Turbine airfoil with cast platform cooling circuit

A turbine airfoil apparatus (10, 110) includes: an airfoil (18, 118) including a concave pressure sidewall (20, 120) and a convex suction sidewall (22, 122) joined together at a leading edge (24, 124) and a trailing edge (26, 126); an endwall (16, 116) projecting laterally outwardly from the airfoil...

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Bibliographic Details
Main Authors BRASSFIELD STEVEN ROBERT, PEARSON SHAWN MICHAEL, MOLTER STEPHEN MARK, STEGEMILLER MARK EDWARD
Format Patent
LanguageEnglish
Published 25.02.2015
Subjects
BLASTING
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
STEAM ENGINES
WEAPONS
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Summary:A turbine airfoil apparatus (10, 110) includes: an airfoil (18, 118) including a concave pressure sidewall (20, 120) and a convex suction sidewall (22, 122) joined together at a leading edge (24, 124) and a trailing edge (26, 126); an endwall (16, 116) projecting laterally outwardly from the airfoil (18, 118) at one spanwise end thereof, the endwall (16, 116) having an outer surface (42, 142) facing the airfoil 18, 118) and an opposing inner surface (40, 140); a plenum (44, 144) defined within the endwall (16, 116) between the inner (40, 140) and outer surfaces (42, 142) wherein the plenum (44, 144) is forked in plan view, with at least two branches, each branch having a throat (2, 4, 102, 104) disposed at its upstream end; and at least one film cooling hole (48, 148) passing through the outer surface (42, 142) and communicating with the plenum (44, 144).
Bibliography:Application Number: CN201380031535