Metal working – Method of mechanical manufacture – Impeller making
Patent
1996-05-17
1998-06-30
Cuda, Irene
Metal working
Method of mechanical manufacture
Impeller making
2988972, B23D 1500
Patent
active
057715777
ABSTRACT:
A fluid cooled article having a protective coating on a surface, for example an air cooled gas turbine engine article having a Thermal Barrier Coating, includes through an article wall a fluid cooling passage, and typically a plurality of passages, having openings sized to maintain desired fluid flow, unobstructed by coating within the passage at an exit opening. The passage has a first or inlet opening, which establishes the amount of fluid flow through the passage, and a second opening through which the flow exits the passage through a wall surface on which the coating is deposited. A method for making the article to have such unobstructed flow includes selecting a cross sectional area for the first opening, selecting a coating method for deposit of the coating, in a selected thickness range, on the wall surface and partially within the passage at the second opening, and generating the passage to have a second opening with a cross sectional area greater than that of the first opening by an amount which is no less than a reduction in cross sectional area resulting from partial deposit of the coating through the second opening.
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Gupta Bhupendra K.
Scheidt Wilbur D.
Ziegler Robert P.
Cuda Irene
General Electric Company
Herkamp Nathan D.
Hess Andrew C.
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