat Transfer Conference, IHTC 14; Vol. 5). https://doi.org/10.1115/IHTC14-23263