Aero-thermal performances of leakage flows injection from the endwall slot in linear cascade of high-pressure turbine

Wan Aizon Wan Ghopa, Zambri Harun, Ken ichi Funazaki, Takemitsu Miura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The existence of a gap between combustor and turbine endwall in the real gas turbine induces to the leakages phenomenon. However, the leakages could be used as a coolant to protect the endwall surfaces from the hot gas since it could not be completely prevented. Thus, present study investigated the potential of leakage flows as a function of film cooling. In present study, the flow field at the downstream of high-pressure turbine blade has been investigated by 5-holes pitot tube. This is to reveal the aerodynamic performances under the influenced of leakage flows while the temperature measurement was conducted by thermochromic liquid crystal (TLC). Experimental has significantly captured theaerodynamics effect of leakage flows near the blade downstream. Furthermore, TLC measurement illustrated that the film cooling effectiveness contours were strongly influenced by the secondary flows behavior on the endwall region. Aero-thermal results were validated by the numerical simulation adopted by commercial software, ANSYS CFX 13. Both experimental and numerical simulation indicated almost similar trendinaero and also thermal behavior as the amount of leakage flows increases.

Original languageEnglish
Pages (from-to)49-57
Number of pages9
JournalJournal of Thermal Science
Volume24
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

turbines
slots
cascades
leakage
injection
film cooling
pitot tubes
liquid crystals
real gases
secondary flow
turbine blades
gas turbines
coolants
high temperature gases
combustion chambers
blades
aerodynamics
temperature measurement
flow distribution
simulation

Keywords

  • aerodynamic loss
  • endwall filmcooling
  • film cooling effectiveness
  • leakage flows
  • secondary flows

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Aero-thermal performances of leakage flows injection from the endwall slot in linear cascade of high-pressure turbine. / Wan Ghopa, Wan Aizon; Harun, Zambri; Funazaki, Ken ichi; Miura, Takemitsu.

In: Journal of Thermal Science, Vol. 24, No. 1, 2015, p. 49-57.

Research output: Contribution to journalArticle

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