Prediction of heat transfer characteristics for discrete hole film cooling for turbine blade applications

Daneshmund K. Tafti, Savash Yavuzkurt

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

Abstract

A two-dimensional (2-D) injection model is used with a 2-D low Reynold's number k-ε model boundary layer code. The three-dimensional effects of the discrete hole injection process is introduced in the 2-D prediction scheme through an "entrainment fraction" (T). An established correlation between T and the injection parameters obtained in a previous paper is used to predict the film cooling effectiveness (η¯) and heat transfer coefficients for multirow injection, injection into a laminar boundary layer and finally injection on convex curved surfaces. Predictions of η¯are in good agreement with experimental data for most of the cases tested. Predictions of Stanton numbers defined by St(0) and St(1) are good for low injection ratios (M) but as M increases the values are underpredicted. In spite of some shortcomings, in the authors' opinion the present 2-D prediction scheme is one of the most comprehensive developed so far. It is seen that the entrainment fraction T is quite universal in its application to 2-D predictions of the discrete hole film cooling process.

Original languageEnglish (US)
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791879160
DOIs
StatePublished - 1989
EventASME 1989 International Gas Turbine and Aeroengine Congress and Exposition, GT 1989 - Toronto, Canada
Duration: Jun 4 1989Jun 8 1989

Publication series

NameProceedings of the ASME Turbo Expo
Volume4

Other

OtherASME 1989 International Gas Turbine and Aeroengine Congress and Exposition, GT 1989
CountryCanada
CityToronto
Period6/4/896/8/89

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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