Heat Transfer and Flow Characteristics on a Gas Turbine Shroud

: The work described in this paper is an experimental investigation of the heat transfer from the main flow to a turbine shroud surface, which may be applicable to ceramic gas turbines. Three kinds of turbine shrouds are considered with a flat surface, a taper surface and a spiral groove surface opp...

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Bibliographic Details
Published in:Annals of the New York Academy of Sciences 2001-05, Vol.934 (1), p.289-296
Main Authors: OBATA, Masakazu, KUMADA, Masaya, IJICHI, Nobuaki
Format: Article
Language:English
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Summary:: The work described in this paper is an experimental investigation of the heat transfer from the main flow to a turbine shroud surface, which may be applicable to ceramic gas turbines. Three kinds of turbine shrouds are considered with a flat surface, a taper surface and a spiral groove surface opposite to the blades in an axial flow turbine of actual turbo‐charger. Heat transfer measurements were performed for the experimental conditions of a uniform heat flux or a uniform wall temperature. The effects of the inlet flow angle, rotational speed, and tip clearance on the heat transfer coefficient were clarified under on‐ and off‐design flow conditions. The mean heat transfer coefficient was correlated to the blade Reynolds number and tip clearance, and compared with an experimental correlation and measurements of a flat surface. A comparison was also made for the measurement of static pressure distributions.
ISSN:0077-8923
1749-6632
DOI:10.1111/j.1749-6632.2001.tb05862.x