Numerical analysis on the leading edge film cooling of bifurcation holes for gas turbine blade

Zhonghao Tang, Gongnan Xie, Honglin Li, Wenjing Gao, Chunlong Tan, Lei Li

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

3 Scopus citations

Abstract

Film cooling performance of the cylindrical film holes and the bifurcated film holes on the leading edge model of the turbine blade are investigated in this paper. The suitability of different turbulence models to predict local and average film cooling effectiveness is validated by comparing with available experimental results. Three rows of holes are arranged in a semi-cylindrical model to simulate the leading edge of the turbine blade. Four different film cooling structures (including a cylindrical film holes and other three different bifurcated film holes) and four different blowing ratios are studied in detail. The results show that the film jets lift off gradually in the leading edge area as the blowing ratio increases. And the trajectory of the film jets gradually deviate from the mainstream direction to the spanwise direction. The cylindrical film holes and vertical bifurcated film holes have better film cooling effectiveness at low blowing ratio while the other two transverse bifurcated film holes have better film cooling effectiveness at high blowing ratio. And the film cooling effectiveness of the transverse bifurcated film holes increase with the increasing the blowing ratio. Additionally, the advantage of transverse bifurcated holes in film cooling effectiveness is more obvious in the downstream region relative to the cylindrical holes. The Area-Average film cooling effectiveness of transverse bifurcated film holes is 38% higher than that of cylindrical holes when blowing ratio is 2.

Original languageEnglish
Title of host publicationProceedings of the ASME 2021 Heat Transfer Summer Conference, HT 2021
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791884874
DOIs
StatePublished - 2021
EventASME 2021 Heat Transfer Summer Conference, HT 2021 - Virtual, Online
Duration: 16 Jun 202118 Jun 2021

Publication series

NameProceedings of the ASME 2021 Heat Transfer Summer Conference, HT 2021

Conference

ConferenceASME 2021 Heat Transfer Summer Conference, HT 2021
CityVirtual, Online
Period16/06/2118/06/21

Keywords

  • Bifurcated film holes
  • Film cooling
  • Leading edge
  • Turbine blade

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