Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2011-07-19
2011-07-19
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S228000, C416S24100B, C427S282000
Reexamination Certificate
active
07980820
ABSTRACT:
A blade is provided for a turbine engine that includes an exterior surface. The exterior surface includes a portion having a thermal barrier coating and an uncoated shelf adjacent to the thermal barrier coating without the thermal barrier coating. A cooling hole extends from an internal passageway through the exterior surface to an exit. A scarfed channel is recessed in the exterior surface and interconnected to the cooling hole at the exit. The scarfed channel extends to a blade tip end surface. The scarfed channel protects the cooling fluid exiting the cooling hole from secondary flows surrounding the blade that would otherwise mix with and disperse the cooling fluid. The scarfed channels also increase the surface area exposed to the cooling fluid to increase the heat transfer rate.
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Bunker, Ronald S., “Gas Turbine Heat Transfer: 10 Remaining Hot Gas Path Challenges,” Proceedings of GT2006, ASME Turbo Expo 2006: Power for Land, Sea and Air, May 8-11, 2006, Barcelona, Spain.
Agli, III William A.
Gayman Scott W.
Pietraszkiewicz Edward F.
Piggush Justin D.
Carlson & Gaskey & Olds PC
Nguyen Ninh H
United Technologies Corporation
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