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Experiments in Fluids

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01.02.2008 | Research Article

High resolution PIV measurements around a model turbine blade trailing edge film-cooling breakout

verfasst von: Yude Chen, Claude G. Matalanis, John K. Eaton

Erschienen in: Experiments in Fluids | Ausgabe 2/2008

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Abstract

Film cooling downstream of a model turbine blade trailing edge has been studied experimentally. High resolution particle image velocimetry was used to obtain spatially resolved mean velocity and turbulence measurements in the immediate vicinity of the trailing edge breakout. The mean velocity measurements imply the presence of a pair of counter-rotating longitudinal vortices shed from the sides of the breakout lands. The turbulent shear stress measurements above the breakout are significantly intensified as blowing ratio is increased. These results suggest that there is a strong mixing between the film cooling slot jets and the mainstream flow which degrades the film cooling effectiveness.

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Titel: High resolution PIV measurements around a model turbine blade trailing edge film-cooling breakout
verfasst von: Yude Chen
Claude G. Matalanis
John K. Eaton
Publikationsdatum: 01.02.2008
Verlag: Springer-Verlag
Erschienen in: Experiments in Fluids / Ausgabe 2/2008
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-007-0391-2

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