Surface injection effect on mass transfer from a cylinder in crossflow: A simulation of film cooling in the leading edge region of a turbine blade

J. Karni, R. J. Goldstein

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

2 Scopus citations

Abstract

A naphthalene sublimation technique is used to study the effect of surface injection on the mass (heat) transfer from a circular cylinder in crossflow. Using a heat/mass transfer analogy the results can be used to predict film cooling effects in the leading edge region of a turbine blade. Air injection through one row of circular holes is employed in the stagnation region of the cylinder. Streamwise and spanwise injection inclinations are studied separately, and the effects of blowing rate and injection location relative to the cylinder front stagnation line are investigated. Streamwise injection produces significant mass transfer increases downstream of the injection holes, but a relatively small increase is observed between holes, normal to the injection direction. The mass transfer distribution, measured with spanwise injection through holes located near the cylinder front stagnation line, is extremely sensitive to small changes in the injection hole location relative to stagnation. When the centers of the spanwise injection holes are located 5° or more from the stagnation line, the holes lay entirely on one side of the stagnation line and the injection affects the mass transfer only on that side of the cylinder, approaching the pattern observed with streamwise injection.

Original languageEnglish (US)
Title of host publicationHeat Transfer; Electric Power; Industrial and Cogeneration
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume4
ISBN (Print)9780791879160
DOIs
StatePublished - 1989
EventASME 1989 International Gas Turbine and Aeroengine Congress and Exposition, GT 1989 - Toronto, Canada
Duration: Jun 4 1989Jun 8 1989

Other

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

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