Large Eddy simulation of film-cooling above the flat surface with a large plenum and short exit holes

Ioulia V. Iourokina, Sanjiva K. Lele

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

17 Scopus citations

Abstract

AIAA Large Eddy Simulation of a realistic film-cooling configuration is performed, consisting of a large plenum feeding a periodic array of short film-cooling holes with length to diameter ratio L/d = 3.5. Film-cooling jets are issued at 35 degrees into the turbulent crossflow boundary layer above the flat surface. Details of the flowfield inside the film-cooling hole as well as above the cooled surface are analyzed. Separation is found inside the hole caused by the sharp turning of the flow exiting the plenum. Vortical structures of inclined jet in a crossflow are observed and compared to that found in normals jets. The effect of crossflow fluid entrainment beneath the jet by the low pressure zone is demonstrated and its connection to the film-cooling effectiveness is discussed. Time-averaged velocity field and turbulence statistics are compared to the available experimental data.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Pages13338-13353
Number of pages16
StatePublished - Dec 1 2006
Externally publishedYes
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: Jan 9 2006Jan 12 2006

Publication series

NameCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Volume18

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period1/9/061/12/06

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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    Iourokina, I. V., & Lele, S. K. (2006). Large Eddy simulation of film-cooling above the flat surface with a large plenum and short exit holes. In Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting (pp. 13338-13353). (Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting; Vol. 18).