BOAS with multi-metering diffusion cooling

Details BOAS with multi-metering diffusion cooling BOAS with multi-metering diffusion cooling

2007-01-26

2009-10-06

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

C415S173100, C415S173400, C415S176000, C415S178000

Reexamination Certificate

active

07597533

ABSTRACT:
A blade outer air seal used in a gas turbine engine, the BOAS including a metering plate with metering holes and an impingement plate with impingement holes, the metering plate and impingement plate forming a plurality of separate diffusion cavities forming a grid. A porous metallic plate is bonded to the underside of the impingement plate and has a plurality of cooling channels extending from the leading edge to the trailing edge of the BOAS. Cooling air from the blade ring carrier is metered through the metering holes and into the diffusion cavities, and then passes through a plurality of impingement holes and into a cooling channel, to be discharged out the trailing edge side of the BOAS. Inter-segment cooling holes also pass cooling air out to the sides of the BOAS.

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